commit b027ca341afaadea5ad9848759393dcc45e4bcf5
Author: Michael Murtaugh <mm@automatist.org>
Date:   Mon May 27 16:05:50 2019 +0200

    plum erg

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..86d062e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+
+dist/wikimap.js: src/*.js
+	# node_modules/.bin/rollup src/index.js --file dist/index.js --format iife
+	node_modules/.bin/rollup -c 
+
+dist/%.js: src/%.js src/*.js
+	# node_modules/.bin/rollup src/index.js --file dist/index.js --format iife
+	node_modules/.bin/rollup -c 
\ No newline at end of file
diff --git a/cats.json b/cats.json
new file mode 100644
index 0000000..4ba9ad9
--- /dev/null
+++ b/cats.json
@@ -0,0 +1,257 @@
+[
+  {
+    "title": "Actualit\u00e9s",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Actualit\u00e9s"
+  },
+  {
+    "title": "Actualit\u00e9s (2013)",
+    "depth": 1,
+    "parent": "Actualit\u00e9s",
+    "name": "Cat\u00e9gorie:Actualit\u00e9s (2013)"
+  },
+  {
+    "title": "Actualit\u00e9s (2014)",
+    "depth": 1,
+    "parent": "Actualit\u00e9s",
+    "name": "Cat\u00e9gorie:Actualit\u00e9s (2014)"
+  },
+  {
+    "title": "Actualit\u00e9s (2015)",
+    "depth": 1,
+    "parent": "Actualit\u00e9s",
+    "name": "Cat\u00e9gorie:Actualit\u00e9s (2015)"
+  },
+  {
+    "title": "Actualit\u00e9s (2016)",
+    "depth": 1,
+    "parent": "Actualit\u00e9s",
+    "name": "Cat\u00e9gorie:Actualit\u00e9s (2016)"
+  },
+  {
+    "title": "Actualit\u00e9s (2017)",
+    "depth": 1,
+    "parent": "Actualit\u00e9s",
+    "name": "Cat\u00e9gorie:Actualit\u00e9s (2017)"
+  },
+  {
+    "title": "Actualit\u00e9s (2018)",
+    "depth": 1,
+    "parent": "Actualit\u00e9s",
+    "name": "Cat\u00e9gorie:Actualit\u00e9s (2018)"
+  },
+  {
+    "title": "Actualit\u00e9s (2019)",
+    "depth": 1,
+    "parent": "Actualit\u00e9s",
+    "name": "Cat\u00e9gorie:Actualit\u00e9s (2019)"
+  },
+  {
+    "title": "Ateliers pluridisciplinaires",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Ateliers pluridisciplinaires"
+  },
+  {
+    "title": "Ateliers pluridisciplinaires (BA)",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Ateliers pluridisciplinaires (BA)"
+  },
+  {
+    "title": "Ateliers pluridisciplinaires (MA)",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Ateliers pluridisciplinaires (MA)"
+  },
+  {
+    "title": "B1",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:B1"
+  },
+  {
+    "title": "B2",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:B2"
+  },
+  {
+    "title": "B3",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:B3"
+  },
+  {
+    "title": "Bachelors",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Bachelors"
+  },
+  {
+    "title": "Cours de soutien sp\u00e9cifique",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Cours de soutien sp\u00e9cifique"
+  },
+  {
+    "title": "Cours techniques",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Cours techniques"
+  },
+  {
+    "title": "Cours th\u00e9oriques",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Cours th\u00e9oriques"
+  },
+  {
+    "title": "Critique du f\u00e9minisme",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Critique du f\u00e9minisme"
+  },
+  {
+    "title": "English",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:English"
+  },
+  {
+    "title": "\u00c9quipes",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:\u00c9quipes"
+  },
+  {
+    "title": "Conseil de gestion p\u00e9dagogique",
+    "depth": 1,
+    "parent": "\u00c9quipes",
+    "name": "Cat\u00e9gorie:Conseil de gestion p\u00e9dagogique"
+  },
+  {
+    "title": "Conseil \u00e9tudiant",
+    "depth": 1,
+    "parent": "\u00c9quipes",
+    "name": "Cat\u00e9gorie:Conseil \u00e9tudiant"
+  },
+  {
+    "title": "Enseignants",
+    "depth": 1,
+    "parent": "\u00c9quipes",
+    "name": "Cat\u00e9gorie:Enseignants"
+  },
+  {
+    "title": "\u00c9quipe administrative",
+    "depth": 1,
+    "parent": "\u00c9quipes",
+    "name": "Cat\u00e9gorie:\u00c9quipe administrative"
+  },
+  {
+    "title": "Essai paru en 1984",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Essai paru en 1984"
+  },
+  {
+    "title": "\u00c9tudes de genre",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:\u00c9tudes de genre"
+  },
+  {
+    "title": "Index",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Index"
+  },
+  {
+    "title": "International",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:International"
+  },
+  {
+    "title": "Les lieux de production et d'exp\u00e9rimentation",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Les lieux de production et d'exp\u00e9rimentation"
+  },
+  {
+    "title": "Livre sur le f\u00e9minisme",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Livre sur le f\u00e9minisme"
+  },
+  {
+    "title": "Masters",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Masters"
+  },
+  {
+    "title": "Cours de soutien \u00e0 l'orientation",
+    "depth": 1,
+    "parent": "Masters",
+    "name": "Cat\u00e9gorie:Cours de soutien \u00e0 l'orientation"
+  },
+  {
+    "title": "M1",
+    "depth": 1,
+    "parent": "Masters",
+    "name": "Cat\u00e9gorie:M1"
+  },
+  {
+    "title": "M2",
+    "depth": 1,
+    "parent": "Masters",
+    "name": "Cat\u00e9gorie:M2"
+  },
+  {
+    "title": "Masters sp\u00e9cialis\u00e9s",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Masters sp\u00e9cialis\u00e9s"
+  },
+  {
+    "title": "Orientations",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Orientations"
+  },
+  {
+    "title": "Outils collectifs",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Outils collectifs"
+  },
+  {
+    "title": "Pages avec des erreurs de coloration syntaxique",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Pages avec des erreurs de coloration syntaxique"
+  },
+  {
+    "title": "Pages avec des liens de fichiers bris\u00e9s",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Pages avec des liens de fichiers bris\u00e9s"
+  },
+  {
+    "title": "Page web",
+    "depth": 1,
+    "parent": "Pages avec des liens de fichiers bris\u00e9s",
+    "name": "Cat\u00e9gorie:Page web"
+  },
+  {
+    "title": "Pages d\u00e9passant la profondeur d'expansion maximale",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Pages d\u00e9passant la profondeur d'expansion maximale"
+  },
+  {
+    "title": "Provenance web",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Provenance web"
+  },
+  {
+    "title": "Selection",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Selection"
+  },
+  {
+    "title": "Sites satellites",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Sites satellites"
+  },
+  {
+    "title": "Sites sattelites",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Sites sattelites"
+  },
+  {
+    "title": "Stages",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Stages"
+  },
+  {
+    "title": "Wiki only",
+    "depth": 0,
+    "name": "Cat\u00e9gorie:Wiki only"
+  }
+]
diff --git a/dist/index.js b/dist/index.js
new file mode 100644
index 0000000..7e9a93b
--- /dev/null
+++ b/dist/index.js
@@ -0,0 +1,788 @@
+var index = (function (exports) {
+  'use strict';
+
+  if (typeof document !== "undefined") {
+    var element = document.documentElement;
+  }
+
+  function tree_add(d) {
+    var x = +this._x.call(null, d),
+        y = +this._y.call(null, d);
+    return add(this.cover(x, y), x, y, d);
+  }
+
+  function add(tree, x, y, d) {
+    if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points
+
+    var parent,
+        node = tree._root,
+        leaf = {data: d},
+        x0 = tree._x0,
+        y0 = tree._y0,
+        x1 = tree._x1,
+        y1 = tree._y1,
+        xm,
+        ym,
+        xp,
+        yp,
+        right,
+        bottom,
+        i,
+        j;
+
+    // If the tree is empty, initialize the root as a leaf.
+    if (!node) return tree._root = leaf, tree;
+
+    // Find the existing leaf for the new point, or add it.
+    while (node.length) {
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+      if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
+    }
+
+    // Is the new point is exactly coincident with the existing point?
+    xp = +tree._x.call(null, node.data);
+    yp = +tree._y.call(null, node.data);
+    if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;
+
+    // Otherwise, split the leaf node until the old and new point are separated.
+    do {
+      parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+    } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
+    return parent[j] = node, parent[i] = leaf, tree;
+  }
+
+  function addAll(data) {
+    var d, i, n = data.length,
+        x,
+        y,
+        xz = new Array(n),
+        yz = new Array(n),
+        x0 = Infinity,
+        y0 = Infinity,
+        x1 = -Infinity,
+        y1 = -Infinity;
+
+    // Compute the points and their extent.
+    for (i = 0; i < n; ++i) {
+      if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
+      xz[i] = x;
+      yz[i] = y;
+      if (x < x0) x0 = x;
+      if (x > x1) x1 = x;
+      if (y < y0) y0 = y;
+      if (y > y1) y1 = y;
+    }
+
+    // If there were no (valid) points, abort.
+    if (x0 > x1 || y0 > y1) return this;
+
+    // Expand the tree to cover the new points.
+    this.cover(x0, y0).cover(x1, y1);
+
+    // Add the new points.
+    for (i = 0; i < n; ++i) {
+      add(this, xz[i], yz[i], data[i]);
+    }
+
+    return this;
+  }
+
+  function tree_cover(x, y) {
+    if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points
+
+    var x0 = this._x0,
+        y0 = this._y0,
+        x1 = this._x1,
+        y1 = this._y1;
+
+    // If the quadtree has no extent, initialize them.
+    // Integer extent are necessary so that if we later double the extent,
+    // the existing quadrant boundaries don’t change due to floating point error!
+    if (isNaN(x0)) {
+      x1 = (x0 = Math.floor(x)) + 1;
+      y1 = (y0 = Math.floor(y)) + 1;
+    }
+
+    // Otherwise, double repeatedly to cover.
+    else {
+      var z = x1 - x0,
+          node = this._root,
+          parent,
+          i;
+
+      while (x0 > x || x >= x1 || y0 > y || y >= y1) {
+        i = (y < y0) << 1 | (x < x0);
+        parent = new Array(4), parent[i] = node, node = parent, z *= 2;
+        switch (i) {
+          case 0: x1 = x0 + z, y1 = y0 + z; break;
+          case 1: x0 = x1 - z, y1 = y0 + z; break;
+          case 2: x1 = x0 + z, y0 = y1 - z; break;
+          case 3: x0 = x1 - z, y0 = y1 - z; break;
+        }
+      }
+
+      if (this._root && this._root.length) this._root = node;
+    }
+
+    this._x0 = x0;
+    this._y0 = y0;
+    this._x1 = x1;
+    this._y1 = y1;
+    return this;
+  }
+
+  function tree_data() {
+    var data = [];
+    this.visit(function(node) {
+      if (!node.length) do data.push(node.data); while (node = node.next)
+    });
+    return data;
+  }
+
+  function tree_extent(_) {
+    return arguments.length
+        ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
+        : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
+  }
+
+  function Quad(node, x0, y0, x1, y1) {
+    this.node = node;
+    this.x0 = x0;
+    this.y0 = y0;
+    this.x1 = x1;
+    this.y1 = y1;
+  }
+
+  function tree_find(x, y, radius) {
+    var data,
+        x0 = this._x0,
+        y0 = this._y0,
+        x1,
+        y1,
+        x2,
+        y2,
+        x3 = this._x1,
+        y3 = this._y1,
+        quads = [],
+        node = this._root,
+        q,
+        i;
+
+    if (node) quads.push(new Quad(node, x0, y0, x3, y3));
+    if (radius == null) radius = Infinity;
+    else {
+      x0 = x - radius, y0 = y - radius;
+      x3 = x + radius, y3 = y + radius;
+      radius *= radius;
+    }
+
+    while (q = quads.pop()) {
+
+      // Stop searching if this quadrant can’t contain a closer node.
+      if (!(node = q.node)
+          || (x1 = q.x0) > x3
+          || (y1 = q.y0) > y3
+          || (x2 = q.x1) < x0
+          || (y2 = q.y1) < y0) continue;
+
+      // Bisect the current quadrant.
+      if (node.length) {
+        var xm = (x1 + x2) / 2,
+            ym = (y1 + y2) / 2;
+
+        quads.push(
+          new Quad(node[3], xm, ym, x2, y2),
+          new Quad(node[2], x1, ym, xm, y2),
+          new Quad(node[1], xm, y1, x2, ym),
+          new Quad(node[0], x1, y1, xm, ym)
+        );
+
+        // Visit the closest quadrant first.
+        if (i = (y >= ym) << 1 | (x >= xm)) {
+          q = quads[quads.length - 1];
+          quads[quads.length - 1] = quads[quads.length - 1 - i];
+          quads[quads.length - 1 - i] = q;
+        }
+      }
+
+      // Visit this point. (Visiting coincident points isn’t necessary!)
+      else {
+        var dx = x - +this._x.call(null, node.data),
+            dy = y - +this._y.call(null, node.data),
+            d2 = dx * dx + dy * dy;
+        if (d2 < radius) {
+          var d = Math.sqrt(radius = d2);
+          x0 = x - d, y0 = y - d;
+          x3 = x + d, y3 = y + d;
+          data = node.data;
+        }
+      }
+    }
+
+    return data;
+  }
+
+  function tree_remove(d) {
+    if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points
+
+    var parent,
+        node = this._root,
+        retainer,
+        previous,
+        next,
+        x0 = this._x0,
+        y0 = this._y0,
+        x1 = this._x1,
+        y1 = this._y1,
+        x,
+        y,
+        xm,
+        ym,
+        right,
+        bottom,
+        i,
+        j;
+
+    // If the tree is empty, initialize the root as a leaf.
+    if (!node) return this;
+
+    // Find the leaf node for the point.
+    // While descending, also retain the deepest parent with a non-removed sibling.
+    if (node.length) while (true) {
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+      if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
+      if (!node.length) break;
+      if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
+    }
+
+    // Find the point to remove.
+    while (node.data !== d) if (!(previous = node, node = node.next)) return this;
+    if (next = node.next) delete node.next;
+
+    // If there are multiple coincident points, remove just the point.
+    if (previous) return (next ? previous.next = next : delete previous.next), this;
+
+    // If this is the root point, remove it.
+    if (!parent) return this._root = next, this;
+
+    // Remove this leaf.
+    next ? parent[i] = next : delete parent[i];
+
+    // If the parent now contains exactly one leaf, collapse superfluous parents.
+    if ((node = parent[0] || parent[1] || parent[2] || parent[3])
+        && node === (parent[3] || parent[2] || parent[1] || parent[0])
+        && !node.length) {
+      if (retainer) retainer[j] = node;
+      else this._root = node;
+    }
+
+    return this;
+  }
+
+  function removeAll(data) {
+    for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
+    return this;
+  }
+
+  function tree_root() {
+    return this._root;
+  }
+
+  function tree_size() {
+    var size = 0;
+    this.visit(function(node) {
+      if (!node.length) do ++size; while (node = node.next)
+    });
+    return size;
+  }
+
+  function tree_visit(callback) {
+    var quads = [], q, node = this._root, child, x0, y0, x1, y1;
+    if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
+    while (q = quads.pop()) {
+      if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
+        var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+        if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+        if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+        if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+        if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+      }
+    }
+    return this;
+  }
+
+  function tree_visitAfter(callback) {
+    var quads = [], next = [], q;
+    if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
+    while (q = quads.pop()) {
+      var node = q.node;
+      if (node.length) {
+        var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+        if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+        if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+        if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+        if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+      }
+      next.push(q);
+    }
+    while (q = next.pop()) {
+      callback(q.node, q.x0, q.y0, q.x1, q.y1);
+    }
+    return this;
+  }
+
+  function defaultX(d) {
+    return d[0];
+  }
+
+  function tree_x(_) {
+    return arguments.length ? (this._x = _, this) : this._x;
+  }
+
+  function defaultY(d) {
+    return d[1];
+  }
+
+  function tree_y(_) {
+    return arguments.length ? (this._y = _, this) : this._y;
+  }
+
+  function quadtree(nodes, x, y) {
+    var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
+    return nodes == null ? tree : tree.addAll(nodes);
+  }
+
+  function Quadtree(x, y, x0, y0, x1, y1) {
+    this._x = x;
+    this._y = y;
+    this._x0 = x0;
+    this._y0 = y0;
+    this._x1 = x1;
+    this._y1 = y1;
+    this._root = undefined;
+  }
+
+  function leaf_copy(leaf) {
+    var copy = {data: leaf.data}, next = copy;
+    while (leaf = leaf.next) next = next.next = {data: leaf.data};
+    return copy;
+  }
+
+  var treeProto = quadtree.prototype = Quadtree.prototype;
+
+  treeProto.copy = function() {
+    var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
+        node = this._root,
+        nodes,
+        child;
+
+    if (!node) return copy;
+
+    if (!node.length) return copy._root = leaf_copy(node), copy;
+
+    nodes = [{source: node, target: copy._root = new Array(4)}];
+    while (node = nodes.pop()) {
+      for (var i = 0; i < 4; ++i) {
+        if (child = node.source[i]) {
+          if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
+          else node.target[i] = leaf_copy(child);
+        }
+      }
+    }
+
+    return copy;
+  };
+
+  treeProto.add = tree_add;
+  treeProto.addAll = addAll;
+  treeProto.cover = tree_cover;
+  treeProto.data = tree_data;
+  treeProto.extent = tree_extent;
+  treeProto.find = tree_find;
+  treeProto.remove = tree_remove;
+  treeProto.removeAll = removeAll;
+  treeProto.root = tree_root;
+  treeProto.size = tree_size;
+  treeProto.visit = tree_visit;
+  treeProto.visitAfter = tree_visitAfter;
+  treeProto.x = tree_x;
+  treeProto.y = tree_y;
+
+  var noop = {value: function() {}};
+
+  function dispatch() {
+    for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+      if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
+      _[t] = [];
+    }
+    return new Dispatch(_);
+  }
+
+  function Dispatch(_) {
+    this._ = _;
+  }
+
+  function parseTypenames(typenames, types) {
+    return typenames.trim().split(/^|\s+/).map(function(t) {
+      var name = "", i = t.indexOf(".");
+      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+      if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+      return {type: t, name: name};
+    });
+  }
+
+  Dispatch.prototype = dispatch.prototype = {
+    constructor: Dispatch,
+    on: function(typename, callback) {
+      var _ = this._,
+          T = parseTypenames(typename + "", _),
+          t,
+          i = -1,
+          n = T.length;
+
+      // If no callback was specified, return the callback of the given type and name.
+      if (arguments.length < 2) {
+        while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
+        return;
+      }
+
+      // If a type was specified, set the callback for the given type and name.
+      // Otherwise, if a null callback was specified, remove callbacks of the given name.
+      if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+      while (++i < n) {
+        if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
+        else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);
+      }
+
+      return this;
+    },
+    copy: function() {
+      var copy = {}, _ = this._;
+      for (var t in _) copy[t] = _[t].slice();
+      return new Dispatch(copy);
+    },
+    call: function(type, that) {
+      if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
+      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+      for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+    },
+    apply: function(type, that, args) {
+      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+      for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+    }
+  };
+
+  function get(type, name) {
+    for (var i = 0, n = type.length, c; i < n; ++i) {
+      if ((c = type[i]).name === name) {
+        return c.value;
+      }
+    }
+  }
+
+  function set(type, name, callback) {
+    for (var i = 0, n = type.length; i < n; ++i) {
+      if (type[i].name === name) {
+        type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+        break;
+      }
+    }
+    if (callback != null) type.push({name: name, value: callback});
+    return type;
+  }
+
+  var frame = 0, // is an animation frame pending?
+      timeout = 0, // is a timeout pending?
+      interval = 0, // are any timers active?
+      pokeDelay = 1000, // how frequently we check for clock skew
+      taskHead,
+      taskTail,
+      clockLast = 0,
+      clockNow = 0,
+      clockSkew = 0,
+      clock = typeof performance === "object" && performance.now ? performance : Date,
+      setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+
+  function now() {
+    return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+  }
+
+  function clearNow() {
+    clockNow = 0;
+  }
+
+  function Timer() {
+    this._call =
+    this._time =
+    this._next = null;
+  }
+
+  Timer.prototype = timer.prototype = {
+    constructor: Timer,
+    restart: function(callback, delay, time) {
+      if (typeof callback !== "function") throw new TypeError("callback is not a function");
+      time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
+      if (!this._next && taskTail !== this) {
+        if (taskTail) taskTail._next = this;
+        else taskHead = this;
+        taskTail = this;
+      }
+      this._call = callback;
+      this._time = time;
+      sleep();
+    },
+    stop: function() {
+      if (this._call) {
+        this._call = null;
+        this._time = Infinity;
+        sleep();
+      }
+    }
+  };
+
+  function timer(callback, delay, time) {
+    var t = new Timer;
+    t.restart(callback, delay, time);
+    return t;
+  }
+
+  function timerFlush() {
+    now(); // Get the current time, if not already set.
+    ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+    var t = taskHead, e;
+    while (t) {
+      if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+      t = t._next;
+    }
+    --frame;
+  }
+
+  function wake() {
+    clockNow = (clockLast = clock.now()) + clockSkew;
+    frame = timeout = 0;
+    try {
+      timerFlush();
+    } finally {
+      frame = 0;
+      nap();
+      clockNow = 0;
+    }
+  }
+
+  function poke() {
+    var now = clock.now(), delay = now - clockLast;
+    if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+  }
+
+  function nap() {
+    var t0, t1 = taskHead, t2, time = Infinity;
+    while (t1) {
+      if (t1._call) {
+        if (time > t1._time) time = t1._time;
+        t0 = t1, t1 = t1._next;
+      } else {
+        t2 = t1._next, t1._next = null;
+        t1 = t0 ? t0._next = t2 : taskHead = t2;
+      }
+    }
+    taskTail = t0;
+    sleep(time);
+  }
+
+  function sleep(time) {
+    if (frame) return; // Soonest alarm already set, or will be.
+    if (timeout) timeout = clearTimeout(timeout);
+    var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+    if (delay > 24) {
+      if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+      if (interval) interval = clearInterval(interval);
+    } else {
+      if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+      frame = 1, setFrame(wake);
+    }
+  }
+
+  var initialRadius = 10,
+      initialAngle = Math.PI * (3 - Math.sqrt(5));
+
+  function forceSimulation(nodes) {
+    var simulation,
+        alpha = 1,
+        alphaMin = 0.001,
+        alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
+        alphaTarget = 0,
+        velocityDecay = 0.6,
+        forces = new Map(),
+        stepper = timer(step),
+        event = dispatch("tick", "end");
+
+    if (nodes == null) nodes = [];
+
+    function step() {
+      tick();
+      event.call("tick", simulation);
+      if (alpha < alphaMin) {
+        stepper.stop();
+        event.call("end", simulation);
+      }
+    }
+
+    function tick(iterations) {
+      var i, n = nodes.length, node;
+
+      if (iterations === undefined) iterations = 1;
+
+      for (var k = 0; k < iterations; ++k) {
+        alpha += (alphaTarget - alpha) * alphaDecay;
+
+        forces.forEach(function(force) {
+          force(alpha);
+        });
+
+        for (i = 0; i < n; ++i) {
+          node = nodes[i];
+          if (node.fx == null) node.x += node.vx *= velocityDecay;
+          else node.x = node.fx, node.vx = 0;
+          if (node.fy == null) node.y += node.vy *= velocityDecay;
+          else node.y = node.fy, node.vy = 0;
+        }
+      }
+
+      return simulation;
+    }
+
+    function initializeNodes() {
+      for (var i = 0, n = nodes.length, node; i < n; ++i) {
+        node = nodes[i], node.index = i;
+        if (node.fx != null) node.x = node.fx;
+        if (node.fy != null) node.y = node.fy;
+        if (isNaN(node.x) || isNaN(node.y)) {
+          var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;
+          node.x = radius * Math.cos(angle);
+          node.y = radius * Math.sin(angle);
+        }
+        if (isNaN(node.vx) || isNaN(node.vy)) {
+          node.vx = node.vy = 0;
+        }
+      }
+    }
+
+    function initializeForce(force) {
+      if (force.initialize) force.initialize(nodes);
+      return force;
+    }
+
+    initializeNodes();
+
+    return simulation = {
+      tick: tick,
+
+      restart: function() {
+        return stepper.restart(step), simulation;
+      },
+
+      stop: function() {
+        return stepper.stop(), simulation;
+      },
+
+      nodes: function(_) {
+        return arguments.length ? (nodes = _, initializeNodes(), forces.forEach(initializeForce), simulation) : nodes;
+      },
+
+      alpha: function(_) {
+        return arguments.length ? (alpha = +_, simulation) : alpha;
+      },
+
+      alphaMin: function(_) {
+        return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
+      },
+
+      alphaDecay: function(_) {
+        return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
+      },
+
+      alphaTarget: function(_) {
+        return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
+      },
+
+      velocityDecay: function(_) {
+        return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
+      },
+
+      force: function(name, _) {
+        return arguments.length > 1 ? ((_ == null ? forces.delete(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
+      },
+
+      find: function(x, y, radius) {
+        var i = 0,
+            n = nodes.length,
+            dx,
+            dy,
+            d2,
+            node,
+            closest;
+
+        if (radius == null) radius = Infinity;
+        else radius *= radius;
+
+        for (i = 0; i < n; ++i) {
+          node = nodes[i];
+          dx = x - node.x;
+          dy = y - node.y;
+          d2 = dx * dx + dy * dy;
+          if (d2 < radius) closest = node, radius = d2;
+        }
+
+        return closest;
+      },
+
+      on: function(name, _) {
+        return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
+      }
+    };
+  }
+
+  // import { test } from './test.js';
+  // console.log("in index.js", test);
+  // test();
+  console.log("in index.js");
+  // import * as fetchJsonp from 'fetch-jsonp';
+  // import { jsonp } from 'jsonp';
+
+  var jsonp = require("jsonp");
+
+  console.log("force", forceSimulation);
+  console.log("fetchJsonp", fetchJsonp);
+
+
+  class Map$1 {
+      constructor (apiurl) {
+          this.apiurl = apiurl;
+      }
+      load (pagetitle) {
+          console.log("Map.load", pagetitle, this.apiurl);
+          jsonpP (this.apiurl).then(data => {
+              console.log("got data", data);
+          }).catch(err => {
+              console.log("ERROR", err);
+          });
+
+      }
+  }
+
+
+
+  // http://erg.activearchives.org/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+  // http://erg.activearchives.org/w/api.php?action=query&prop=info&titles=Main%20Page
+  // Bienvenue_à_l’erg
+  // http://erg.activearchives.org/mw/index.php/Bienvenue_%C3%A0_l%E2%80%99erg
+
+  exports.Map = Map$1;
+
+  return exports;
+
+}({}));
diff --git a/dist/wikimap.js b/dist/wikimap.js
new file mode 100644
index 0000000..7059709
--- /dev/null
+++ b/dist/wikimap.js
@@ -0,0 +1,3108 @@
+var wikimap = (function (exports) {
+  'use strict';
+
+  var xhtml = "http://www.w3.org/1999/xhtml";
+
+  var namespaces = {
+    svg: "http://www.w3.org/2000/svg",
+    xhtml: xhtml,
+    xlink: "http://www.w3.org/1999/xlink",
+    xml: "http://www.w3.org/XML/1998/namespace",
+    xmlns: "http://www.w3.org/2000/xmlns/"
+  };
+
+  function namespace(name) {
+    var prefix = name += "", i = prefix.indexOf(":");
+    if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+    return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
+  }
+
+  function creatorInherit(name) {
+    return function() {
+      var document = this.ownerDocument,
+          uri = this.namespaceURI;
+      return uri === xhtml && document.documentElement.namespaceURI === xhtml
+          ? document.createElement(name)
+          : document.createElementNS(uri, name);
+    };
+  }
+
+  function creatorFixed(fullname) {
+    return function() {
+      return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+    };
+  }
+
+  function creator(name) {
+    var fullname = namespace(name);
+    return (fullname.local
+        ? creatorFixed
+        : creatorInherit)(fullname);
+  }
+
+  function none() {}
+
+  function selector(selector) {
+    return selector == null ? none : function() {
+      return this.querySelector(selector);
+    };
+  }
+
+  function selection_select(select) {
+    if (typeof select !== "function") select = selector(select);
+
+    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+        if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+          if ("__data__" in node) subnode.__data__ = node.__data__;
+          subgroup[i] = subnode;
+        }
+      }
+    }
+
+    return new Selection(subgroups, this._parents);
+  }
+
+  function empty() {
+    return [];
+  }
+
+  function selectorAll(selector) {
+    return selector == null ? empty : function() {
+      return this.querySelectorAll(selector);
+    };
+  }
+
+  function selection_selectAll(select) {
+    if (typeof select !== "function") select = selectorAll(select);
+
+    for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+        if (node = group[i]) {
+          subgroups.push(select.call(node, node.__data__, i, group));
+          parents.push(node);
+        }
+      }
+    }
+
+    return new Selection(subgroups, parents);
+  }
+
+  function matcher(selector) {
+    return function() {
+      return this.matches(selector);
+    };
+  }
+
+  function selection_filter(match) {
+    if (typeof match !== "function") match = matcher(match);
+
+    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+        if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+          subgroup.push(node);
+        }
+      }
+    }
+
+    return new Selection(subgroups, this._parents);
+  }
+
+  function sparse(update) {
+    return new Array(update.length);
+  }
+
+  function selection_enter() {
+    return new Selection(this._enter || this._groups.map(sparse), this._parents);
+  }
+
+  function EnterNode(parent, datum) {
+    this.ownerDocument = parent.ownerDocument;
+    this.namespaceURI = parent.namespaceURI;
+    this._next = null;
+    this._parent = parent;
+    this.__data__ = datum;
+  }
+
+  EnterNode.prototype = {
+    constructor: EnterNode,
+    appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
+    insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
+    querySelector: function(selector) { return this._parent.querySelector(selector); },
+    querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
+  };
+
+  function constant(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  var keyPrefix = "$"; // Protect against keys like “__proto__”.
+
+  function bindIndex(parent, group, enter, update, exit, data) {
+    var i = 0,
+        node,
+        groupLength = group.length,
+        dataLength = data.length;
+
+    // Put any non-null nodes that fit into update.
+    // Put any null nodes into enter.
+    // Put any remaining data into enter.
+    for (; i < dataLength; ++i) {
+      if (node = group[i]) {
+        node.__data__ = data[i];
+        update[i] = node;
+      } else {
+        enter[i] = new EnterNode(parent, data[i]);
+      }
+    }
+
+    // Put any non-null nodes that don’t fit into exit.
+    for (; i < groupLength; ++i) {
+      if (node = group[i]) {
+        exit[i] = node;
+      }
+    }
+  }
+
+  function bindKey(parent, group, enter, update, exit, data, key) {
+    var i,
+        node,
+        nodeByKeyValue = {},
+        groupLength = group.length,
+        dataLength = data.length,
+        keyValues = new Array(groupLength),
+        keyValue;
+
+    // Compute the key for each node.
+    // If multiple nodes have the same key, the duplicates are added to exit.
+    for (i = 0; i < groupLength; ++i) {
+      if (node = group[i]) {
+        keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
+        if (keyValue in nodeByKeyValue) {
+          exit[i] = node;
+        } else {
+          nodeByKeyValue[keyValue] = node;
+        }
+      }
+    }
+
+    // Compute the key for each datum.
+    // If there a node associated with this key, join and add it to update.
+    // If there is not (or the key is a duplicate), add it to enter.
+    for (i = 0; i < dataLength; ++i) {
+      keyValue = keyPrefix + key.call(parent, data[i], i, data);
+      if (node = nodeByKeyValue[keyValue]) {
+        update[i] = node;
+        node.__data__ = data[i];
+        nodeByKeyValue[keyValue] = null;
+      } else {
+        enter[i] = new EnterNode(parent, data[i]);
+      }
+    }
+
+    // Add any remaining nodes that were not bound to data to exit.
+    for (i = 0; i < groupLength; ++i) {
+      if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
+        exit[i] = node;
+      }
+    }
+  }
+
+  function selection_data(value, key) {
+    if (!value) {
+      data = new Array(this.size()), j = -1;
+      this.each(function(d) { data[++j] = d; });
+      return data;
+    }
+
+    var bind = key ? bindKey : bindIndex,
+        parents = this._parents,
+        groups = this._groups;
+
+    if (typeof value !== "function") value = constant(value);
+
+    for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+      var parent = parents[j],
+          group = groups[j],
+          groupLength = group.length,
+          data = value.call(parent, parent && parent.__data__, j, parents),
+          dataLength = data.length,
+          enterGroup = enter[j] = new Array(dataLength),
+          updateGroup = update[j] = new Array(dataLength),
+          exitGroup = exit[j] = new Array(groupLength);
+
+      bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+
+      // Now connect the enter nodes to their following update node, such that
+      // appendChild can insert the materialized enter node before this node,
+      // rather than at the end of the parent node.
+      for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+        if (previous = enterGroup[i0]) {
+          if (i0 >= i1) i1 = i0 + 1;
+          while (!(next = updateGroup[i1]) && ++i1 < dataLength);
+          previous._next = next || null;
+        }
+      }
+    }
+
+    update = new Selection(update, parents);
+    update._enter = enter;
+    update._exit = exit;
+    return update;
+  }
+
+  function selection_exit() {
+    return new Selection(this._exit || this._groups.map(sparse), this._parents);
+  }
+
+  function selection_join(onenter, onupdate, onexit) {
+    var enter = this.enter(), update = this, exit = this.exit();
+    enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
+    if (onupdate != null) update = onupdate(update);
+    if (onexit == null) exit.remove(); else onexit(exit);
+    return enter && update ? enter.merge(update).order() : update;
+  }
+
+  function selection_merge(selection) {
+
+    for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+      for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+        if (node = group0[i] || group1[i]) {
+          merge[i] = node;
+        }
+      }
+    }
+
+    for (; j < m0; ++j) {
+      merges[j] = groups0[j];
+    }
+
+    return new Selection(merges, this._parents);
+  }
+
+  function selection_order() {
+
+    for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+      for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+        if (node = group[i]) {
+          if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
+          next = node;
+        }
+      }
+    }
+
+    return this;
+  }
+
+  function selection_sort(compare) {
+    if (!compare) compare = ascending;
+
+    function compareNode(a, b) {
+      return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+    }
+
+    for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+        if (node = group[i]) {
+          sortgroup[i] = node;
+        }
+      }
+      sortgroup.sort(compareNode);
+    }
+
+    return new Selection(sortgroups, this._parents).order();
+  }
+
+  function ascending(a, b) {
+    return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+  }
+
+  function selection_call() {
+    var callback = arguments[0];
+    arguments[0] = this;
+    callback.apply(null, arguments);
+    return this;
+  }
+
+  function selection_nodes() {
+    var nodes = new Array(this.size()), i = -1;
+    this.each(function() { nodes[++i] = this; });
+    return nodes;
+  }
+
+  function selection_node() {
+
+    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+      for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+        var node = group[i];
+        if (node) return node;
+      }
+    }
+
+    return null;
+  }
+
+  function selection_size() {
+    var size = 0;
+    this.each(function() { ++size; });
+    return size;
+  }
+
+  function selection_empty() {
+    return !this.node();
+  }
+
+  function selection_each(callback) {
+
+    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+      for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+        if (node = group[i]) callback.call(node, node.__data__, i, group);
+      }
+    }
+
+    return this;
+  }
+
+  function attrRemove(name) {
+    return function() {
+      this.removeAttribute(name);
+    };
+  }
+
+  function attrRemoveNS(fullname) {
+    return function() {
+      this.removeAttributeNS(fullname.space, fullname.local);
+    };
+  }
+
+  function attrConstant(name, value) {
+    return function() {
+      this.setAttribute(name, value);
+    };
+  }
+
+  function attrConstantNS(fullname, value) {
+    return function() {
+      this.setAttributeNS(fullname.space, fullname.local, value);
+    };
+  }
+
+  function attrFunction(name, value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) this.removeAttribute(name);
+      else this.setAttribute(name, v);
+    };
+  }
+
+  function attrFunctionNS(fullname, value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
+      else this.setAttributeNS(fullname.space, fullname.local, v);
+    };
+  }
+
+  function selection_attr(name, value) {
+    var fullname = namespace(name);
+
+    if (arguments.length < 2) {
+      var node = this.node();
+      return fullname.local
+          ? node.getAttributeNS(fullname.space, fullname.local)
+          : node.getAttribute(fullname);
+    }
+
+    return this.each((value == null
+        ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
+        ? (fullname.local ? attrFunctionNS : attrFunction)
+        : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
+  }
+
+  function defaultView(node) {
+    return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
+        || (node.document && node) // node is a Window
+        || node.defaultView; // node is a Document
+  }
+
+  function styleRemove(name) {
+    return function() {
+      this.style.removeProperty(name);
+    };
+  }
+
+  function styleConstant(name, value, priority) {
+    return function() {
+      this.style.setProperty(name, value, priority);
+    };
+  }
+
+  function styleFunction(name, value, priority) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) this.style.removeProperty(name);
+      else this.style.setProperty(name, v, priority);
+    };
+  }
+
+  function selection_style(name, value, priority) {
+    return arguments.length > 1
+        ? this.each((value == null
+              ? styleRemove : typeof value === "function"
+              ? styleFunction
+              : styleConstant)(name, value, priority == null ? "" : priority))
+        : styleValue(this.node(), name);
+  }
+
+  function styleValue(node, name) {
+    return node.style.getPropertyValue(name)
+        || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+  }
+
+  function propertyRemove(name) {
+    return function() {
+      delete this[name];
+    };
+  }
+
+  function propertyConstant(name, value) {
+    return function() {
+      this[name] = value;
+    };
+  }
+
+  function propertyFunction(name, value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) delete this[name];
+      else this[name] = v;
+    };
+  }
+
+  function selection_property(name, value) {
+    return arguments.length > 1
+        ? this.each((value == null
+            ? propertyRemove : typeof value === "function"
+            ? propertyFunction
+            : propertyConstant)(name, value))
+        : this.node()[name];
+  }
+
+  function classArray(string) {
+    return string.trim().split(/^|\s+/);
+  }
+
+  function classList(node) {
+    return node.classList || new ClassList(node);
+  }
+
+  function ClassList(node) {
+    this._node = node;
+    this._names = classArray(node.getAttribute("class") || "");
+  }
+
+  ClassList.prototype = {
+    add: function(name) {
+      var i = this._names.indexOf(name);
+      if (i < 0) {
+        this._names.push(name);
+        this._node.setAttribute("class", this._names.join(" "));
+      }
+    },
+    remove: function(name) {
+      var i = this._names.indexOf(name);
+      if (i >= 0) {
+        this._names.splice(i, 1);
+        this._node.setAttribute("class", this._names.join(" "));
+      }
+    },
+    contains: function(name) {
+      return this._names.indexOf(name) >= 0;
+    }
+  };
+
+  function classedAdd(node, names) {
+    var list = classList(node), i = -1, n = names.length;
+    while (++i < n) list.add(names[i]);
+  }
+
+  function classedRemove(node, names) {
+    var list = classList(node), i = -1, n = names.length;
+    while (++i < n) list.remove(names[i]);
+  }
+
+  function classedTrue(names) {
+    return function() {
+      classedAdd(this, names);
+    };
+  }
+
+  function classedFalse(names) {
+    return function() {
+      classedRemove(this, names);
+    };
+  }
+
+  function classedFunction(names, value) {
+    return function() {
+      (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+    };
+  }
+
+  function selection_classed(name, value) {
+    var names = classArray(name + "");
+
+    if (arguments.length < 2) {
+      var list = classList(this.node()), i = -1, n = names.length;
+      while (++i < n) if (!list.contains(names[i])) return false;
+      return true;
+    }
+
+    return this.each((typeof value === "function"
+        ? classedFunction : value
+        ? classedTrue
+        : classedFalse)(names, value));
+  }
+
+  function textRemove() {
+    this.textContent = "";
+  }
+
+  function textConstant(value) {
+    return function() {
+      this.textContent = value;
+    };
+  }
+
+  function textFunction(value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      this.textContent = v == null ? "" : v;
+    };
+  }
+
+  function selection_text(value) {
+    return arguments.length
+        ? this.each(value == null
+            ? textRemove : (typeof value === "function"
+            ? textFunction
+            : textConstant)(value))
+        : this.node().textContent;
+  }
+
+  function htmlRemove() {
+    this.innerHTML = "";
+  }
+
+  function htmlConstant(value) {
+    return function() {
+      this.innerHTML = value;
+    };
+  }
+
+  function htmlFunction(value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      this.innerHTML = v == null ? "" : v;
+    };
+  }
+
+  function selection_html(value) {
+    return arguments.length
+        ? this.each(value == null
+            ? htmlRemove : (typeof value === "function"
+            ? htmlFunction
+            : htmlConstant)(value))
+        : this.node().innerHTML;
+  }
+
+  function raise() {
+    if (this.nextSibling) this.parentNode.appendChild(this);
+  }
+
+  function selection_raise() {
+    return this.each(raise);
+  }
+
+  function lower() {
+    if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+  }
+
+  function selection_lower() {
+    return this.each(lower);
+  }
+
+  function selection_append(name) {
+    var create = typeof name === "function" ? name : creator(name);
+    return this.select(function() {
+      return this.appendChild(create.apply(this, arguments));
+    });
+  }
+
+  function constantNull() {
+    return null;
+  }
+
+  function selection_insert(name, before) {
+    var create = typeof name === "function" ? name : creator(name),
+        select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+    return this.select(function() {
+      return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+    });
+  }
+
+  function remove() {
+    var parent = this.parentNode;
+    if (parent) parent.removeChild(this);
+  }
+
+  function selection_remove() {
+    return this.each(remove);
+  }
+
+  function selection_cloneShallow() {
+    return this.parentNode.insertBefore(this.cloneNode(false), this.nextSibling);
+  }
+
+  function selection_cloneDeep() {
+    return this.parentNode.insertBefore(this.cloneNode(true), this.nextSibling);
+  }
+
+  function selection_clone(deep) {
+    return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+  }
+
+  function selection_datum(value) {
+    return arguments.length
+        ? this.property("__data__", value)
+        : this.node().__data__;
+  }
+
+  var filterEvents = {};
+
+  var event = null;
+
+  if (typeof document !== "undefined") {
+    var element = document.documentElement;
+    if (!("onmouseenter" in element)) {
+      filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
+    }
+  }
+
+  function filterContextListener(listener, index, group) {
+    listener = contextListener(listener, index, group);
+    return function(event) {
+      var related = event.relatedTarget;
+      if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
+        listener.call(this, event);
+      }
+    };
+  }
+
+  function contextListener(listener, index, group) {
+    return function(event1) {
+      var event0 = event; // Events can be reentrant (e.g., focus).
+      event = event1;
+      try {
+        listener.call(this, this.__data__, index, group);
+      } finally {
+        event = event0;
+      }
+    };
+  }
+
+  function parseTypenames(typenames) {
+    return typenames.trim().split(/^|\s+/).map(function(t) {
+      var name = "", i = t.indexOf(".");
+      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+      return {type: t, name: name};
+    });
+  }
+
+  function onRemove(typename) {
+    return function() {
+      var on = this.__on;
+      if (!on) return;
+      for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+        if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+          this.removeEventListener(o.type, o.listener, o.capture);
+        } else {
+          on[++i] = o;
+        }
+      }
+      if (++i) on.length = i;
+      else delete this.__on;
+    };
+  }
+
+  function onAdd(typename, value, capture) {
+    var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
+    return function(d, i, group) {
+      var on = this.__on, o, listener = wrap(value, i, group);
+      if (on) for (var j = 0, m = on.length; j < m; ++j) {
+        if ((o = on[j]).type === typename.type && o.name === typename.name) {
+          this.removeEventListener(o.type, o.listener, o.capture);
+          this.addEventListener(o.type, o.listener = listener, o.capture = capture);
+          o.value = value;
+          return;
+        }
+      }
+      this.addEventListener(typename.type, listener, capture);
+      o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
+      if (!on) this.__on = [o];
+      else on.push(o);
+    };
+  }
+
+  function selection_on(typename, value, capture) {
+    var typenames = parseTypenames(typename + ""), i, n = typenames.length, t;
+
+    if (arguments.length < 2) {
+      var on = this.node().__on;
+      if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+        for (i = 0, o = on[j]; i < n; ++i) {
+          if ((t = typenames[i]).type === o.type && t.name === o.name) {
+            return o.value;
+          }
+        }
+      }
+      return;
+    }
+
+    on = value ? onAdd : onRemove;
+    if (capture == null) capture = false;
+    for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
+    return this;
+  }
+
+  function customEvent(event1, listener, that, args) {
+    var event0 = event;
+    event1.sourceEvent = event;
+    event = event1;
+    try {
+      return listener.apply(that, args);
+    } finally {
+      event = event0;
+    }
+  }
+
+  function dispatchEvent(node, type, params) {
+    var window = defaultView(node),
+        event = window.CustomEvent;
+
+    if (typeof event === "function") {
+      event = new event(type, params);
+    } else {
+      event = window.document.createEvent("Event");
+      if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
+      else event.initEvent(type, false, false);
+    }
+
+    node.dispatchEvent(event);
+  }
+
+  function dispatchConstant(type, params) {
+    return function() {
+      return dispatchEvent(this, type, params);
+    };
+  }
+
+  function dispatchFunction(type, params) {
+    return function() {
+      return dispatchEvent(this, type, params.apply(this, arguments));
+    };
+  }
+
+  function selection_dispatch(type, params) {
+    return this.each((typeof params === "function"
+        ? dispatchFunction
+        : dispatchConstant)(type, params));
+  }
+
+  var root = [null];
+
+  function Selection(groups, parents) {
+    this._groups = groups;
+    this._parents = parents;
+  }
+
+  function selection() {
+    return new Selection([[document.documentElement]], root);
+  }
+
+  Selection.prototype = selection.prototype = {
+    constructor: Selection,
+    select: selection_select,
+    selectAll: selection_selectAll,
+    filter: selection_filter,
+    data: selection_data,
+    enter: selection_enter,
+    exit: selection_exit,
+    join: selection_join,
+    merge: selection_merge,
+    order: selection_order,
+    sort: selection_sort,
+    call: selection_call,
+    nodes: selection_nodes,
+    node: selection_node,
+    size: selection_size,
+    empty: selection_empty,
+    each: selection_each,
+    attr: selection_attr,
+    style: selection_style,
+    property: selection_property,
+    classed: selection_classed,
+    text: selection_text,
+    html: selection_html,
+    raise: selection_raise,
+    lower: selection_lower,
+    append: selection_append,
+    insert: selection_insert,
+    remove: selection_remove,
+    clone: selection_clone,
+    datum: selection_datum,
+    on: selection_on,
+    dispatch: selection_dispatch
+  };
+
+  function select(selector) {
+    return typeof selector === "string"
+        ? new Selection([[document.querySelector(selector)]], [document.documentElement])
+        : new Selection([[selector]], root);
+  }
+
+  function sourceEvent() {
+    var current = event, source;
+    while (source = current.sourceEvent) current = source;
+    return current;
+  }
+
+  function point(node, event) {
+    var svg = node.ownerSVGElement || node;
+
+    if (svg.createSVGPoint) {
+      var point = svg.createSVGPoint();
+      point.x = event.clientX, point.y = event.clientY;
+      point = point.matrixTransform(node.getScreenCTM().inverse());
+      return [point.x, point.y];
+    }
+
+    var rect = node.getBoundingClientRect();
+    return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+  }
+
+  function mouse(node) {
+    var event = sourceEvent();
+    if (event.changedTouches) event = event.changedTouches[0];
+    return point(node, event);
+  }
+
+  function touch(node, touches, identifier) {
+    if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;
+
+    for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
+      if ((touch = touches[i]).identifier === identifier) {
+        return point(node, touch);
+      }
+    }
+
+    return null;
+  }
+
+  var prefix = "$";
+
+  function Map$1() {}
+
+  Map$1.prototype = map.prototype = {
+    constructor: Map$1,
+    has: function(key) {
+      return (prefix + key) in this;
+    },
+    get: function(key) {
+      return this[prefix + key];
+    },
+    set: function(key, value) {
+      this[prefix + key] = value;
+      return this;
+    },
+    remove: function(key) {
+      var property = prefix + key;
+      return property in this && delete this[property];
+    },
+    clear: function() {
+      for (var property in this) if (property[0] === prefix) delete this[property];
+    },
+    keys: function() {
+      var keys = [];
+      for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
+      return keys;
+    },
+    values: function() {
+      var values = [];
+      for (var property in this) if (property[0] === prefix) values.push(this[property]);
+      return values;
+    },
+    entries: function() {
+      var entries = [];
+      for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
+      return entries;
+    },
+    size: function() {
+      var size = 0;
+      for (var property in this) if (property[0] === prefix) ++size;
+      return size;
+    },
+    empty: function() {
+      for (var property in this) if (property[0] === prefix) return false;
+      return true;
+    },
+    each: function(f) {
+      for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
+    }
+  };
+
+  function map(object, f) {
+    var map = new Map$1;
+
+    // Copy constructor.
+    if (object instanceof Map$1) object.each(function(value, key) { map.set(key, value); });
+
+    // Index array by numeric index or specified key function.
+    else if (Array.isArray(object)) {
+      var i = -1,
+          n = object.length,
+          o;
+
+      if (f == null) while (++i < n) map.set(i, object[i]);
+      else while (++i < n) map.set(f(o = object[i], i, object), o);
+    }
+
+    // Convert object to map.
+    else if (object) for (var key in object) map.set(key, object[key]);
+
+    return map;
+  }
+
+  function Set() {}
+
+  var proto = map.prototype;
+
+  Set.prototype = set.prototype = {
+    constructor: Set,
+    has: proto.has,
+    add: function(value) {
+      value += "";
+      this[prefix + value] = value;
+      return this;
+    },
+    remove: proto.remove,
+    clear: proto.clear,
+    values: proto.keys,
+    size: proto.size,
+    empty: proto.empty,
+    each: proto.each
+  };
+
+  function set(object, f) {
+    var set = new Set;
+
+    // Copy constructor.
+    if (object instanceof Set) object.each(function(value) { set.add(value); });
+
+    // Otherwise, assume it’s an array.
+    else if (object) {
+      var i = -1, n = object.length;
+      if (f == null) while (++i < n) set.add(object[i]);
+      else while (++i < n) set.add(f(object[i], i, object));
+    }
+
+    return set;
+  }
+
+  function values(map) {
+    var values = [];
+    for (var key in map) values.push(map[key]);
+    return values;
+  }
+
+  var noop = {value: function() {}};
+
+  function dispatch() {
+    for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+      if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
+      _[t] = [];
+    }
+    return new Dispatch(_);
+  }
+
+  function Dispatch(_) {
+    this._ = _;
+  }
+
+  function parseTypenames$1(typenames, types) {
+    return typenames.trim().split(/^|\s+/).map(function(t) {
+      var name = "", i = t.indexOf(".");
+      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+      if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+      return {type: t, name: name};
+    });
+  }
+
+  Dispatch.prototype = dispatch.prototype = {
+    constructor: Dispatch,
+    on: function(typename, callback) {
+      var _ = this._,
+          T = parseTypenames$1(typename + "", _),
+          t,
+          i = -1,
+          n = T.length;
+
+      // If no callback was specified, return the callback of the given type and name.
+      if (arguments.length < 2) {
+        while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
+        return;
+      }
+
+      // If a type was specified, set the callback for the given type and name.
+      // Otherwise, if a null callback was specified, remove callbacks of the given name.
+      if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+      while (++i < n) {
+        if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);
+        else if (callback == null) for (t in _) _[t] = set$1(_[t], typename.name, null);
+      }
+
+      return this;
+    },
+    copy: function() {
+      var copy = {}, _ = this._;
+      for (var t in _) copy[t] = _[t].slice();
+      return new Dispatch(copy);
+    },
+    call: function(type, that) {
+      if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
+      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+      for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+    },
+    apply: function(type, that, args) {
+      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+      for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+    }
+  };
+
+  function get(type, name) {
+    for (var i = 0, n = type.length, c; i < n; ++i) {
+      if ((c = type[i]).name === name) {
+        return c.value;
+      }
+    }
+  }
+
+  function set$1(type, name, callback) {
+    for (var i = 0, n = type.length; i < n; ++i) {
+      if (type[i].name === name) {
+        type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+        break;
+      }
+    }
+    if (callback != null) type.push({name: name, value: callback});
+    return type;
+  }
+
+  function nopropagation() {
+    event.stopImmediatePropagation();
+  }
+
+  function noevent() {
+    event.preventDefault();
+    event.stopImmediatePropagation();
+  }
+
+  function nodrag(view) {
+    var root = view.document.documentElement,
+        selection = select(view).on("dragstart.drag", noevent, true);
+    if ("onselectstart" in root) {
+      selection.on("selectstart.drag", noevent, true);
+    } else {
+      root.__noselect = root.style.MozUserSelect;
+      root.style.MozUserSelect = "none";
+    }
+  }
+
+  function yesdrag(view, noclick) {
+    var root = view.document.documentElement,
+        selection = select(view).on("dragstart.drag", null);
+    if (noclick) {
+      selection.on("click.drag", noevent, true);
+      setTimeout(function() { selection.on("click.drag", null); }, 0);
+    }
+    if ("onselectstart" in root) {
+      selection.on("selectstart.drag", null);
+    } else {
+      root.style.MozUserSelect = root.__noselect;
+      delete root.__noselect;
+    }
+  }
+
+  function constant$1(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
+    this.target = target;
+    this.type = type;
+    this.subject = subject;
+    this.identifier = id;
+    this.active = active;
+    this.x = x;
+    this.y = y;
+    this.dx = dx;
+    this.dy = dy;
+    this._ = dispatch;
+  }
+
+  DragEvent.prototype.on = function() {
+    var value = this._.on.apply(this._, arguments);
+    return value === this._ ? this : value;
+  };
+
+  // Ignore right-click, since that should open the context menu.
+  function defaultFilter() {
+    return !event.button;
+  }
+
+  function defaultContainer() {
+    return this.parentNode;
+  }
+
+  function defaultSubject(d) {
+    return d == null ? {x: event.x, y: event.y} : d;
+  }
+
+  function defaultTouchable() {
+    return "ontouchstart" in this;
+  }
+
+  function drag() {
+    var filter = defaultFilter,
+        container = defaultContainer,
+        subject = defaultSubject,
+        touchable = defaultTouchable,
+        gestures = {},
+        listeners = dispatch("start", "drag", "end"),
+        active = 0,
+        mousedownx,
+        mousedowny,
+        mousemoving,
+        touchending,
+        clickDistance2 = 0;
+
+    function drag(selection) {
+      selection
+          .on("mousedown.drag", mousedowned)
+        .filter(touchable)
+          .on("touchstart.drag", touchstarted)
+          .on("touchmove.drag", touchmoved)
+          .on("touchend.drag touchcancel.drag", touchended)
+          .style("touch-action", "none")
+          .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+    }
+
+    function mousedowned() {
+      if (touchending || !filter.apply(this, arguments)) return;
+      var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
+      if (!gesture) return;
+      select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+      nodrag(event.view);
+      nopropagation();
+      mousemoving = false;
+      mousedownx = event.clientX;
+      mousedowny = event.clientY;
+      gesture("start");
+    }
+
+    function mousemoved() {
+      noevent();
+      if (!mousemoving) {
+        var dx = event.clientX - mousedownx, dy = event.clientY - mousedowny;
+        mousemoving = dx * dx + dy * dy > clickDistance2;
+      }
+      gestures.mouse("drag");
+    }
+
+    function mouseupped() {
+      select(event.view).on("mousemove.drag mouseup.drag", null);
+      yesdrag(event.view, mousemoving);
+      noevent();
+      gestures.mouse("end");
+    }
+
+    function touchstarted() {
+      if (!filter.apply(this, arguments)) return;
+      var touches = event.changedTouches,
+          c = container.apply(this, arguments),
+          n = touches.length, i, gesture;
+
+      for (i = 0; i < n; ++i) {
+        if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {
+          nopropagation();
+          gesture("start");
+        }
+      }
+    }
+
+    function touchmoved() {
+      var touches = event.changedTouches,
+          n = touches.length, i, gesture;
+
+      for (i = 0; i < n; ++i) {
+        if (gesture = gestures[touches[i].identifier]) {
+          noevent();
+          gesture("drag");
+        }
+      }
+    }
+
+    function touchended() {
+      var touches = event.changedTouches,
+          n = touches.length, i, gesture;
+
+      if (touchending) clearTimeout(touchending);
+      touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
+      for (i = 0; i < n; ++i) {
+        if (gesture = gestures[touches[i].identifier]) {
+          nopropagation();
+          gesture("end");
+        }
+      }
+    }
+
+    function beforestart(id, container, point, that, args) {
+      var p = point(container, id), s, dx, dy,
+          sublisteners = listeners.copy();
+
+      if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
+        if ((event.subject = s = subject.apply(that, args)) == null) return false;
+        dx = s.x - p[0] || 0;
+        dy = s.y - p[1] || 0;
+        return true;
+      })) return;
+
+      return function gesture(type) {
+        var p0 = p, n;
+        switch (type) {
+          case "start": gestures[id] = gesture, n = active++; break;
+          case "end": delete gestures[id], --active; // nobreak
+          case "drag": p = point(container, id), n = active; break;
+        }
+        customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
+      };
+    }
+
+    drag.filter = function(_) {
+      return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
+    };
+
+    drag.container = function(_) {
+      return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
+    };
+
+    drag.subject = function(_) {
+      return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
+    };
+
+    drag.touchable = function(_) {
+      return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
+    };
+
+    drag.on = function() {
+      var value = listeners.on.apply(listeners, arguments);
+      return value === listeners ? drag : value;
+    };
+
+    drag.clickDistance = function(_) {
+      return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+    };
+
+    return drag;
+  }
+
+  function tree_add(d) {
+    var x = +this._x.call(null, d),
+        y = +this._y.call(null, d);
+    return add(this.cover(x, y), x, y, d);
+  }
+
+  function add(tree, x, y, d) {
+    if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points
+
+    var parent,
+        node = tree._root,
+        leaf = {data: d},
+        x0 = tree._x0,
+        y0 = tree._y0,
+        x1 = tree._x1,
+        y1 = tree._y1,
+        xm,
+        ym,
+        xp,
+        yp,
+        right,
+        bottom,
+        i,
+        j;
+
+    // If the tree is empty, initialize the root as a leaf.
+    if (!node) return tree._root = leaf, tree;
+
+    // Find the existing leaf for the new point, or add it.
+    while (node.length) {
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+      if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
+    }
+
+    // Is the new point is exactly coincident with the existing point?
+    xp = +tree._x.call(null, node.data);
+    yp = +tree._y.call(null, node.data);
+    if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;
+
+    // Otherwise, split the leaf node until the old and new point are separated.
+    do {
+      parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+    } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
+    return parent[j] = node, parent[i] = leaf, tree;
+  }
+
+  function addAll(data) {
+    var d, i, n = data.length,
+        x,
+        y,
+        xz = new Array(n),
+        yz = new Array(n),
+        x0 = Infinity,
+        y0 = Infinity,
+        x1 = -Infinity,
+        y1 = -Infinity;
+
+    // Compute the points and their extent.
+    for (i = 0; i < n; ++i) {
+      if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
+      xz[i] = x;
+      yz[i] = y;
+      if (x < x0) x0 = x;
+      if (x > x1) x1 = x;
+      if (y < y0) y0 = y;
+      if (y > y1) y1 = y;
+    }
+
+    // If there were no (valid) points, abort.
+    if (x0 > x1 || y0 > y1) return this;
+
+    // Expand the tree to cover the new points.
+    this.cover(x0, y0).cover(x1, y1);
+
+    // Add the new points.
+    for (i = 0; i < n; ++i) {
+      add(this, xz[i], yz[i], data[i]);
+    }
+
+    return this;
+  }
+
+  function tree_cover(x, y) {
+    if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points
+
+    var x0 = this._x0,
+        y0 = this._y0,
+        x1 = this._x1,
+        y1 = this._y1;
+
+    // If the quadtree has no extent, initialize them.
+    // Integer extent are necessary so that if we later double the extent,
+    // the existing quadrant boundaries don’t change due to floating point error!
+    if (isNaN(x0)) {
+      x1 = (x0 = Math.floor(x)) + 1;
+      y1 = (y0 = Math.floor(y)) + 1;
+    }
+
+    // Otherwise, double repeatedly to cover.
+    else {
+      var z = x1 - x0,
+          node = this._root,
+          parent,
+          i;
+
+      while (x0 > x || x >= x1 || y0 > y || y >= y1) {
+        i = (y < y0) << 1 | (x < x0);
+        parent = new Array(4), parent[i] = node, node = parent, z *= 2;
+        switch (i) {
+          case 0: x1 = x0 + z, y1 = y0 + z; break;
+          case 1: x0 = x1 - z, y1 = y0 + z; break;
+          case 2: x1 = x0 + z, y0 = y1 - z; break;
+          case 3: x0 = x1 - z, y0 = y1 - z; break;
+        }
+      }
+
+      if (this._root && this._root.length) this._root = node;
+    }
+
+    this._x0 = x0;
+    this._y0 = y0;
+    this._x1 = x1;
+    this._y1 = y1;
+    return this;
+  }
+
+  function tree_data() {
+    var data = [];
+    this.visit(function(node) {
+      if (!node.length) do data.push(node.data); while (node = node.next)
+    });
+    return data;
+  }
+
+  function tree_extent(_) {
+    return arguments.length
+        ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
+        : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
+  }
+
+  function Quad(node, x0, y0, x1, y1) {
+    this.node = node;
+    this.x0 = x0;
+    this.y0 = y0;
+    this.x1 = x1;
+    this.y1 = y1;
+  }
+
+  function tree_find(x, y, radius) {
+    var data,
+        x0 = this._x0,
+        y0 = this._y0,
+        x1,
+        y1,
+        x2,
+        y2,
+        x3 = this._x1,
+        y3 = this._y1,
+        quads = [],
+        node = this._root,
+        q,
+        i;
+
+    if (node) quads.push(new Quad(node, x0, y0, x3, y3));
+    if (radius == null) radius = Infinity;
+    else {
+      x0 = x - radius, y0 = y - radius;
+      x3 = x + radius, y3 = y + radius;
+      radius *= radius;
+    }
+
+    while (q = quads.pop()) {
+
+      // Stop searching if this quadrant can’t contain a closer node.
+      if (!(node = q.node)
+          || (x1 = q.x0) > x3
+          || (y1 = q.y0) > y3
+          || (x2 = q.x1) < x0
+          || (y2 = q.y1) < y0) continue;
+
+      // Bisect the current quadrant.
+      if (node.length) {
+        var xm = (x1 + x2) / 2,
+            ym = (y1 + y2) / 2;
+
+        quads.push(
+          new Quad(node[3], xm, ym, x2, y2),
+          new Quad(node[2], x1, ym, xm, y2),
+          new Quad(node[1], xm, y1, x2, ym),
+          new Quad(node[0], x1, y1, xm, ym)
+        );
+
+        // Visit the closest quadrant first.
+        if (i = (y >= ym) << 1 | (x >= xm)) {
+          q = quads[quads.length - 1];
+          quads[quads.length - 1] = quads[quads.length - 1 - i];
+          quads[quads.length - 1 - i] = q;
+        }
+      }
+
+      // Visit this point. (Visiting coincident points isn’t necessary!)
+      else {
+        var dx = x - +this._x.call(null, node.data),
+            dy = y - +this._y.call(null, node.data),
+            d2 = dx * dx + dy * dy;
+        if (d2 < radius) {
+          var d = Math.sqrt(radius = d2);
+          x0 = x - d, y0 = y - d;
+          x3 = x + d, y3 = y + d;
+          data = node.data;
+        }
+      }
+    }
+
+    return data;
+  }
+
+  function tree_remove(d) {
+    if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points
+
+    var parent,
+        node = this._root,
+        retainer,
+        previous,
+        next,
+        x0 = this._x0,
+        y0 = this._y0,
+        x1 = this._x1,
+        y1 = this._y1,
+        x,
+        y,
+        xm,
+        ym,
+        right,
+        bottom,
+        i,
+        j;
+
+    // If the tree is empty, initialize the root as a leaf.
+    if (!node) return this;
+
+    // Find the leaf node for the point.
+    // While descending, also retain the deepest parent with a non-removed sibling.
+    if (node.length) while (true) {
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+      if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
+      if (!node.length) break;
+      if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
+    }
+
+    // Find the point to remove.
+    while (node.data !== d) if (!(previous = node, node = node.next)) return this;
+    if (next = node.next) delete node.next;
+
+    // If there are multiple coincident points, remove just the point.
+    if (previous) return (next ? previous.next = next : delete previous.next), this;
+
+    // If this is the root point, remove it.
+    if (!parent) return this._root = next, this;
+
+    // Remove this leaf.
+    next ? parent[i] = next : delete parent[i];
+
+    // If the parent now contains exactly one leaf, collapse superfluous parents.
+    if ((node = parent[0] || parent[1] || parent[2] || parent[3])
+        && node === (parent[3] || parent[2] || parent[1] || parent[0])
+        && !node.length) {
+      if (retainer) retainer[j] = node;
+      else this._root = node;
+    }
+
+    return this;
+  }
+
+  function removeAll(data) {
+    for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
+    return this;
+  }
+
+  function tree_root() {
+    return this._root;
+  }
+
+  function tree_size() {
+    var size = 0;
+    this.visit(function(node) {
+      if (!node.length) do ++size; while (node = node.next)
+    });
+    return size;
+  }
+
+  function tree_visit(callback) {
+    var quads = [], q, node = this._root, child, x0, y0, x1, y1;
+    if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
+    while (q = quads.pop()) {
+      if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
+        var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+        if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+        if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+        if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+        if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+      }
+    }
+    return this;
+  }
+
+  function tree_visitAfter(callback) {
+    var quads = [], next = [], q;
+    if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
+    while (q = quads.pop()) {
+      var node = q.node;
+      if (node.length) {
+        var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+        if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+        if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+        if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+        if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+      }
+      next.push(q);
+    }
+    while (q = next.pop()) {
+      callback(q.node, q.x0, q.y0, q.x1, q.y1);
+    }
+    return this;
+  }
+
+  function defaultX(d) {
+    return d[0];
+  }
+
+  function tree_x(_) {
+    return arguments.length ? (this._x = _, this) : this._x;
+  }
+
+  function defaultY(d) {
+    return d[1];
+  }
+
+  function tree_y(_) {
+    return arguments.length ? (this._y = _, this) : this._y;
+  }
+
+  function quadtree(nodes, x, y) {
+    var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
+    return nodes == null ? tree : tree.addAll(nodes);
+  }
+
+  function Quadtree(x, y, x0, y0, x1, y1) {
+    this._x = x;
+    this._y = y;
+    this._x0 = x0;
+    this._y0 = y0;
+    this._x1 = x1;
+    this._y1 = y1;
+    this._root = undefined;
+  }
+
+  function leaf_copy(leaf) {
+    var copy = {data: leaf.data}, next = copy;
+    while (leaf = leaf.next) next = next.next = {data: leaf.data};
+    return copy;
+  }
+
+  var treeProto = quadtree.prototype = Quadtree.prototype;
+
+  treeProto.copy = function() {
+    var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
+        node = this._root,
+        nodes,
+        child;
+
+    if (!node) return copy;
+
+    if (!node.length) return copy._root = leaf_copy(node), copy;
+
+    nodes = [{source: node, target: copy._root = new Array(4)}];
+    while (node = nodes.pop()) {
+      for (var i = 0; i < 4; ++i) {
+        if (child = node.source[i]) {
+          if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
+          else node.target[i] = leaf_copy(child);
+        }
+      }
+    }
+
+    return copy;
+  };
+
+  treeProto.add = tree_add;
+  treeProto.addAll = addAll;
+  treeProto.cover = tree_cover;
+  treeProto.data = tree_data;
+  treeProto.extent = tree_extent;
+  treeProto.find = tree_find;
+  treeProto.remove = tree_remove;
+  treeProto.removeAll = removeAll;
+  treeProto.root = tree_root;
+  treeProto.size = tree_size;
+  treeProto.visit = tree_visit;
+  treeProto.visitAfter = tree_visitAfter;
+  treeProto.x = tree_x;
+  treeProto.y = tree_y;
+
+  function constant$2(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  function jiggle() {
+    return (Math.random() - 0.5) * 1e-6;
+  }
+
+  function index(d) {
+    return d.index;
+  }
+
+  function find(nodeById, nodeId) {
+    var node = nodeById.get(nodeId);
+    if (!node) throw new Error("missing: " + nodeId);
+    return node;
+  }
+
+  function forceLink(links) {
+    var id = index,
+        strength = defaultStrength,
+        strengths,
+        distance = constant$2(30),
+        distances,
+        nodes,
+        count,
+        bias,
+        iterations = 1;
+
+    if (links == null) links = [];
+
+    function defaultStrength(link) {
+      return 1 / Math.min(count[link.source.index], count[link.target.index]);
+    }
+
+    function force(alpha) {
+      for (var k = 0, n = links.length; k < iterations; ++k) {
+        for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
+          link = links[i], source = link.source, target = link.target;
+          x = target.x + target.vx - source.x - source.vx || jiggle();
+          y = target.y + target.vy - source.y - source.vy || jiggle();
+          l = Math.sqrt(x * x + y * y);
+          l = (l - distances[i]) / l * alpha * strengths[i];
+          x *= l, y *= l;
+          target.vx -= x * (b = bias[i]);
+          target.vy -= y * b;
+          source.vx += x * (b = 1 - b);
+          source.vy += y * b;
+        }
+      }
+    }
+
+    function initialize() {
+      if (!nodes) return;
+
+      var i,
+          n = nodes.length,
+          m = links.length,
+          nodeById = new Map(nodes.map((d, i) => [id(d, i, nodes), d])),
+          link;
+
+      for (i = 0, count = new Array(n); i < m; ++i) {
+        link = links[i], link.index = i;
+        if (typeof link.source !== "object") link.source = find(nodeById, link.source);
+        if (typeof link.target !== "object") link.target = find(nodeById, link.target);
+        count[link.source.index] = (count[link.source.index] || 0) + 1;
+        count[link.target.index] = (count[link.target.index] || 0) + 1;
+      }
+
+      for (i = 0, bias = new Array(m); i < m; ++i) {
+        link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
+      }
+
+      strengths = new Array(m), initializeStrength();
+      distances = new Array(m), initializeDistance();
+    }
+
+    function initializeStrength() {
+      if (!nodes) return;
+
+      for (var i = 0, n = links.length; i < n; ++i) {
+        strengths[i] = +strength(links[i], i, links);
+      }
+    }
+
+    function initializeDistance() {
+      if (!nodes) return;
+
+      for (var i = 0, n = links.length; i < n; ++i) {
+        distances[i] = +distance(links[i], i, links);
+      }
+    }
+
+    force.initialize = function(_) {
+      nodes = _;
+      initialize();
+    };
+
+    force.links = function(_) {
+      return arguments.length ? (links = _, initialize(), force) : links;
+    };
+
+    force.id = function(_) {
+      return arguments.length ? (id = _, force) : id;
+    };
+
+    force.iterations = function(_) {
+      return arguments.length ? (iterations = +_, force) : iterations;
+    };
+
+    force.strength = function(_) {
+      return arguments.length ? (strength = typeof _ === "function" ? _ : constant$2(+_), initializeStrength(), force) : strength;
+    };
+
+    force.distance = function(_) {
+      return arguments.length ? (distance = typeof _ === "function" ? _ : constant$2(+_), initializeDistance(), force) : distance;
+    };
+
+    return force;
+  }
+
+  var frame = 0, // is an animation frame pending?
+      timeout = 0, // is a timeout pending?
+      interval = 0, // are any timers active?
+      pokeDelay = 1000, // how frequently we check for clock skew
+      taskHead,
+      taskTail,
+      clockLast = 0,
+      clockNow = 0,
+      clockSkew = 0,
+      clock = typeof performance === "object" && performance.now ? performance : Date,
+      setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+
+  function now() {
+    return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+  }
+
+  function clearNow() {
+    clockNow = 0;
+  }
+
+  function Timer() {
+    this._call =
+    this._time =
+    this._next = null;
+  }
+
+  Timer.prototype = timer.prototype = {
+    constructor: Timer,
+    restart: function(callback, delay, time) {
+      if (typeof callback !== "function") throw new TypeError("callback is not a function");
+      time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
+      if (!this._next && taskTail !== this) {
+        if (taskTail) taskTail._next = this;
+        else taskHead = this;
+        taskTail = this;
+      }
+      this._call = callback;
+      this._time = time;
+      sleep();
+    },
+    stop: function() {
+      if (this._call) {
+        this._call = null;
+        this._time = Infinity;
+        sleep();
+      }
+    }
+  };
+
+  function timer(callback, delay, time) {
+    var t = new Timer;
+    t.restart(callback, delay, time);
+    return t;
+  }
+
+  function timerFlush() {
+    now(); // Get the current time, if not already set.
+    ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+    var t = taskHead, e;
+    while (t) {
+      if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+      t = t._next;
+    }
+    --frame;
+  }
+
+  function wake() {
+    clockNow = (clockLast = clock.now()) + clockSkew;
+    frame = timeout = 0;
+    try {
+      timerFlush();
+    } finally {
+      frame = 0;
+      nap();
+      clockNow = 0;
+    }
+  }
+
+  function poke() {
+    var now = clock.now(), delay = now - clockLast;
+    if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+  }
+
+  function nap() {
+    var t0, t1 = taskHead, t2, time = Infinity;
+    while (t1) {
+      if (t1._call) {
+        if (time > t1._time) time = t1._time;
+        t0 = t1, t1 = t1._next;
+      } else {
+        t2 = t1._next, t1._next = null;
+        t1 = t0 ? t0._next = t2 : taskHead = t2;
+      }
+    }
+    taskTail = t0;
+    sleep(time);
+  }
+
+  function sleep(time) {
+    if (frame) return; // Soonest alarm already set, or will be.
+    if (timeout) timeout = clearTimeout(timeout);
+    var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+    if (delay > 24) {
+      if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+      if (interval) interval = clearInterval(interval);
+    } else {
+      if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+      frame = 1, setFrame(wake);
+    }
+  }
+
+  function x(d) {
+    return d.x;
+  }
+
+  function y(d) {
+    return d.y;
+  }
+
+  var initialRadius = 10,
+      initialAngle = Math.PI * (3 - Math.sqrt(5));
+
+  function forceSimulation(nodes) {
+    var simulation,
+        alpha = 1,
+        alphaMin = 0.001,
+        alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
+        alphaTarget = 0,
+        velocityDecay = 0.6,
+        forces = new Map(),
+        stepper = timer(step),
+        event = dispatch("tick", "end");
+
+    if (nodes == null) nodes = [];
+
+    function step() {
+      tick();
+      event.call("tick", simulation);
+      if (alpha < alphaMin) {
+        stepper.stop();
+        event.call("end", simulation);
+      }
+    }
+
+    function tick(iterations) {
+      var i, n = nodes.length, node;
+
+      if (iterations === undefined) iterations = 1;
+
+      for (var k = 0; k < iterations; ++k) {
+        alpha += (alphaTarget - alpha) * alphaDecay;
+
+        forces.forEach(function(force) {
+          force(alpha);
+        });
+
+        for (i = 0; i < n; ++i) {
+          node = nodes[i];
+          if (node.fx == null) node.x += node.vx *= velocityDecay;
+          else node.x = node.fx, node.vx = 0;
+          if (node.fy == null) node.y += node.vy *= velocityDecay;
+          else node.y = node.fy, node.vy = 0;
+        }
+      }
+
+      return simulation;
+    }
+
+    function initializeNodes() {
+      for (var i = 0, n = nodes.length, node; i < n; ++i) {
+        node = nodes[i], node.index = i;
+        if (node.fx != null) node.x = node.fx;
+        if (node.fy != null) node.y = node.fy;
+        if (isNaN(node.x) || isNaN(node.y)) {
+          var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;
+          node.x = radius * Math.cos(angle);
+          node.y = radius * Math.sin(angle);
+        }
+        if (isNaN(node.vx) || isNaN(node.vy)) {
+          node.vx = node.vy = 0;
+        }
+      }
+    }
+
+    function initializeForce(force) {
+      if (force.initialize) force.initialize(nodes);
+      return force;
+    }
+
+    initializeNodes();
+
+    return simulation = {
+      tick: tick,
+
+      restart: function() {
+        return stepper.restart(step), simulation;
+      },
+
+      stop: function() {
+        return stepper.stop(), simulation;
+      },
+
+      nodes: function(_) {
+        return arguments.length ? (nodes = _, initializeNodes(), forces.forEach(initializeForce), simulation) : nodes;
+      },
+
+      alpha: function(_) {
+        return arguments.length ? (alpha = +_, simulation) : alpha;
+      },
+
+      alphaMin: function(_) {
+        return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
+      },
+
+      alphaDecay: function(_) {
+        return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
+      },
+
+      alphaTarget: function(_) {
+        return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
+      },
+
+      velocityDecay: function(_) {
+        return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
+      },
+
+      force: function(name, _) {
+        return arguments.length > 1 ? ((_ == null ? forces.delete(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
+      },
+
+      find: function(x, y, radius) {
+        var i = 0,
+            n = nodes.length,
+            dx,
+            dy,
+            d2,
+            node,
+            closest;
+
+        if (radius == null) radius = Infinity;
+        else radius *= radius;
+
+        for (i = 0; i < n; ++i) {
+          node = nodes[i];
+          dx = x - node.x;
+          dy = y - node.y;
+          d2 = dx * dx + dy * dy;
+          if (d2 < radius) closest = node, radius = d2;
+        }
+
+        return closest;
+      },
+
+      on: function(name, _) {
+        return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
+      }
+    };
+  }
+
+  function forceManyBody() {
+    var nodes,
+        node,
+        alpha,
+        strength = constant$2(-30),
+        strengths,
+        distanceMin2 = 1,
+        distanceMax2 = Infinity,
+        theta2 = 0.81;
+
+    function force(_) {
+      var i, n = nodes.length, tree = quadtree(nodes, x, y).visitAfter(accumulate);
+      for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
+    }
+
+    function initialize() {
+      if (!nodes) return;
+      var i, n = nodes.length, node;
+      strengths = new Array(n);
+      for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
+    }
+
+    function accumulate(quad) {
+      var strength = 0, q, c, weight = 0, x, y, i;
+
+      // For internal nodes, accumulate forces from child quadrants.
+      if (quad.length) {
+        for (x = y = i = 0; i < 4; ++i) {
+          if ((q = quad[i]) && (c = Math.abs(q.value))) {
+            strength += q.value, weight += c, x += c * q.x, y += c * q.y;
+          }
+        }
+        quad.x = x / weight;
+        quad.y = y / weight;
+      }
+
+      // For leaf nodes, accumulate forces from coincident quadrants.
+      else {
+        q = quad;
+        q.x = q.data.x;
+        q.y = q.data.y;
+        do strength += strengths[q.data.index];
+        while (q = q.next);
+      }
+
+      quad.value = strength;
+    }
+
+    function apply(quad, x1, _, x2) {
+      if (!quad.value) return true;
+
+      var x = quad.x - node.x,
+          y = quad.y - node.y,
+          w = x2 - x1,
+          l = x * x + y * y;
+
+      // Apply the Barnes-Hut approximation if possible.
+      // Limit forces for very close nodes; randomize direction if coincident.
+      if (w * w / theta2 < l) {
+        if (l < distanceMax2) {
+          if (x === 0) x = jiggle(), l += x * x;
+          if (y === 0) y = jiggle(), l += y * y;
+          if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+          node.vx += x * quad.value * alpha / l;
+          node.vy += y * quad.value * alpha / l;
+        }
+        return true;
+      }
+
+      // Otherwise, process points directly.
+      else if (quad.length || l >= distanceMax2) return;
+
+      // Limit forces for very close nodes; randomize direction if coincident.
+      if (quad.data !== node || quad.next) {
+        if (x === 0) x = jiggle(), l += x * x;
+        if (y === 0) y = jiggle(), l += y * y;
+        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+      }
+
+      do if (quad.data !== node) {
+        w = strengths[quad.data.index] * alpha / l;
+        node.vx += x * w;
+        node.vy += y * w;
+      } while (quad = quad.next);
+    }
+
+    force.initialize = function(_) {
+      nodes = _;
+      initialize();
+    };
+
+    force.strength = function(_) {
+      return arguments.length ? (strength = typeof _ === "function" ? _ : constant$2(+_), initialize(), force) : strength;
+    };
+
+    force.distanceMin = function(_) {
+      return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
+    };
+
+    force.distanceMax = function(_) {
+      return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
+    };
+
+    force.theta = function(_) {
+      return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
+    };
+
+    return force;
+  }
+
+  function forceRadial(radius, x, y) {
+    var nodes,
+        strength = constant$2(0.1),
+        strengths,
+        radiuses;
+
+    if (typeof radius !== "function") radius = constant$2(+radius);
+    if (x == null) x = 0;
+    if (y == null) y = 0;
+
+    function force(alpha) {
+      for (var i = 0, n = nodes.length; i < n; ++i) {
+        var node = nodes[i],
+            dx = node.x - x || 1e-6,
+            dy = node.y - y || 1e-6,
+            r = Math.sqrt(dx * dx + dy * dy),
+            k = (radiuses[i] - r) * strengths[i] * alpha / r;
+        node.vx += dx * k;
+        node.vy += dy * k;
+      }
+    }
+
+    function initialize() {
+      if (!nodes) return;
+      var i, n = nodes.length;
+      strengths = new Array(n);
+      radiuses = new Array(n);
+      for (i = 0; i < n; ++i) {
+        radiuses[i] = +radius(nodes[i], i, nodes);
+        strengths[i] = isNaN(radiuses[i]) ? 0 : +strength(nodes[i], i, nodes);
+      }
+    }
+
+    force.initialize = function(_) {
+      nodes = _, initialize();
+    };
+
+    force.strength = function(_) {
+      return arguments.length ? (strength = typeof _ === "function" ? _ : constant$2(+_), initialize(), force) : strength;
+    };
+
+    force.radius = function(_) {
+      return arguments.length ? (radius = typeof _ === "function" ? _ : constant$2(+_), initialize(), force) : radius;
+    };
+
+    force.x = function(_) {
+      return arguments.length ? (x = +_, force) : x;
+    };
+
+    force.y = function(_) {
+      return arguments.length ? (y = +_, force) : y;
+    };
+
+    return force;
+  }
+
+  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+  function createCommonjsModule(fn, module) {
+  	return module = { exports: {} }, fn(module, module.exports), module.exports;
+  }
+
+  var fetchJsonp = createCommonjsModule(function (module, exports) {
+  (function (global, factory) {
+    {
+      factory(exports, module);
+    }
+  })(commonjsGlobal, function (exports, module) {
+
+    var defaultOptions = {
+      timeout: 5000,
+      jsonpCallback: 'callback',
+      jsonpCallbackFunction: null
+    };
+
+    function generateCallbackFunction() {
+      return 'jsonp_' + Date.now() + '_' + Math.ceil(Math.random() * 100000);
+    }
+
+    function clearFunction(functionName) {
+      // IE8 throws an exception when you try to delete a property on window
+      // http://stackoverflow.com/a/1824228/751089
+      try {
+        delete window[functionName];
+      } catch (e) {
+        window[functionName] = undefined;
+      }
+    }
+
+    function removeScript(scriptId) {
+      var script = document.getElementById(scriptId);
+      if (script) {
+        document.getElementsByTagName('head')[0].removeChild(script);
+      }
+    }
+
+    function fetchJsonp(_url) {
+      var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
+
+      // to avoid param reassign
+      var url = _url;
+      var timeout = options.timeout || defaultOptions.timeout;
+      var jsonpCallback = options.jsonpCallback || defaultOptions.jsonpCallback;
+
+      var timeoutId = undefined;
+
+      return new Promise(function (resolve, reject) {
+        var callbackFunction = options.jsonpCallbackFunction || generateCallbackFunction();
+        var scriptId = jsonpCallback + '_' + callbackFunction;
+
+        window[callbackFunction] = function (response) {
+          resolve({
+            ok: true,
+            // keep consistent with fetch API
+            json: function json() {
+              return Promise.resolve(response);
+            }
+          });
+
+          if (timeoutId) clearTimeout(timeoutId);
+
+          removeScript(scriptId);
+
+          clearFunction(callbackFunction);
+        };
+
+        // Check if the user set their own params, and if not add a ? to start a list of params
+        url += url.indexOf('?') === -1 ? '?' : '&';
+
+        var jsonpScript = document.createElement('script');
+        jsonpScript.setAttribute('src', '' + url + jsonpCallback + '=' + callbackFunction);
+        if (options.charset) {
+          jsonpScript.setAttribute('charset', options.charset);
+        }
+        jsonpScript.id = scriptId;
+        document.getElementsByTagName('head')[0].appendChild(jsonpScript);
+
+        timeoutId = setTimeout(function () {
+          reject(new Error('JSONP request to ' + _url + ' timed out'));
+
+          clearFunction(callbackFunction);
+          removeScript(scriptId);
+          window[callbackFunction] = function () {
+            clearFunction(callbackFunction);
+          };
+        }, timeout);
+
+        // Caught if got 404/500
+        jsonpScript.onerror = function () {
+          reject(new Error('JSONP request to ' + _url + ' failed'));
+
+          clearFunction(callbackFunction);
+          removeScript(scriptId);
+          if (timeoutId) clearTimeout(timeoutId);
+        };
+      });
+    }
+
+    // export as global function
+    /*
+    let local;
+    if (typeof global !== 'undefined') {
+      local = global;
+    } else if (typeof self !== 'undefined') {
+      local = self;
+    } else {
+      try {
+        local = Function('return this')();
+      } catch (e) {
+        throw new Error('polyfill failed because global object is unavailable in this environment');
+      }
+    }
+    local.fetchJsonp = fetchJsonp;
+    */
+
+    module.exports = fetchJsonp;
+  });
+  });
+
+  var NS = {
+      main: 0,
+      discussion: 1,
+      template: 10,
+      category: 14,
+      news: 3106,
+      web: 3116
+  };
+
+  class Wiki {
+      constructor (apiurl) {
+          this.apiurl = apiurl;
+          this.pages_by_title = {};
+          this.ns_names = {};
+          for (var key in NS) {
+              var nsid = NS[key];
+              this.ns_names[nsid] = key;
+          }
+      }
+      get_page_by_title (title) {
+          var p = this.pages_by_title[title];
+          if (p) {
+              return p;
+          } else {
+              p = new Page(this, {title: title, ns: 0});
+              this.pages_by_title[title] = p;
+              return p; 
+          }
+      }
+      page_for_object (n, merge_data) {
+          if (merge_data === undefined) { merge_data = true; }
+          var title = n.title,
+              p = this.pages_by_title[title];
+          if (p) {
+              if (merge_data) { p.merge_data(n); }
+              return p;
+          } else {
+              p = new Page(this, n);
+              this.pages_by_title[title] = p;
+              return p; 
+          }
+      }
+      get_ns_classname (nsid) {
+          // console.log("get_ns_classname", nsid, this.ns_names[nsid]);
+          var ret = this.ns_names[nsid];
+          console.log("classname", ret);
+          if (ret === undefined) { console.log("warning classname undefined for ns", nsid); }
+          return ret;
+      }
+      union (p1, p2) {
+          var union = map(p1, d=>d.title);
+          for (var i=0, l=p2.length; i<l; i++) {
+              var x = p2[i];
+              union.set(x.title, x);
+          }
+          return union.values();
+      }
+  }
+
+  class Page {
+      constructor (wiki, node) {
+          this.wiki = wiki;
+          this.merge_data(node);
+      }
+      url () {
+          // return this.wiki.apiurl.replace("api.php", "index.php")+"/"+encodeURIComponent(this.title);
+          return this.wiki.apiurl.replace("api.php", "index.php")+"/"+encodeURIComponent(this.title);
+      }
+      merge_data (node) {
+          for (var key in node) {
+              if (node.hasOwnProperty(key)) {
+                  this[key] = node[key];
+              }
+          }        
+      }
+
+      // api.php?action=query&prop=categories&titles=Albert%20Einstein
+      async get_prop (pname, prefix) {
+          var ret = [];
+          var url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop="+pname+"&titles="+encodeURIComponent(this.title);
+          while (true) {
+              var data = await fetchJsonp(url);
+              var json = await data.json();
+              // console.log("BACKLINKS.RAW", json);
+              // filter REDIRECTS + Discussion pages (ns==1)
+              if (json.query.pages[0]) {
+                  var p = json.query.pages[0];
+                  // extract any missing page info
+                  if (p.ns && !this.ns) { this.ns = p.ns; }
+                  if (p.pageid && !this.pageid) { this.pageid = p.pageid; }
+              }
+              if (json.query.pages[0][pname]) {
+                  ret.push.apply(ret, json.query.pages[0][pname]);
+              }
+              if (!json.continue) { break; }
+              url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop="+pname+"&"+prefix+"continue="+json.continue[prefix+"continue"]+"&titles="+encodeURIComponent(this.title);
+          }
+          ret = ret.map(x => this.wiki.page_for_object(x));
+          // console.log("get_backlinks", ret);
+          console.log("get_prop", pname, prefix, ret);
+          return ret;
+      }
+      async get_links () {
+          return await this.get_prop("links", "pl");
+          // // http://localhost/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+          // var ret = [];
+          // var url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop=links&titles="+encodeURIComponent(this.title);
+          // while (true) {
+          //     var data = await fetchJsonp(url);
+          //     var json = await data.json();
+          //     // console.log("JSON", json);
+          //     if (json.query.pages[0]) {
+          //         var p = json.query.pages[0];
+          //         // extract any missing page info
+          //         if (p.ns && !this.ns) { this.ns = p.ns; }
+          //         if (p.pageid && !this.pageid) { this.pageid = p.pageid; }
+          //     }
+          //     if (json.query.pages[0].links) {
+          //         ret.push.apply(ret, json.query.pages[0].links);
+          //     }
+          //     if (!json.continue) { break; }
+          //     url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop=links&plcontinue="+json.continue.plcontinue+"&titles="+encodeURIComponent(this.title);
+          // }
+          // ret = ret.map(x => this.wiki.page_for_object(x));
+          // // map these to page objects
+          // return ret;
+      }
+      async get_linkshere () {
+          return await this.get_prop("linkshere", "lh");
+      }
+      async get_list () {        
+          // http://localhost/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+          var ret = [];
+          var url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&list=backlinks&bltitle="+encodeURIComponent(this.title);
+          while (true) {
+              var data = await fetchJsonp(url);
+              var json = await data.json();
+              // console.log("BACKLINKS.RAW", json);
+              // filter REDIRECTS + Discussion pages (ns==1)
+              var backlinks = json.query.backlinks;
+              // backlink = backlinks.filter(x => (!x.redirect && x.ns != 1);
+              ret.push.apply(ret, backlinks);
+              if (!json.continue) { break; }
+              url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&list=backlinks&blcontinue="+json.continue.blcontinue+"&bltitle="+encodeURIComponent(this.title);
+          }
+          ret = ret.map(x => this.wiki.page_for_object(x));
+          // console.log("get_backlinks", ret);
+          return ret;
+      }
+  }
+
+  var eventemitter3 = createCommonjsModule(function (module) {
+
+  var has = Object.prototype.hasOwnProperty
+    , prefix = '~';
+
+  /**
+   * Constructor to create a storage for our `EE` objects.
+   * An `Events` instance is a plain object whose properties are event names.
+   *
+   * @constructor
+   * @private
+   */
+  function Events() {}
+
+  //
+  // We try to not inherit from `Object.prototype`. In some engines creating an
+  // instance in this way is faster than calling `Object.create(null)` directly.
+  // If `Object.create(null)` is not supported we prefix the event names with a
+  // character to make sure that the built-in object properties are not
+  // overridden or used as an attack vector.
+  //
+  if (Object.create) {
+    Events.prototype = Object.create(null);
+
+    //
+    // This hack is needed because the `__proto__` property is still inherited in
+    // some old browsers like Android 4, iPhone 5.1, Opera 11 and Safari 5.
+    //
+    if (!new Events().__proto__) prefix = false;
+  }
+
+  /**
+   * Representation of a single event listener.
+   *
+   * @param {Function} fn The listener function.
+   * @param {*} context The context to invoke the listener with.
+   * @param {Boolean} [once=false] Specify if the listener is a one-time listener.
+   * @constructor
+   * @private
+   */
+  function EE(fn, context, once) {
+    this.fn = fn;
+    this.context = context;
+    this.once = once || false;
+  }
+
+  /**
+   * Add a listener for a given event.
+   *
+   * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn The listener function.
+   * @param {*} context The context to invoke the listener with.
+   * @param {Boolean} once Specify if the listener is a one-time listener.
+   * @returns {EventEmitter}
+   * @private
+   */
+  function addListener(emitter, event, fn, context, once) {
+    if (typeof fn !== 'function') {
+      throw new TypeError('The listener must be a function');
+    }
+
+    var listener = new EE(fn, context || emitter, once)
+      , evt = prefix ? prefix + event : event;
+
+    if (!emitter._events[evt]) emitter._events[evt] = listener, emitter._eventsCount++;
+    else if (!emitter._events[evt].fn) emitter._events[evt].push(listener);
+    else emitter._events[evt] = [emitter._events[evt], listener];
+
+    return emitter;
+  }
+
+  /**
+   * Clear event by name.
+   *
+   * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+   * @param {(String|Symbol)} evt The Event name.
+   * @private
+   */
+  function clearEvent(emitter, evt) {
+    if (--emitter._eventsCount === 0) emitter._events = new Events();
+    else delete emitter._events[evt];
+  }
+
+  /**
+   * Minimal `EventEmitter` interface that is molded against the Node.js
+   * `EventEmitter` interface.
+   *
+   * @constructor
+   * @public
+   */
+  function EventEmitter() {
+    this._events = new Events();
+    this._eventsCount = 0;
+  }
+
+  /**
+   * Return an array listing the events for which the emitter has registered
+   * listeners.
+   *
+   * @returns {Array}
+   * @public
+   */
+  EventEmitter.prototype.eventNames = function eventNames() {
+    var names = []
+      , events
+      , name;
+
+    if (this._eventsCount === 0) return names;
+
+    for (name in (events = this._events)) {
+      if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
+    }
+
+    if (Object.getOwnPropertySymbols) {
+      return names.concat(Object.getOwnPropertySymbols(events));
+    }
+
+    return names;
+  };
+
+  /**
+   * Return the listeners registered for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @returns {Array} The registered listeners.
+   * @public
+   */
+  EventEmitter.prototype.listeners = function listeners(event) {
+    var evt = prefix ? prefix + event : event
+      , handlers = this._events[evt];
+
+    if (!handlers) return [];
+    if (handlers.fn) return [handlers.fn];
+
+    for (var i = 0, l = handlers.length, ee = new Array(l); i < l; i++) {
+      ee[i] = handlers[i].fn;
+    }
+
+    return ee;
+  };
+
+  /**
+   * Return the number of listeners listening to a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @returns {Number} The number of listeners.
+   * @public
+   */
+  EventEmitter.prototype.listenerCount = function listenerCount(event) {
+    var evt = prefix ? prefix + event : event
+      , listeners = this._events[evt];
+
+    if (!listeners) return 0;
+    if (listeners.fn) return 1;
+    return listeners.length;
+  };
+
+  /**
+   * Calls each of the listeners registered for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @returns {Boolean} `true` if the event had listeners, else `false`.
+   * @public
+   */
+  EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
+    var evt = prefix ? prefix + event : event;
+
+    if (!this._events[evt]) return false;
+
+    var listeners = this._events[evt]
+      , len = arguments.length
+      , args
+      , i;
+
+    if (listeners.fn) {
+      if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);
+
+      switch (len) {
+        case 1: return listeners.fn.call(listeners.context), true;
+        case 2: return listeners.fn.call(listeners.context, a1), true;
+        case 3: return listeners.fn.call(listeners.context, a1, a2), true;
+        case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
+        case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
+        case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
+      }
+
+      for (i = 1, args = new Array(len -1); i < len; i++) {
+        args[i - 1] = arguments[i];
+      }
+
+      listeners.fn.apply(listeners.context, args);
+    } else {
+      var length = listeners.length
+        , j;
+
+      for (i = 0; i < length; i++) {
+        if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);
+
+        switch (len) {
+          case 1: listeners[i].fn.call(listeners[i].context); break;
+          case 2: listeners[i].fn.call(listeners[i].context, a1); break;
+          case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
+          case 4: listeners[i].fn.call(listeners[i].context, a1, a2, a3); break;
+          default:
+            if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
+              args[j - 1] = arguments[j];
+            }
+
+            listeners[i].fn.apply(listeners[i].context, args);
+        }
+      }
+    }
+
+    return true;
+  };
+
+  /**
+   * Add a listener for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn The listener function.
+   * @param {*} [context=this] The context to invoke the listener with.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.on = function on(event, fn, context) {
+    return addListener(this, event, fn, context, false);
+  };
+
+  /**
+   * Add a one-time listener for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn The listener function.
+   * @param {*} [context=this] The context to invoke the listener with.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.once = function once(event, fn, context) {
+    return addListener(this, event, fn, context, true);
+  };
+
+  /**
+   * Remove the listeners of a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn Only remove the listeners that match this function.
+   * @param {*} context Only remove the listeners that have this context.
+   * @param {Boolean} once Only remove one-time listeners.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
+    var evt = prefix ? prefix + event : event;
+
+    if (!this._events[evt]) return this;
+    if (!fn) {
+      clearEvent(this, evt);
+      return this;
+    }
+
+    var listeners = this._events[evt];
+
+    if (listeners.fn) {
+      if (
+        listeners.fn === fn &&
+        (!once || listeners.once) &&
+        (!context || listeners.context === context)
+      ) {
+        clearEvent(this, evt);
+      }
+    } else {
+      for (var i = 0, events = [], length = listeners.length; i < length; i++) {
+        if (
+          listeners[i].fn !== fn ||
+          (once && !listeners[i].once) ||
+          (context && listeners[i].context !== context)
+        ) {
+          events.push(listeners[i]);
+        }
+      }
+
+      //
+      // Reset the array, or remove it completely if we have no more listeners.
+      //
+      if (events.length) this._events[evt] = events.length === 1 ? events[0] : events;
+      else clearEvent(this, evt);
+    }
+
+    return this;
+  };
+
+  /**
+   * Remove all listeners, or those of the specified event.
+   *
+   * @param {(String|Symbol)} [event] The event name.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
+    var evt;
+
+    if (event) {
+      evt = prefix ? prefix + event : event;
+      if (this._events[evt]) clearEvent(this, evt);
+    } else {
+      this._events = new Events();
+      this._eventsCount = 0;
+    }
+
+    return this;
+  };
+
+  //
+  // Alias methods names because people roll like that.
+  //
+  EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+  EventEmitter.prototype.addListener = EventEmitter.prototype.on;
+
+  //
+  // Expose the prefix.
+  //
+  EventEmitter.prefixed = prefix;
+
+  //
+  // Allow `EventEmitter` to be imported as module namespace.
+  //
+  EventEmitter.EventEmitter = EventEmitter;
+
+  //
+  // Expose the module.
+  //
+  {
+    module.exports = EventEmitter;
+  }
+  });
+
+  class Map$2 {
+
+      constructor (apiurl) {
+          var width = 600,
+              height = 600;
+          this.wiki = new Wiki(apiurl);
+          this.events = new eventemitter3();
+          this.active_page = null;
+          // this.nodes = {};
+          this.simulation = forceSimulation()
+              .velocityDecay(0.1)
+              .force("link", forceLink().id(d => d.title))
+              .force("charge", forceManyBody())
+              .force("radial", forceRadial(180, width/2, height/2));
+              // .force("center", forceCenter(width / 2, height / 2));
+          this.svg = null;
+          this.historylinks = {};
+      }
+
+      on (message, callback, context) {
+          this.events.on(message, callback, context);
+      }
+
+      init_svg (svg) {
+          this.svg = select(svg || "svg");
+          this.linksg = this.svg.append("g")
+              .attr("class", "links");
+          this.nodesg = this.svg.append("g")
+              .attr("class", "nodes");
+      }
+
+      dragstarted (d) {
+          if (!event.active) this.simulation.alphaTarget(0.3).restart();
+          d.fx = d.x;
+          d.fy = d.y;
+      }
+
+      dragged (d) {
+          d.fx = event.x;
+          d.fy = event.y;
+      }
+
+      dragended(d) {
+          if (!event.active) this.simulation.alphaTarget(0);
+          d.fx = null;
+          d.fy = null;
+      }
+
+      update_graph (graph) {
+          // console.log("UPDATE GRAPH", graph.nodes.length, graph.links.length);
+          var that = this,
+              link = this.linksg.selectAll("line")
+                  .data(graph.links, function (d) { return that.link_key(d.source.title, d.target.title) });
+          var link_enter = link.enter()
+              .append("line");
+
+          link.exit().each(d => {
+              d.source.linked = false;
+              d.target.linked = false;
+          }).remove();
+          
+          link_enter.merge(link).each(d => {
+                  d.source.linked = true;
+                  d.target.linked = true;
+              });
+
+          var node = this.nodesg
+              .selectAll("g.page")
+              .data(graph.nodes, function (d) { return d.title });
+
+          var node_enter = node.enter().append("g")
+              .attr("class", d=>"page "+this.wiki.get_ns_classname(d.ns))
+              .on("click", d => {
+                  this.set_active_node(d.title);
+              })
+              .on("mouseover", function (d) {
+                  // console.log("mouseover", this);
+                  select(this).classed("mouse", true);
+              })
+              .on("mouseout", function (d) {
+                  // console.log("mouseout", this);
+                  select(this).classed("mouse", false);
+              })
+              .call(drag()
+                  .on("start", this.dragstarted.bind(this))
+                  .on("drag", this.dragged.bind(this))
+                  .on("end", this.dragended.bind(this)));
+
+          node_enter.append("circle")
+              .attr("r", 6);
+
+          node_enter.append("text")
+              .text(d => d.title)
+              .attr("x", 10);
+
+          //node_enter.append("title")
+          //   .text(function(d) { return d.title; });
+
+          node = node_enter.merge(node);
+          link = link_enter.merge(link);
+
+          node.classed("active", d=>d.active);
+
+          this.simulation
+              .nodes(graph.nodes)
+              .on("tick", ticked);
+
+          this.simulation.force("link")
+              .links(graph.links);
+
+          this.simulation.force("radial").radius(d => d.linked ? null : 200);
+
+          function ticked() {
+              link
+                  .attr("x1", function(d) { return d.source.x; })
+                  .attr("y1", function(d) { return d.source.y; })
+                  .attr("x2", function(d) { return d.target.x; })
+                  .attr("y2", function(d) { return d.target.y; });
+
+              // node
+              //     .attr("cx", function(d) { return d.x; })
+              //     .attr("cy", function(d) { return d.y; });
+              node
+                  .attr("transform", d => `translate(${d.x},${d.y})`);
+          }
+          this.simulation.alphaTarget(0.3).restart();
+      }
+
+      link_key (a, b) {
+          return (a < b) ? ("link_"+a+"_"+b) : ("link_"+b+"_"+a);
+      }
+
+      walk (node, links) {
+          var links_seen = {};
+          // var node = this.ensure_node(nodename);
+          node.all_links.forEach(x => {
+              var link_key = this.link_key(node.title, x.title);
+              if (!links_seen[link_key]) {
+                  links.push({source: node, target: x});
+                  links_seen[link_key] = true;
+              }
+          });
+          return;
+      }
+
+      set_active_title (title) {
+          this.set_active_node(title);
+      }
+
+      async set_active_node (page) {
+          if (typeof(page) === "string") {
+              page = this.wiki.get_page_by_title(page);
+          }
+
+          if (page === this.active_page) {
+              // console.log("page is already the active page", page, this.active_page);
+              return;
+          }
+          if (this.active_page) {
+              this.active_page.active = false;
+              var lkey = this.link_key(this.active_page.title, page.title),
+                  source = (this.active_page.title < page.title) ? this.active_page : page,
+                  target = (this.active_page.title < page.title) ? page : this.active_page;
+              this.historylinks[lkey] = {source: source, target: target};
+          }
+          // n = this.ensure_node(pagetitle);
+          
+          this.active_page = page;
+          this.active_page.active = true;
+          this.load(this.active_page);
+          this.events.emit("page", this.active_page.title);
+      }
+
+      async load (page) {
+          console.log("loading", page.title);
+          var links = await page.get_links(),
+              backlinks = await page.get_linkshere(),
+              alllinks = this.wiki.union(links, backlinks);
+
+          page.all_links = alllinks;
+          // console.log("alllinks", alllinks);
+          var graph = {};
+
+          graph.nodes = values(this.wiki.pages_by_title);
+          graph.links = [];
+          this.walk(page, graph.links);
+          // activate historylinks
+          values(this.historylinks).forEach(x => {
+              graph.links.push(x);
+          });
+          // graph.links = titles.map(t => ({source: pagetitle, target: t}));
+          this.update_graph(graph);
+          // console.log("GOT DATA", titles);
+          // return titles;
+      }
+  }
+
+
+
+  // http://erg.activearchives.org/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+  // http://erg.activearchives.org/w/api.php?action=query&prop=info&titles=Main%20Page
+  // Bienvenue_à_l’erg
+  // http://erg.activearchives.org/mw/index.php/Bienvenue_%C3%A0_l%E2%80%99erg
+
+  exports.Map = Map$2;
+
+  return exports;
+
+}({}));
diff --git a/dist/wikimaptotal.js b/dist/wikimaptotal.js
new file mode 100644
index 0000000..9f0d502
--- /dev/null
+++ b/dist/wikimaptotal.js
@@ -0,0 +1,5550 @@
+var wikimap = (function (exports) {
+  'use strict';
+
+  var xhtml = "http://www.w3.org/1999/xhtml";
+
+  var namespaces = {
+    svg: "http://www.w3.org/2000/svg",
+    xhtml: xhtml,
+    xlink: "http://www.w3.org/1999/xlink",
+    xml: "http://www.w3.org/XML/1998/namespace",
+    xmlns: "http://www.w3.org/2000/xmlns/"
+  };
+
+  function namespace(name) {
+    var prefix = name += "", i = prefix.indexOf(":");
+    if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+    return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
+  }
+
+  function creatorInherit(name) {
+    return function() {
+      var document = this.ownerDocument,
+          uri = this.namespaceURI;
+      return uri === xhtml && document.documentElement.namespaceURI === xhtml
+          ? document.createElement(name)
+          : document.createElementNS(uri, name);
+    };
+  }
+
+  function creatorFixed(fullname) {
+    return function() {
+      return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+    };
+  }
+
+  function creator(name) {
+    var fullname = namespace(name);
+    return (fullname.local
+        ? creatorFixed
+        : creatorInherit)(fullname);
+  }
+
+  function none() {}
+
+  function selector(selector) {
+    return selector == null ? none : function() {
+      return this.querySelector(selector);
+    };
+  }
+
+  function selection_select(select) {
+    if (typeof select !== "function") select = selector(select);
+
+    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+        if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+          if ("__data__" in node) subnode.__data__ = node.__data__;
+          subgroup[i] = subnode;
+        }
+      }
+    }
+
+    return new Selection(subgroups, this._parents);
+  }
+
+  function empty() {
+    return [];
+  }
+
+  function selectorAll(selector) {
+    return selector == null ? empty : function() {
+      return this.querySelectorAll(selector);
+    };
+  }
+
+  function selection_selectAll(select) {
+    if (typeof select !== "function") select = selectorAll(select);
+
+    for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+        if (node = group[i]) {
+          subgroups.push(select.call(node, node.__data__, i, group));
+          parents.push(node);
+        }
+      }
+    }
+
+    return new Selection(subgroups, parents);
+  }
+
+  function matcher(selector) {
+    return function() {
+      return this.matches(selector);
+    };
+  }
+
+  function selection_filter(match) {
+    if (typeof match !== "function") match = matcher(match);
+
+    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+        if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+          subgroup.push(node);
+        }
+      }
+    }
+
+    return new Selection(subgroups, this._parents);
+  }
+
+  function sparse(update) {
+    return new Array(update.length);
+  }
+
+  function selection_enter() {
+    return new Selection(this._enter || this._groups.map(sparse), this._parents);
+  }
+
+  function EnterNode(parent, datum) {
+    this.ownerDocument = parent.ownerDocument;
+    this.namespaceURI = parent.namespaceURI;
+    this._next = null;
+    this._parent = parent;
+    this.__data__ = datum;
+  }
+
+  EnterNode.prototype = {
+    constructor: EnterNode,
+    appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
+    insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
+    querySelector: function(selector) { return this._parent.querySelector(selector); },
+    querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
+  };
+
+  function constant(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  var keyPrefix = "$"; // Protect against keys like “__proto__”.
+
+  function bindIndex(parent, group, enter, update, exit, data) {
+    var i = 0,
+        node,
+        groupLength = group.length,
+        dataLength = data.length;
+
+    // Put any non-null nodes that fit into update.
+    // Put any null nodes into enter.
+    // Put any remaining data into enter.
+    for (; i < dataLength; ++i) {
+      if (node = group[i]) {
+        node.__data__ = data[i];
+        update[i] = node;
+      } else {
+        enter[i] = new EnterNode(parent, data[i]);
+      }
+    }
+
+    // Put any non-null nodes that don’t fit into exit.
+    for (; i < groupLength; ++i) {
+      if (node = group[i]) {
+        exit[i] = node;
+      }
+    }
+  }
+
+  function bindKey(parent, group, enter, update, exit, data, key) {
+    var i,
+        node,
+        nodeByKeyValue = {},
+        groupLength = group.length,
+        dataLength = data.length,
+        keyValues = new Array(groupLength),
+        keyValue;
+
+    // Compute the key for each node.
+    // If multiple nodes have the same key, the duplicates are added to exit.
+    for (i = 0; i < groupLength; ++i) {
+      if (node = group[i]) {
+        keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
+        if (keyValue in nodeByKeyValue) {
+          exit[i] = node;
+        } else {
+          nodeByKeyValue[keyValue] = node;
+        }
+      }
+    }
+
+    // Compute the key for each datum.
+    // If there a node associated with this key, join and add it to update.
+    // If there is not (or the key is a duplicate), add it to enter.
+    for (i = 0; i < dataLength; ++i) {
+      keyValue = keyPrefix + key.call(parent, data[i], i, data);
+      if (node = nodeByKeyValue[keyValue]) {
+        update[i] = node;
+        node.__data__ = data[i];
+        nodeByKeyValue[keyValue] = null;
+      } else {
+        enter[i] = new EnterNode(parent, data[i]);
+      }
+    }
+
+    // Add any remaining nodes that were not bound to data to exit.
+    for (i = 0; i < groupLength; ++i) {
+      if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
+        exit[i] = node;
+      }
+    }
+  }
+
+  function selection_data(value, key) {
+    if (!value) {
+      data = new Array(this.size()), j = -1;
+      this.each(function(d) { data[++j] = d; });
+      return data;
+    }
+
+    var bind = key ? bindKey : bindIndex,
+        parents = this._parents,
+        groups = this._groups;
+
+    if (typeof value !== "function") value = constant(value);
+
+    for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+      var parent = parents[j],
+          group = groups[j],
+          groupLength = group.length,
+          data = value.call(parent, parent && parent.__data__, j, parents),
+          dataLength = data.length,
+          enterGroup = enter[j] = new Array(dataLength),
+          updateGroup = update[j] = new Array(dataLength),
+          exitGroup = exit[j] = new Array(groupLength);
+
+      bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+
+      // Now connect the enter nodes to their following update node, such that
+      // appendChild can insert the materialized enter node before this node,
+      // rather than at the end of the parent node.
+      for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+        if (previous = enterGroup[i0]) {
+          if (i0 >= i1) i1 = i0 + 1;
+          while (!(next = updateGroup[i1]) && ++i1 < dataLength);
+          previous._next = next || null;
+        }
+      }
+    }
+
+    update = new Selection(update, parents);
+    update._enter = enter;
+    update._exit = exit;
+    return update;
+  }
+
+  function selection_exit() {
+    return new Selection(this._exit || this._groups.map(sparse), this._parents);
+  }
+
+  function selection_join(onenter, onupdate, onexit) {
+    var enter = this.enter(), update = this, exit = this.exit();
+    enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
+    if (onupdate != null) update = onupdate(update);
+    if (onexit == null) exit.remove(); else onexit(exit);
+    return enter && update ? enter.merge(update).order() : update;
+  }
+
+  function selection_merge(selection) {
+
+    for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+      for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+        if (node = group0[i] || group1[i]) {
+          merge[i] = node;
+        }
+      }
+    }
+
+    for (; j < m0; ++j) {
+      merges[j] = groups0[j];
+    }
+
+    return new Selection(merges, this._parents);
+  }
+
+  function selection_order() {
+
+    for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+      for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+        if (node = group[i]) {
+          if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
+          next = node;
+        }
+      }
+    }
+
+    return this;
+  }
+
+  function selection_sort(compare) {
+    if (!compare) compare = ascending;
+
+    function compareNode(a, b) {
+      return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+    }
+
+    for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+        if (node = group[i]) {
+          sortgroup[i] = node;
+        }
+      }
+      sortgroup.sort(compareNode);
+    }
+
+    return new Selection(sortgroups, this._parents).order();
+  }
+
+  function ascending(a, b) {
+    return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+  }
+
+  function selection_call() {
+    var callback = arguments[0];
+    arguments[0] = this;
+    callback.apply(null, arguments);
+    return this;
+  }
+
+  function selection_nodes() {
+    var nodes = new Array(this.size()), i = -1;
+    this.each(function() { nodes[++i] = this; });
+    return nodes;
+  }
+
+  function selection_node() {
+
+    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+      for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+        var node = group[i];
+        if (node) return node;
+      }
+    }
+
+    return null;
+  }
+
+  function selection_size() {
+    var size = 0;
+    this.each(function() { ++size; });
+    return size;
+  }
+
+  function selection_empty() {
+    return !this.node();
+  }
+
+  function selection_each(callback) {
+
+    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+      for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+        if (node = group[i]) callback.call(node, node.__data__, i, group);
+      }
+    }
+
+    return this;
+  }
+
+  function attrRemove(name) {
+    return function() {
+      this.removeAttribute(name);
+    };
+  }
+
+  function attrRemoveNS(fullname) {
+    return function() {
+      this.removeAttributeNS(fullname.space, fullname.local);
+    };
+  }
+
+  function attrConstant(name, value) {
+    return function() {
+      this.setAttribute(name, value);
+    };
+  }
+
+  function attrConstantNS(fullname, value) {
+    return function() {
+      this.setAttributeNS(fullname.space, fullname.local, value);
+    };
+  }
+
+  function attrFunction(name, value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) this.removeAttribute(name);
+      else this.setAttribute(name, v);
+    };
+  }
+
+  function attrFunctionNS(fullname, value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
+      else this.setAttributeNS(fullname.space, fullname.local, v);
+    };
+  }
+
+  function selection_attr(name, value) {
+    var fullname = namespace(name);
+
+    if (arguments.length < 2) {
+      var node = this.node();
+      return fullname.local
+          ? node.getAttributeNS(fullname.space, fullname.local)
+          : node.getAttribute(fullname);
+    }
+
+    return this.each((value == null
+        ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
+        ? (fullname.local ? attrFunctionNS : attrFunction)
+        : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
+  }
+
+  function defaultView(node) {
+    return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
+        || (node.document && node) // node is a Window
+        || node.defaultView; // node is a Document
+  }
+
+  function styleRemove(name) {
+    return function() {
+      this.style.removeProperty(name);
+    };
+  }
+
+  function styleConstant(name, value, priority) {
+    return function() {
+      this.style.setProperty(name, value, priority);
+    };
+  }
+
+  function styleFunction(name, value, priority) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) this.style.removeProperty(name);
+      else this.style.setProperty(name, v, priority);
+    };
+  }
+
+  function selection_style(name, value, priority) {
+    return arguments.length > 1
+        ? this.each((value == null
+              ? styleRemove : typeof value === "function"
+              ? styleFunction
+              : styleConstant)(name, value, priority == null ? "" : priority))
+        : styleValue(this.node(), name);
+  }
+
+  function styleValue(node, name) {
+    return node.style.getPropertyValue(name)
+        || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+  }
+
+  function propertyRemove(name) {
+    return function() {
+      delete this[name];
+    };
+  }
+
+  function propertyConstant(name, value) {
+    return function() {
+      this[name] = value;
+    };
+  }
+
+  function propertyFunction(name, value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      if (v == null) delete this[name];
+      else this[name] = v;
+    };
+  }
+
+  function selection_property(name, value) {
+    return arguments.length > 1
+        ? this.each((value == null
+            ? propertyRemove : typeof value === "function"
+            ? propertyFunction
+            : propertyConstant)(name, value))
+        : this.node()[name];
+  }
+
+  function classArray(string) {
+    return string.trim().split(/^|\s+/);
+  }
+
+  function classList(node) {
+    return node.classList || new ClassList(node);
+  }
+
+  function ClassList(node) {
+    this._node = node;
+    this._names = classArray(node.getAttribute("class") || "");
+  }
+
+  ClassList.prototype = {
+    add: function(name) {
+      var i = this._names.indexOf(name);
+      if (i < 0) {
+        this._names.push(name);
+        this._node.setAttribute("class", this._names.join(" "));
+      }
+    },
+    remove: function(name) {
+      var i = this._names.indexOf(name);
+      if (i >= 0) {
+        this._names.splice(i, 1);
+        this._node.setAttribute("class", this._names.join(" "));
+      }
+    },
+    contains: function(name) {
+      return this._names.indexOf(name) >= 0;
+    }
+  };
+
+  function classedAdd(node, names) {
+    var list = classList(node), i = -1, n = names.length;
+    while (++i < n) list.add(names[i]);
+  }
+
+  function classedRemove(node, names) {
+    var list = classList(node), i = -1, n = names.length;
+    while (++i < n) list.remove(names[i]);
+  }
+
+  function classedTrue(names) {
+    return function() {
+      classedAdd(this, names);
+    };
+  }
+
+  function classedFalse(names) {
+    return function() {
+      classedRemove(this, names);
+    };
+  }
+
+  function classedFunction(names, value) {
+    return function() {
+      (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+    };
+  }
+
+  function selection_classed(name, value) {
+    var names = classArray(name + "");
+
+    if (arguments.length < 2) {
+      var list = classList(this.node()), i = -1, n = names.length;
+      while (++i < n) if (!list.contains(names[i])) return false;
+      return true;
+    }
+
+    return this.each((typeof value === "function"
+        ? classedFunction : value
+        ? classedTrue
+        : classedFalse)(names, value));
+  }
+
+  function textRemove() {
+    this.textContent = "";
+  }
+
+  function textConstant(value) {
+    return function() {
+      this.textContent = value;
+    };
+  }
+
+  function textFunction(value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      this.textContent = v == null ? "" : v;
+    };
+  }
+
+  function selection_text(value) {
+    return arguments.length
+        ? this.each(value == null
+            ? textRemove : (typeof value === "function"
+            ? textFunction
+            : textConstant)(value))
+        : this.node().textContent;
+  }
+
+  function htmlRemove() {
+    this.innerHTML = "";
+  }
+
+  function htmlConstant(value) {
+    return function() {
+      this.innerHTML = value;
+    };
+  }
+
+  function htmlFunction(value) {
+    return function() {
+      var v = value.apply(this, arguments);
+      this.innerHTML = v == null ? "" : v;
+    };
+  }
+
+  function selection_html(value) {
+    return arguments.length
+        ? this.each(value == null
+            ? htmlRemove : (typeof value === "function"
+            ? htmlFunction
+            : htmlConstant)(value))
+        : this.node().innerHTML;
+  }
+
+  function raise() {
+    if (this.nextSibling) this.parentNode.appendChild(this);
+  }
+
+  function selection_raise() {
+    return this.each(raise);
+  }
+
+  function lower() {
+    if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+  }
+
+  function selection_lower() {
+    return this.each(lower);
+  }
+
+  function selection_append(name) {
+    var create = typeof name === "function" ? name : creator(name);
+    return this.select(function() {
+      return this.appendChild(create.apply(this, arguments));
+    });
+  }
+
+  function constantNull() {
+    return null;
+  }
+
+  function selection_insert(name, before) {
+    var create = typeof name === "function" ? name : creator(name),
+        select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+    return this.select(function() {
+      return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+    });
+  }
+
+  function remove() {
+    var parent = this.parentNode;
+    if (parent) parent.removeChild(this);
+  }
+
+  function selection_remove() {
+    return this.each(remove);
+  }
+
+  function selection_cloneShallow() {
+    return this.parentNode.insertBefore(this.cloneNode(false), this.nextSibling);
+  }
+
+  function selection_cloneDeep() {
+    return this.parentNode.insertBefore(this.cloneNode(true), this.nextSibling);
+  }
+
+  function selection_clone(deep) {
+    return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+  }
+
+  function selection_datum(value) {
+    return arguments.length
+        ? this.property("__data__", value)
+        : this.node().__data__;
+  }
+
+  var filterEvents = {};
+
+  var event = null;
+
+  if (typeof document !== "undefined") {
+    var element = document.documentElement;
+    if (!("onmouseenter" in element)) {
+      filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
+    }
+  }
+
+  function filterContextListener(listener, index, group) {
+    listener = contextListener(listener, index, group);
+    return function(event) {
+      var related = event.relatedTarget;
+      if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
+        listener.call(this, event);
+      }
+    };
+  }
+
+  function contextListener(listener, index, group) {
+    return function(event1) {
+      var event0 = event; // Events can be reentrant (e.g., focus).
+      event = event1;
+      try {
+        listener.call(this, this.__data__, index, group);
+      } finally {
+        event = event0;
+      }
+    };
+  }
+
+  function parseTypenames(typenames) {
+    return typenames.trim().split(/^|\s+/).map(function(t) {
+      var name = "", i = t.indexOf(".");
+      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+      return {type: t, name: name};
+    });
+  }
+
+  function onRemove(typename) {
+    return function() {
+      var on = this.__on;
+      if (!on) return;
+      for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+        if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+          this.removeEventListener(o.type, o.listener, o.capture);
+        } else {
+          on[++i] = o;
+        }
+      }
+      if (++i) on.length = i;
+      else delete this.__on;
+    };
+  }
+
+  function onAdd(typename, value, capture) {
+    var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
+    return function(d, i, group) {
+      var on = this.__on, o, listener = wrap(value, i, group);
+      if (on) for (var j = 0, m = on.length; j < m; ++j) {
+        if ((o = on[j]).type === typename.type && o.name === typename.name) {
+          this.removeEventListener(o.type, o.listener, o.capture);
+          this.addEventListener(o.type, o.listener = listener, o.capture = capture);
+          o.value = value;
+          return;
+        }
+      }
+      this.addEventListener(typename.type, listener, capture);
+      o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
+      if (!on) this.__on = [o];
+      else on.push(o);
+    };
+  }
+
+  function selection_on(typename, value, capture) {
+    var typenames = parseTypenames(typename + ""), i, n = typenames.length, t;
+
+    if (arguments.length < 2) {
+      var on = this.node().__on;
+      if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+        for (i = 0, o = on[j]; i < n; ++i) {
+          if ((t = typenames[i]).type === o.type && t.name === o.name) {
+            return o.value;
+          }
+        }
+      }
+      return;
+    }
+
+    on = value ? onAdd : onRemove;
+    if (capture == null) capture = false;
+    for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
+    return this;
+  }
+
+  function customEvent(event1, listener, that, args) {
+    var event0 = event;
+    event1.sourceEvent = event;
+    event = event1;
+    try {
+      return listener.apply(that, args);
+    } finally {
+      event = event0;
+    }
+  }
+
+  function dispatchEvent(node, type, params) {
+    var window = defaultView(node),
+        event = window.CustomEvent;
+
+    if (typeof event === "function") {
+      event = new event(type, params);
+    } else {
+      event = window.document.createEvent("Event");
+      if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
+      else event.initEvent(type, false, false);
+    }
+
+    node.dispatchEvent(event);
+  }
+
+  function dispatchConstant(type, params) {
+    return function() {
+      return dispatchEvent(this, type, params);
+    };
+  }
+
+  function dispatchFunction(type, params) {
+    return function() {
+      return dispatchEvent(this, type, params.apply(this, arguments));
+    };
+  }
+
+  function selection_dispatch(type, params) {
+    return this.each((typeof params === "function"
+        ? dispatchFunction
+        : dispatchConstant)(type, params));
+  }
+
+  var root = [null];
+
+  function Selection(groups, parents) {
+    this._groups = groups;
+    this._parents = parents;
+  }
+
+  function selection() {
+    return new Selection([[document.documentElement]], root);
+  }
+
+  Selection.prototype = selection.prototype = {
+    constructor: Selection,
+    select: selection_select,
+    selectAll: selection_selectAll,
+    filter: selection_filter,
+    data: selection_data,
+    enter: selection_enter,
+    exit: selection_exit,
+    join: selection_join,
+    merge: selection_merge,
+    order: selection_order,
+    sort: selection_sort,
+    call: selection_call,
+    nodes: selection_nodes,
+    node: selection_node,
+    size: selection_size,
+    empty: selection_empty,
+    each: selection_each,
+    attr: selection_attr,
+    style: selection_style,
+    property: selection_property,
+    classed: selection_classed,
+    text: selection_text,
+    html: selection_html,
+    raise: selection_raise,
+    lower: selection_lower,
+    append: selection_append,
+    insert: selection_insert,
+    remove: selection_remove,
+    clone: selection_clone,
+    datum: selection_datum,
+    on: selection_on,
+    dispatch: selection_dispatch
+  };
+
+  function select(selector) {
+    return typeof selector === "string"
+        ? new Selection([[document.querySelector(selector)]], [document.documentElement])
+        : new Selection([[selector]], root);
+  }
+
+  function sourceEvent() {
+    var current = event, source;
+    while (source = current.sourceEvent) current = source;
+    return current;
+  }
+
+  function point(node, event) {
+    var svg = node.ownerSVGElement || node;
+
+    if (svg.createSVGPoint) {
+      var point = svg.createSVGPoint();
+      point.x = event.clientX, point.y = event.clientY;
+      point = point.matrixTransform(node.getScreenCTM().inverse());
+      return [point.x, point.y];
+    }
+
+    var rect = node.getBoundingClientRect();
+    return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+  }
+
+  function mouse(node) {
+    var event = sourceEvent();
+    if (event.changedTouches) event = event.changedTouches[0];
+    return point(node, event);
+  }
+
+  function touch(node, touches, identifier) {
+    if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;
+
+    for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
+      if ((touch = touches[i]).identifier === identifier) {
+        return point(node, touch);
+      }
+    }
+
+    return null;
+  }
+
+  var prefix = "$";
+
+  function Map$1() {}
+
+  Map$1.prototype = map.prototype = {
+    constructor: Map$1,
+    has: function(key) {
+      return (prefix + key) in this;
+    },
+    get: function(key) {
+      return this[prefix + key];
+    },
+    set: function(key, value) {
+      this[prefix + key] = value;
+      return this;
+    },
+    remove: function(key) {
+      var property = prefix + key;
+      return property in this && delete this[property];
+    },
+    clear: function() {
+      for (var property in this) if (property[0] === prefix) delete this[property];
+    },
+    keys: function() {
+      var keys = [];
+      for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
+      return keys;
+    },
+    values: function() {
+      var values = [];
+      for (var property in this) if (property[0] === prefix) values.push(this[property]);
+      return values;
+    },
+    entries: function() {
+      var entries = [];
+      for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
+      return entries;
+    },
+    size: function() {
+      var size = 0;
+      for (var property in this) if (property[0] === prefix) ++size;
+      return size;
+    },
+    empty: function() {
+      for (var property in this) if (property[0] === prefix) return false;
+      return true;
+    },
+    each: function(f) {
+      for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
+    }
+  };
+
+  function map(object, f) {
+    var map = new Map$1;
+
+    // Copy constructor.
+    if (object instanceof Map$1) object.each(function(value, key) { map.set(key, value); });
+
+    // Index array by numeric index or specified key function.
+    else if (Array.isArray(object)) {
+      var i = -1,
+          n = object.length,
+          o;
+
+      if (f == null) while (++i < n) map.set(i, object[i]);
+      else while (++i < n) map.set(f(o = object[i], i, object), o);
+    }
+
+    // Convert object to map.
+    else if (object) for (var key in object) map.set(key, object[key]);
+
+    return map;
+  }
+
+  function Set() {}
+
+  var proto = map.prototype;
+
+  Set.prototype = set.prototype = {
+    constructor: Set,
+    has: proto.has,
+    add: function(value) {
+      value += "";
+      this[prefix + value] = value;
+      return this;
+    },
+    remove: proto.remove,
+    clear: proto.clear,
+    values: proto.keys,
+    size: proto.size,
+    empty: proto.empty,
+    each: proto.each
+  };
+
+  function set(object, f) {
+    var set = new Set;
+
+    // Copy constructor.
+    if (object instanceof Set) object.each(function(value) { set.add(value); });
+
+    // Otherwise, assume it’s an array.
+    else if (object) {
+      var i = -1, n = object.length;
+      if (f == null) while (++i < n) set.add(object[i]);
+      else while (++i < n) set.add(f(object[i], i, object));
+    }
+
+    return set;
+  }
+
+  var noop = {value: function() {}};
+
+  function dispatch() {
+    for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+      if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
+      _[t] = [];
+    }
+    return new Dispatch(_);
+  }
+
+  function Dispatch(_) {
+    this._ = _;
+  }
+
+  function parseTypenames$1(typenames, types) {
+    return typenames.trim().split(/^|\s+/).map(function(t) {
+      var name = "", i = t.indexOf(".");
+      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+      if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+      return {type: t, name: name};
+    });
+  }
+
+  Dispatch.prototype = dispatch.prototype = {
+    constructor: Dispatch,
+    on: function(typename, callback) {
+      var _ = this._,
+          T = parseTypenames$1(typename + "", _),
+          t,
+          i = -1,
+          n = T.length;
+
+      // If no callback was specified, return the callback of the given type and name.
+      if (arguments.length < 2) {
+        while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
+        return;
+      }
+
+      // If a type was specified, set the callback for the given type and name.
+      // Otherwise, if a null callback was specified, remove callbacks of the given name.
+      if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+      while (++i < n) {
+        if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);
+        else if (callback == null) for (t in _) _[t] = set$1(_[t], typename.name, null);
+      }
+
+      return this;
+    },
+    copy: function() {
+      var copy = {}, _ = this._;
+      for (var t in _) copy[t] = _[t].slice();
+      return new Dispatch(copy);
+    },
+    call: function(type, that) {
+      if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
+      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+      for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+    },
+    apply: function(type, that, args) {
+      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
+      for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
+    }
+  };
+
+  function get(type, name) {
+    for (var i = 0, n = type.length, c; i < n; ++i) {
+      if ((c = type[i]).name === name) {
+        return c.value;
+      }
+    }
+  }
+
+  function set$1(type, name, callback) {
+    for (var i = 0, n = type.length; i < n; ++i) {
+      if (type[i].name === name) {
+        type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+        break;
+      }
+    }
+    if (callback != null) type.push({name: name, value: callback});
+    return type;
+  }
+
+  function nopropagation() {
+    event.stopImmediatePropagation();
+  }
+
+  function noevent() {
+    event.preventDefault();
+    event.stopImmediatePropagation();
+  }
+
+  function dragDisable(view) {
+    var root = view.document.documentElement,
+        selection = select(view).on("dragstart.drag", noevent, true);
+    if ("onselectstart" in root) {
+      selection.on("selectstart.drag", noevent, true);
+    } else {
+      root.__noselect = root.style.MozUserSelect;
+      root.style.MozUserSelect = "none";
+    }
+  }
+
+  function yesdrag(view, noclick) {
+    var root = view.document.documentElement,
+        selection = select(view).on("dragstart.drag", null);
+    if (noclick) {
+      selection.on("click.drag", noevent, true);
+      setTimeout(function() { selection.on("click.drag", null); }, 0);
+    }
+    if ("onselectstart" in root) {
+      selection.on("selectstart.drag", null);
+    } else {
+      root.style.MozUserSelect = root.__noselect;
+      delete root.__noselect;
+    }
+  }
+
+  function constant$1(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
+    this.target = target;
+    this.type = type;
+    this.subject = subject;
+    this.identifier = id;
+    this.active = active;
+    this.x = x;
+    this.y = y;
+    this.dx = dx;
+    this.dy = dy;
+    this._ = dispatch;
+  }
+
+  DragEvent.prototype.on = function() {
+    var value = this._.on.apply(this._, arguments);
+    return value === this._ ? this : value;
+  };
+
+  // Ignore right-click, since that should open the context menu.
+  function defaultFilter() {
+    return !event.button;
+  }
+
+  function defaultContainer() {
+    return this.parentNode;
+  }
+
+  function defaultSubject(d) {
+    return d == null ? {x: event.x, y: event.y} : d;
+  }
+
+  function defaultTouchable() {
+    return "ontouchstart" in this;
+  }
+
+  function drag() {
+    var filter = defaultFilter,
+        container = defaultContainer,
+        subject = defaultSubject,
+        touchable = defaultTouchable,
+        gestures = {},
+        listeners = dispatch("start", "drag", "end"),
+        active = 0,
+        mousedownx,
+        mousedowny,
+        mousemoving,
+        touchending,
+        clickDistance2 = 0;
+
+    function drag(selection) {
+      selection
+          .on("mousedown.drag", mousedowned)
+        .filter(touchable)
+          .on("touchstart.drag", touchstarted)
+          .on("touchmove.drag", touchmoved)
+          .on("touchend.drag touchcancel.drag", touchended)
+          .style("touch-action", "none")
+          .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+    }
+
+    function mousedowned() {
+      if (touchending || !filter.apply(this, arguments)) return;
+      var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
+      if (!gesture) return;
+      select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+      dragDisable(event.view);
+      nopropagation();
+      mousemoving = false;
+      mousedownx = event.clientX;
+      mousedowny = event.clientY;
+      gesture("start");
+    }
+
+    function mousemoved() {
+      noevent();
+      if (!mousemoving) {
+        var dx = event.clientX - mousedownx, dy = event.clientY - mousedowny;
+        mousemoving = dx * dx + dy * dy > clickDistance2;
+      }
+      gestures.mouse("drag");
+    }
+
+    function mouseupped() {
+      select(event.view).on("mousemove.drag mouseup.drag", null);
+      yesdrag(event.view, mousemoving);
+      noevent();
+      gestures.mouse("end");
+    }
+
+    function touchstarted() {
+      if (!filter.apply(this, arguments)) return;
+      var touches = event.changedTouches,
+          c = container.apply(this, arguments),
+          n = touches.length, i, gesture;
+
+      for (i = 0; i < n; ++i) {
+        if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments)) {
+          nopropagation();
+          gesture("start");
+        }
+      }
+    }
+
+    function touchmoved() {
+      var touches = event.changedTouches,
+          n = touches.length, i, gesture;
+
+      for (i = 0; i < n; ++i) {
+        if (gesture = gestures[touches[i].identifier]) {
+          noevent();
+          gesture("drag");
+        }
+      }
+    }
+
+    function touchended() {
+      var touches = event.changedTouches,
+          n = touches.length, i, gesture;
+
+      if (touchending) clearTimeout(touchending);
+      touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
+      for (i = 0; i < n; ++i) {
+        if (gesture = gestures[touches[i].identifier]) {
+          nopropagation();
+          gesture("end");
+        }
+      }
+    }
+
+    function beforestart(id, container, point, that, args) {
+      var p = point(container, id), s, dx, dy,
+          sublisteners = listeners.copy();
+
+      if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
+        if ((event.subject = s = subject.apply(that, args)) == null) return false;
+        dx = s.x - p[0] || 0;
+        dy = s.y - p[1] || 0;
+        return true;
+      })) return;
+
+      return function gesture(type) {
+        var p0 = p, n;
+        switch (type) {
+          case "start": gestures[id] = gesture, n = active++; break;
+          case "end": delete gestures[id], --active; // nobreak
+          case "drag": p = point(container, id), n = active; break;
+        }
+        customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
+      };
+    }
+
+    drag.filter = function(_) {
+      return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
+    };
+
+    drag.container = function(_) {
+      return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
+    };
+
+    drag.subject = function(_) {
+      return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
+    };
+
+    drag.touchable = function(_) {
+      return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
+    };
+
+    drag.on = function() {
+      var value = listeners.on.apply(listeners, arguments);
+      return value === listeners ? drag : value;
+    };
+
+    drag.clickDistance = function(_) {
+      return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+    };
+
+    return drag;
+  }
+
+  function define(constructor, factory, prototype) {
+    constructor.prototype = factory.prototype = prototype;
+    prototype.constructor = constructor;
+  }
+
+  function extend(parent, definition) {
+    var prototype = Object.create(parent.prototype);
+    for (var key in definition) prototype[key] = definition[key];
+    return prototype;
+  }
+
+  function Color() {}
+
+  var darker = 0.7;
+  var brighter = 1 / darker;
+
+  var reI = "\\s*([+-]?\\d+)\\s*",
+      reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+      reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+      reHex3 = /^#([0-9a-f]{3})$/,
+      reHex6 = /^#([0-9a-f]{6})$/,
+      reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
+      reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
+      reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
+      reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
+      reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
+      reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+
+  var named = {
+    aliceblue: 0xf0f8ff,
+    antiquewhite: 0xfaebd7,
+    aqua: 0x00ffff,
+    aquamarine: 0x7fffd4,
+    azure: 0xf0ffff,
+    beige: 0xf5f5dc,
+    bisque: 0xffe4c4,
+    black: 0x000000,
+    blanchedalmond: 0xffebcd,
+    blue: 0x0000ff,
+    blueviolet: 0x8a2be2,
+    brown: 0xa52a2a,
+    burlywood: 0xdeb887,
+    cadetblue: 0x5f9ea0,
+    chartreuse: 0x7fff00,
+    chocolate: 0xd2691e,
+    coral: 0xff7f50,
+    cornflowerblue: 0x6495ed,
+    cornsilk: 0xfff8dc,
+    crimson: 0xdc143c,
+    cyan: 0x00ffff,
+    darkblue: 0x00008b,
+    darkcyan: 0x008b8b,
+    darkgoldenrod: 0xb8860b,
+    darkgray: 0xa9a9a9,
+    darkgreen: 0x006400,
+    darkgrey: 0xa9a9a9,
+    darkkhaki: 0xbdb76b,
+    darkmagenta: 0x8b008b,
+    darkolivegreen: 0x556b2f,
+    darkorange: 0xff8c00,
+    darkorchid: 0x9932cc,
+    darkred: 0x8b0000,
+    darksalmon: 0xe9967a,
+    darkseagreen: 0x8fbc8f,
+    darkslateblue: 0x483d8b,
+    darkslategray: 0x2f4f4f,
+    darkslategrey: 0x2f4f4f,
+    darkturquoise: 0x00ced1,
+    darkviolet: 0x9400d3,
+    deeppink: 0xff1493,
+    deepskyblue: 0x00bfff,
+    dimgray: 0x696969,
+    dimgrey: 0x696969,
+    dodgerblue: 0x1e90ff,
+    firebrick: 0xb22222,
+    floralwhite: 0xfffaf0,
+    forestgreen: 0x228b22,
+    fuchsia: 0xff00ff,
+    gainsboro: 0xdcdcdc,
+    ghostwhite: 0xf8f8ff,
+    gold: 0xffd700,
+    goldenrod: 0xdaa520,
+    gray: 0x808080,
+    green: 0x008000,
+    greenyellow: 0xadff2f,
+    grey: 0x808080,
+    honeydew: 0xf0fff0,
+    hotpink: 0xff69b4,
+    indianred: 0xcd5c5c,
+    indigo: 0x4b0082,
+    ivory: 0xfffff0,
+    khaki: 0xf0e68c,
+    lavender: 0xe6e6fa,
+    lavenderblush: 0xfff0f5,
+    lawngreen: 0x7cfc00,
+    lemonchiffon: 0xfffacd,
+    lightblue: 0xadd8e6,
+    lightcoral: 0xf08080,
+    lightcyan: 0xe0ffff,
+    lightgoldenrodyellow: 0xfafad2,
+    lightgray: 0xd3d3d3,
+    lightgreen: 0x90ee90,
+    lightgrey: 0xd3d3d3,
+    lightpink: 0xffb6c1,
+    lightsalmon: 0xffa07a,
+    lightseagreen: 0x20b2aa,
+    lightskyblue: 0x87cefa,
+    lightslategray: 0x778899,
+    lightslategrey: 0x778899,
+    lightsteelblue: 0xb0c4de,
+    lightyellow: 0xffffe0,
+    lime: 0x00ff00,
+    limegreen: 0x32cd32,
+    linen: 0xfaf0e6,
+    magenta: 0xff00ff,
+    maroon: 0x800000,
+    mediumaquamarine: 0x66cdaa,
+    mediumblue: 0x0000cd,
+    mediumorchid: 0xba55d3,
+    mediumpurple: 0x9370db,
+    mediumseagreen: 0x3cb371,
+    mediumslateblue: 0x7b68ee,
+    mediumspringgreen: 0x00fa9a,
+    mediumturquoise: 0x48d1cc,
+    mediumvioletred: 0xc71585,
+    midnightblue: 0x191970,
+    mintcream: 0xf5fffa,
+    mistyrose: 0xffe4e1,
+    moccasin: 0xffe4b5,
+    navajowhite: 0xffdead,
+    navy: 0x000080,
+    oldlace: 0xfdf5e6,
+    olive: 0x808000,
+    olivedrab: 0x6b8e23,
+    orange: 0xffa500,
+    orangered: 0xff4500,
+    orchid: 0xda70d6,
+    palegoldenrod: 0xeee8aa,
+    palegreen: 0x98fb98,
+    paleturquoise: 0xafeeee,
+    palevioletred: 0xdb7093,
+    papayawhip: 0xffefd5,
+    peachpuff: 0xffdab9,
+    peru: 0xcd853f,
+    pink: 0xffc0cb,
+    plum: 0xdda0dd,
+    powderblue: 0xb0e0e6,
+    purple: 0x800080,
+    rebeccapurple: 0x663399,
+    red: 0xff0000,
+    rosybrown: 0xbc8f8f,
+    royalblue: 0x4169e1,
+    saddlebrown: 0x8b4513,
+    salmon: 0xfa8072,
+    sandybrown: 0xf4a460,
+    seagreen: 0x2e8b57,
+    seashell: 0xfff5ee,
+    sienna: 0xa0522d,
+    silver: 0xc0c0c0,
+    skyblue: 0x87ceeb,
+    slateblue: 0x6a5acd,
+    slategray: 0x708090,
+    slategrey: 0x708090,
+    snow: 0xfffafa,
+    springgreen: 0x00ff7f,
+    steelblue: 0x4682b4,
+    tan: 0xd2b48c,
+    teal: 0x008080,
+    thistle: 0xd8bfd8,
+    tomato: 0xff6347,
+    turquoise: 0x40e0d0,
+    violet: 0xee82ee,
+    wheat: 0xf5deb3,
+    white: 0xffffff,
+    whitesmoke: 0xf5f5f5,
+    yellow: 0xffff00,
+    yellowgreen: 0x9acd32
+  };
+
+  define(Color, color, {
+    displayable: function() {
+      return this.rgb().displayable();
+    },
+    hex: function() {
+      return this.rgb().hex();
+    },
+    toString: function() {
+      return this.rgb() + "";
+    }
+  });
+
+  function color(format) {
+    var m;
+    format = (format + "").trim().toLowerCase();
+    return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
+        : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
+        : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+        : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+        : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+        : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+        : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+        : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+        : named.hasOwnProperty(format) ? rgbn(named[format])
+        : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
+        : null;
+  }
+
+  function rgbn(n) {
+    return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+  }
+
+  function rgba(r, g, b, a) {
+    if (a <= 0) r = g = b = NaN;
+    return new Rgb(r, g, b, a);
+  }
+
+  function rgbConvert(o) {
+    if (!(o instanceof Color)) o = color(o);
+    if (!o) return new Rgb;
+    o = o.rgb();
+    return new Rgb(o.r, o.g, o.b, o.opacity);
+  }
+
+  function rgb(r, g, b, opacity) {
+    return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+  }
+
+  function Rgb(r, g, b, opacity) {
+    this.r = +r;
+    this.g = +g;
+    this.b = +b;
+    this.opacity = +opacity;
+  }
+
+  define(Rgb, rgb, extend(Color, {
+    brighter: function(k) {
+      k = k == null ? brighter : Math.pow(brighter, k);
+      return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+    },
+    darker: function(k) {
+      k = k == null ? darker : Math.pow(darker, k);
+      return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+    },
+    rgb: function() {
+      return this;
+    },
+    displayable: function() {
+      return (0 <= this.r && this.r <= 255)
+          && (0 <= this.g && this.g <= 255)
+          && (0 <= this.b && this.b <= 255)
+          && (0 <= this.opacity && this.opacity <= 1);
+    },
+    hex: function() {
+      return "#" + hex(this.r) + hex(this.g) + hex(this.b);
+    },
+    toString: function() {
+      var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+      return (a === 1 ? "rgb(" : "rgba(")
+          + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
+          + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
+          + Math.max(0, Math.min(255, Math.round(this.b) || 0))
+          + (a === 1 ? ")" : ", " + a + ")");
+    }
+  }));
+
+  function hex(value) {
+    value = Math.max(0, Math.min(255, Math.round(value) || 0));
+    return (value < 16 ? "0" : "") + value.toString(16);
+  }
+
+  function hsla(h, s, l, a) {
+    if (a <= 0) h = s = l = NaN;
+    else if (l <= 0 || l >= 1) h = s = NaN;
+    else if (s <= 0) h = NaN;
+    return new Hsl(h, s, l, a);
+  }
+
+  function hslConvert(o) {
+    if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+    if (!(o instanceof Color)) o = color(o);
+    if (!o) return new Hsl;
+    if (o instanceof Hsl) return o;
+    o = o.rgb();
+    var r = o.r / 255,
+        g = o.g / 255,
+        b = o.b / 255,
+        min = Math.min(r, g, b),
+        max = Math.max(r, g, b),
+        h = NaN,
+        s = max - min,
+        l = (max + min) / 2;
+    if (s) {
+      if (r === max) h = (g - b) / s + (g < b) * 6;
+      else if (g === max) h = (b - r) / s + 2;
+      else h = (r - g) / s + 4;
+      s /= l < 0.5 ? max + min : 2 - max - min;
+      h *= 60;
+    } else {
+      s = l > 0 && l < 1 ? 0 : h;
+    }
+    return new Hsl(h, s, l, o.opacity);
+  }
+
+  function hsl(h, s, l, opacity) {
+    return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+  }
+
+  function Hsl(h, s, l, opacity) {
+    this.h = +h;
+    this.s = +s;
+    this.l = +l;
+    this.opacity = +opacity;
+  }
+
+  define(Hsl, hsl, extend(Color, {
+    brighter: function(k) {
+      k = k == null ? brighter : Math.pow(brighter, k);
+      return new Hsl(this.h, this.s, this.l * k, this.opacity);
+    },
+    darker: function(k) {
+      k = k == null ? darker : Math.pow(darker, k);
+      return new Hsl(this.h, this.s, this.l * k, this.opacity);
+    },
+    rgb: function() {
+      var h = this.h % 360 + (this.h < 0) * 360,
+          s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+          l = this.l,
+          m2 = l + (l < 0.5 ? l : 1 - l) * s,
+          m1 = 2 * l - m2;
+      return new Rgb(
+        hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
+        hsl2rgb(h, m1, m2),
+        hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
+        this.opacity
+      );
+    },
+    displayable: function() {
+      return (0 <= this.s && this.s <= 1 || isNaN(this.s))
+          && (0 <= this.l && this.l <= 1)
+          && (0 <= this.opacity && this.opacity <= 1);
+    }
+  }));
+
+  /* From FvD 13.37, CSS Color Module Level 3 */
+  function hsl2rgb(h, m1, m2) {
+    return (h < 60 ? m1 + (m2 - m1) * h / 60
+        : h < 180 ? m2
+        : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
+        : m1) * 255;
+  }
+
+  var deg2rad = Math.PI / 180;
+  var rad2deg = 180 / Math.PI;
+
+  // https://beta.observablehq.com/@mbostock/lab-and-rgb
+  var K = 18,
+      Xn = 0.96422,
+      Yn = 1,
+      Zn = 0.82521,
+      t0 = 4 / 29,
+      t1 = 6 / 29,
+      t2 = 3 * t1 * t1,
+      t3 = t1 * t1 * t1;
+
+  function labConvert(o) {
+    if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
+    if (o instanceof Hcl) {
+      if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);
+      var h = o.h * deg2rad;
+      return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
+    }
+    if (!(o instanceof Rgb)) o = rgbConvert(o);
+    var r = rgb2lrgb(o.r),
+        g = rgb2lrgb(o.g),
+        b = rgb2lrgb(o.b),
+        y = xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / Yn), x, z;
+    if (r === g && g === b) x = z = y; else {
+      x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / Xn);
+      z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / Zn);
+    }
+    return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
+  }
+
+  function lab(l, a, b, opacity) {
+    return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
+  }
+
+  function Lab(l, a, b, opacity) {
+    this.l = +l;
+    this.a = +a;
+    this.b = +b;
+    this.opacity = +opacity;
+  }
+
+  define(Lab, lab, extend(Color, {
+    brighter: function(k) {
+      return new Lab(this.l + K * (k == null ? 1 : k), this.a, this.b, this.opacity);
+    },
+    darker: function(k) {
+      return new Lab(this.l - K * (k == null ? 1 : k), this.a, this.b, this.opacity);
+    },
+    rgb: function() {
+      var y = (this.l + 16) / 116,
+          x = isNaN(this.a) ? y : y + this.a / 500,
+          z = isNaN(this.b) ? y : y - this.b / 200;
+      x = Xn * lab2xyz(x);
+      y = Yn * lab2xyz(y);
+      z = Zn * lab2xyz(z);
+      return new Rgb(
+        lrgb2rgb( 3.1338561 * x - 1.6168667 * y - 0.4906146 * z),
+        lrgb2rgb(-0.9787684 * x + 1.9161415 * y + 0.0334540 * z),
+        lrgb2rgb( 0.0719453 * x - 0.2289914 * y + 1.4052427 * z),
+        this.opacity
+      );
+    }
+  }));
+
+  function xyz2lab(t) {
+    return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
+  }
+
+  function lab2xyz(t) {
+    return t > t1 ? t * t * t : t2 * (t - t0);
+  }
+
+  function lrgb2rgb(x) {
+    return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
+  }
+
+  function rgb2lrgb(x) {
+    return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
+  }
+
+  function hclConvert(o) {
+    if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
+    if (!(o instanceof Lab)) o = labConvert(o);
+    if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0, o.l, o.opacity);
+    var h = Math.atan2(o.b, o.a) * rad2deg;
+    return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
+  }
+
+  function hcl(h, c, l, opacity) {
+    return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
+  }
+
+  function Hcl(h, c, l, opacity) {
+    this.h = +h;
+    this.c = +c;
+    this.l = +l;
+    this.opacity = +opacity;
+  }
+
+  define(Hcl, hcl, extend(Color, {
+    brighter: function(k) {
+      return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);
+    },
+    darker: function(k) {
+      return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);
+    },
+    rgb: function() {
+      return labConvert(this).rgb();
+    }
+  }));
+
+  var A = -0.14861,
+      B = +1.78277,
+      C = -0.29227,
+      D = -0.90649,
+      E = +1.97294,
+      ED = E * D,
+      EB = E * B,
+      BC_DA = B * C - D * A;
+
+  function cubehelixConvert(o) {
+    if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
+    if (!(o instanceof Rgb)) o = rgbConvert(o);
+    var r = o.r / 255,
+        g = o.g / 255,
+        b = o.b / 255,
+        l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
+        bl = b - l,
+        k = (E * (g - l) - C * bl) / D,
+        s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
+        h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
+    return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
+  }
+
+  function cubehelix(h, s, l, opacity) {
+    return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
+  }
+
+  function Cubehelix(h, s, l, opacity) {
+    this.h = +h;
+    this.s = +s;
+    this.l = +l;
+    this.opacity = +opacity;
+  }
+
+  define(Cubehelix, cubehelix, extend(Color, {
+    brighter: function(k) {
+      k = k == null ? brighter : Math.pow(brighter, k);
+      return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+    },
+    darker: function(k) {
+      k = k == null ? darker : Math.pow(darker, k);
+      return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
+    },
+    rgb: function() {
+      var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
+          l = +this.l,
+          a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
+          cosh = Math.cos(h),
+          sinh = Math.sin(h);
+      return new Rgb(
+        255 * (l + a * (A * cosh + B * sinh)),
+        255 * (l + a * (C * cosh + D * sinh)),
+        255 * (l + a * (E * cosh)),
+        this.opacity
+      );
+    }
+  }));
+
+  function constant$2(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  function linear(a, d) {
+    return function(t) {
+      return a + t * d;
+    };
+  }
+
+  function exponential(a, b, y) {
+    return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
+      return Math.pow(a + t * b, y);
+    };
+  }
+
+  function gamma(y) {
+    return (y = +y) === 1 ? nogamma : function(a, b) {
+      return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
+    };
+  }
+
+  function nogamma(a, b) {
+    var d = b - a;
+    return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+  }
+
+  var interpolateRgb = (function rgbGamma(y) {
+    var color = gamma(y);
+
+    function rgb$1(start, end) {
+      var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+          g = color(start.g, end.g),
+          b = color(start.b, end.b),
+          opacity = nogamma(start.opacity, end.opacity);
+      return function(t) {
+        start.r = r(t);
+        start.g = g(t);
+        start.b = b(t);
+        start.opacity = opacity(t);
+        return start + "";
+      };
+    }
+
+    rgb$1.gamma = rgbGamma;
+
+    return rgb$1;
+  })(1);
+
+  function interpolateNumber(a, b) {
+    return a = +a, b -= a, function(t) {
+      return a + b * t;
+    };
+  }
+
+  var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+      reB = new RegExp(reA.source, "g");
+
+  function zero(b) {
+    return function() {
+      return b;
+    };
+  }
+
+  function one(b) {
+    return function(t) {
+      return b(t) + "";
+    };
+  }
+
+  function interpolateString(a, b) {
+    var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
+        am, // current match in a
+        bm, // current match in b
+        bs, // string preceding current number in b, if any
+        i = -1, // index in s
+        s = [], // string constants and placeholders
+        q = []; // number interpolators
+
+    // Coerce inputs to strings.
+    a = a + "", b = b + "";
+
+    // Interpolate pairs of numbers in a & b.
+    while ((am = reA.exec(a))
+        && (bm = reB.exec(b))) {
+      if ((bs = bm.index) > bi) { // a string precedes the next number in b
+        bs = b.slice(bi, bs);
+        if (s[i]) s[i] += bs; // coalesce with previous string
+        else s[++i] = bs;
+      }
+      if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
+        if (s[i]) s[i] += bm; // coalesce with previous string
+        else s[++i] = bm;
+      } else { // interpolate non-matching numbers
+        s[++i] = null;
+        q.push({i: i, x: interpolateNumber(am, bm)});
+      }
+      bi = reB.lastIndex;
+    }
+
+    // Add remains of b.
+    if (bi < b.length) {
+      bs = b.slice(bi);
+      if (s[i]) s[i] += bs; // coalesce with previous string
+      else s[++i] = bs;
+    }
+
+    // Special optimization for only a single match.
+    // Otherwise, interpolate each of the numbers and rejoin the string.
+    return s.length < 2 ? (q[0]
+        ? one(q[0].x)
+        : zero(b))
+        : (b = q.length, function(t) {
+            for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
+            return s.join("");
+          });
+  }
+
+  var degrees = 180 / Math.PI;
+
+  var identity = {
+    translateX: 0,
+    translateY: 0,
+    rotate: 0,
+    skewX: 0,
+    scaleX: 1,
+    scaleY: 1
+  };
+
+  function decompose(a, b, c, d, e, f) {
+    var scaleX, scaleY, skewX;
+    if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+    if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+    if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+    if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+    return {
+      translateX: e,
+      translateY: f,
+      rotate: Math.atan2(b, a) * degrees,
+      skewX: Math.atan(skewX) * degrees,
+      scaleX: scaleX,
+      scaleY: scaleY
+    };
+  }
+
+  var cssNode,
+      cssRoot,
+      cssView,
+      svgNode;
+
+  function parseCss(value) {
+    if (value === "none") return identity;
+    if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
+    cssNode.style.transform = value;
+    value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
+    cssRoot.removeChild(cssNode);
+    value = value.slice(7, -1).split(",");
+    return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
+  }
+
+  function parseSvg(value) {
+    if (value == null) return identity;
+    if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+    svgNode.setAttribute("transform", value);
+    if (!(value = svgNode.transform.baseVal.consolidate())) return identity;
+    value = value.matrix;
+    return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+  }
+
+  function interpolateTransform(parse, pxComma, pxParen, degParen) {
+
+    function pop(s) {
+      return s.length ? s.pop() + " " : "";
+    }
+
+    function translate(xa, ya, xb, yb, s, q) {
+      if (xa !== xb || ya !== yb) {
+        var i = s.push("translate(", null, pxComma, null, pxParen);
+        q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
+      } else if (xb || yb) {
+        s.push("translate(" + xb + pxComma + yb + pxParen);
+      }
+    }
+
+    function rotate(a, b, s, q) {
+      if (a !== b) {
+        if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
+        q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: interpolateNumber(a, b)});
+      } else if (b) {
+        s.push(pop(s) + "rotate(" + b + degParen);
+      }
+    }
+
+    function skewX(a, b, s, q) {
+      if (a !== b) {
+        q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: interpolateNumber(a, b)});
+      } else if (b) {
+        s.push(pop(s) + "skewX(" + b + degParen);
+      }
+    }
+
+    function scale(xa, ya, xb, yb, s, q) {
+      if (xa !== xb || ya !== yb) {
+        var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+        q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});
+      } else if (xb !== 1 || yb !== 1) {
+        s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+      }
+    }
+
+    return function(a, b) {
+      var s = [], // string constants and placeholders
+          q = []; // number interpolators
+      a = parse(a), b = parse(b);
+      translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+      rotate(a.rotate, b.rotate, s, q);
+      skewX(a.skewX, b.skewX, s, q);
+      scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+      a = b = null; // gc
+      return function(t) {
+        var i = -1, n = q.length, o;
+        while (++i < n) s[(o = q[i]).i] = o.x(t);
+        return s.join("");
+      };
+    };
+  }
+
+  var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+  var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
+
+  var rho = Math.SQRT2,
+      rho2 = 2,
+      rho4 = 4,
+      epsilon2 = 1e-12;
+
+  function cosh(x) {
+    return ((x = Math.exp(x)) + 1 / x) / 2;
+  }
+
+  function sinh(x) {
+    return ((x = Math.exp(x)) - 1 / x) / 2;
+  }
+
+  function tanh(x) {
+    return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+  }
+
+  // p0 = [ux0, uy0, w0]
+  // p1 = [ux1, uy1, w1]
+  function interpolateZoom(p0, p1) {
+    var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
+        ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
+        dx = ux1 - ux0,
+        dy = uy1 - uy0,
+        d2 = dx * dx + dy * dy,
+        i,
+        S;
+
+    // Special case for u0 ≅ u1.
+    if (d2 < epsilon2) {
+      S = Math.log(w1 / w0) / rho;
+      i = function(t) {
+        return [
+          ux0 + t * dx,
+          uy0 + t * dy,
+          w0 * Math.exp(rho * t * S)
+        ];
+      };
+    }
+
+    // General case.
+    else {
+      var d1 = Math.sqrt(d2),
+          b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+          b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+          r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+          r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+      S = (r1 - r0) / rho;
+      i = function(t) {
+        var s = t * S,
+            coshr0 = cosh(r0),
+            u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+        return [
+          ux0 + u * dx,
+          uy0 + u * dy,
+          w0 * coshr0 / cosh(rho * s + r0)
+        ];
+      };
+    }
+
+    i.duration = S * 1000;
+
+    return i;
+  }
+
+  var frame = 0, // is an animation frame pending?
+      timeout = 0, // is a timeout pending?
+      interval = 0, // are any timers active?
+      pokeDelay = 1000, // how frequently we check for clock skew
+      taskHead,
+      taskTail,
+      clockLast = 0,
+      clockNow = 0,
+      clockSkew = 0,
+      clock = typeof performance === "object" && performance.now ? performance : Date,
+      setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+
+  function now() {
+    return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+  }
+
+  function clearNow() {
+    clockNow = 0;
+  }
+
+  function Timer() {
+    this._call =
+    this._time =
+    this._next = null;
+  }
+
+  Timer.prototype = timer.prototype = {
+    constructor: Timer,
+    restart: function(callback, delay, time) {
+      if (typeof callback !== "function") throw new TypeError("callback is not a function");
+      time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
+      if (!this._next && taskTail !== this) {
+        if (taskTail) taskTail._next = this;
+        else taskHead = this;
+        taskTail = this;
+      }
+      this._call = callback;
+      this._time = time;
+      sleep();
+    },
+    stop: function() {
+      if (this._call) {
+        this._call = null;
+        this._time = Infinity;
+        sleep();
+      }
+    }
+  };
+
+  function timer(callback, delay, time) {
+    var t = new Timer;
+    t.restart(callback, delay, time);
+    return t;
+  }
+
+  function timerFlush() {
+    now(); // Get the current time, if not already set.
+    ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+    var t = taskHead, e;
+    while (t) {
+      if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+      t = t._next;
+    }
+    --frame;
+  }
+
+  function wake() {
+    clockNow = (clockLast = clock.now()) + clockSkew;
+    frame = timeout = 0;
+    try {
+      timerFlush();
+    } finally {
+      frame = 0;
+      nap();
+      clockNow = 0;
+    }
+  }
+
+  function poke() {
+    var now = clock.now(), delay = now - clockLast;
+    if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+  }
+
+  function nap() {
+    var t0, t1 = taskHead, t2, time = Infinity;
+    while (t1) {
+      if (t1._call) {
+        if (time > t1._time) time = t1._time;
+        t0 = t1, t1 = t1._next;
+      } else {
+        t2 = t1._next, t1._next = null;
+        t1 = t0 ? t0._next = t2 : taskHead = t2;
+      }
+    }
+    taskTail = t0;
+    sleep(time);
+  }
+
+  function sleep(time) {
+    if (frame) return; // Soonest alarm already set, or will be.
+    if (timeout) timeout = clearTimeout(timeout);
+    var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+    if (delay > 24) {
+      if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+      if (interval) interval = clearInterval(interval);
+    } else {
+      if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+      frame = 1, setFrame(wake);
+    }
+  }
+
+  function timeout$1(callback, delay, time) {
+    var t = new Timer;
+    delay = delay == null ? 0 : +delay;
+    t.restart(function(elapsed) {
+      t.stop();
+      callback(elapsed + delay);
+    }, delay, time);
+    return t;
+  }
+
+  var emptyOn = dispatch("start", "end", "cancel", "interrupt");
+  var emptyTween = [];
+
+  var CREATED = 0;
+  var SCHEDULED = 1;
+  var STARTING = 2;
+  var STARTED = 3;
+  var RUNNING = 4;
+  var ENDING = 5;
+  var ENDED = 6;
+
+  function schedule(node, name, id, index, group, timing) {
+    var schedules = node.__transition;
+    if (!schedules) node.__transition = {};
+    else if (id in schedules) return;
+    create(node, id, {
+      name: name,
+      index: index, // For context during callback.
+      group: group, // For context during callback.
+      on: emptyOn,
+      tween: emptyTween,
+      time: timing.time,
+      delay: timing.delay,
+      duration: timing.duration,
+      ease: timing.ease,
+      timer: null,
+      state: CREATED
+    });
+  }
+
+  function init(node, id) {
+    var schedule = get$1(node, id);
+    if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+    return schedule;
+  }
+
+  function set$2(node, id) {
+    var schedule = get$1(node, id);
+    if (schedule.state > STARTED) throw new Error("too late; already running");
+    return schedule;
+  }
+
+  function get$1(node, id) {
+    var schedule = node.__transition;
+    if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+    return schedule;
+  }
+
+  function create(node, id, self) {
+    var schedules = node.__transition,
+        tween;
+
+    // Initialize the self timer when the transition is created.
+    // Note the actual delay is not known until the first callback!
+    schedules[id] = self;
+    self.timer = timer(schedule, 0, self.time);
+
+    function schedule(elapsed) {
+      self.state = SCHEDULED;
+      self.timer.restart(start, self.delay, self.time);
+
+      // If the elapsed delay is less than our first sleep, start immediately.
+      if (self.delay <= elapsed) start(elapsed - self.delay);
+    }
+
+    function start(elapsed) {
+      var i, j, n, o;
+
+      // If the state is not SCHEDULED, then we previously errored on start.
+      if (self.state !== SCHEDULED) return stop();
+
+      for (i in schedules) {
+        o = schedules[i];
+        if (o.name !== self.name) continue;
+
+        // While this element already has a starting transition during this frame,
+        // defer starting an interrupting transition until that transition has a
+        // chance to tick (and possibly end); see d3/d3-transition#54!
+        if (o.state === STARTED) return timeout$1(start);
+
+        // Interrupt the active transition, if any.
+        if (o.state === RUNNING) {
+          o.state = ENDED;
+          o.timer.stop();
+          o.on.call("interrupt", node, node.__data__, o.index, o.group);
+          delete schedules[i];
+        }
+
+        // Cancel any pre-empted transitions.
+        else if (+i < id) {
+          o.state = ENDED;
+          o.timer.stop();
+          o.on.call("cancel", node, node.__data__, o.index, o.group);
+          delete schedules[i];
+        }
+      }
+
+      // Defer the first tick to end of the current frame; see d3/d3#1576.
+      // Note the transition may be canceled after start and before the first tick!
+      // Note this must be scheduled before the start event; see d3/d3-transition#16!
+      // Assuming this is successful, subsequent callbacks go straight to tick.
+      timeout$1(function() {
+        if (self.state === STARTED) {
+          self.state = RUNNING;
+          self.timer.restart(tick, self.delay, self.time);
+          tick(elapsed);
+        }
+      });
+
+      // Dispatch the start event.
+      // Note this must be done before the tween are initialized.
+      self.state = STARTING;
+      self.on.call("start", node, node.__data__, self.index, self.group);
+      if (self.state !== STARTING) return; // interrupted
+      self.state = STARTED;
+
+      // Initialize the tween, deleting null tween.
+      tween = new Array(n = self.tween.length);
+      for (i = 0, j = -1; i < n; ++i) {
+        if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+          tween[++j] = o;
+        }
+      }
+      tween.length = j + 1;
+    }
+
+    function tick(elapsed) {
+      var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+          i = -1,
+          n = tween.length;
+
+      while (++i < n) {
+        tween[i].call(node, t);
+      }
+
+      // Dispatch the end event.
+      if (self.state === ENDING) {
+        self.on.call("end", node, node.__data__, self.index, self.group);
+        stop();
+      }
+    }
+
+    function stop() {
+      self.state = ENDED;
+      self.timer.stop();
+      delete schedules[id];
+      for (var i in schedules) return; // eslint-disable-line no-unused-vars
+      delete node.__transition;
+    }
+  }
+
+  function interrupt(node, name) {
+    var schedules = node.__transition,
+        schedule,
+        active,
+        empty = true,
+        i;
+
+    if (!schedules) return;
+
+    name = name == null ? null : name + "";
+
+    for (i in schedules) {
+      if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
+      active = schedule.state > STARTING && schedule.state < ENDING;
+      schedule.state = ENDED;
+      schedule.timer.stop();
+      schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
+      delete schedules[i];
+    }
+
+    if (empty) delete node.__transition;
+  }
+
+  function selection_interrupt(name) {
+    return this.each(function() {
+      interrupt(this, name);
+    });
+  }
+
+  function tweenRemove(id, name) {
+    var tween0, tween1;
+    return function() {
+      var schedule = set$2(this, id),
+          tween = schedule.tween;
+
+      // If this node shared tween with the previous node,
+      // just assign the updated shared tween and we’re done!
+      // Otherwise, copy-on-write.
+      if (tween !== tween0) {
+        tween1 = tween0 = tween;
+        for (var i = 0, n = tween1.length; i < n; ++i) {
+          if (tween1[i].name === name) {
+            tween1 = tween1.slice();
+            tween1.splice(i, 1);
+            break;
+          }
+        }
+      }
+
+      schedule.tween = tween1;
+    };
+  }
+
+  function tweenFunction(id, name, value) {
+    var tween0, tween1;
+    if (typeof value !== "function") throw new Error;
+    return function() {
+      var schedule = set$2(this, id),
+          tween = schedule.tween;
+
+      // If this node shared tween with the previous node,
+      // just assign the updated shared tween and we’re done!
+      // Otherwise, copy-on-write.
+      if (tween !== tween0) {
+        tween1 = (tween0 = tween).slice();
+        for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
+          if (tween1[i].name === name) {
+            tween1[i] = t;
+            break;
+          }
+        }
+        if (i === n) tween1.push(t);
+      }
+
+      schedule.tween = tween1;
+    };
+  }
+
+  function transition_tween(name, value) {
+    var id = this._id;
+
+    name += "";
+
+    if (arguments.length < 2) {
+      var tween = get$1(this.node(), id).tween;
+      for (var i = 0, n = tween.length, t; i < n; ++i) {
+        if ((t = tween[i]).name === name) {
+          return t.value;
+        }
+      }
+      return null;
+    }
+
+    return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+  }
+
+  function tweenValue(transition, name, value) {
+    var id = transition._id;
+
+    transition.each(function() {
+      var schedule = set$2(this, id);
+      (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
+    });
+
+    return function(node) {
+      return get$1(node, id).value[name];
+    };
+  }
+
+  function interpolate(a, b) {
+    var c;
+    return (typeof b === "number" ? interpolateNumber
+        : b instanceof color ? interpolateRgb
+        : (c = color(b)) ? (b = c, interpolateRgb)
+        : interpolateString)(a, b);
+  }
+
+  function attrRemove$1(name) {
+    return function() {
+      this.removeAttribute(name);
+    };
+  }
+
+  function attrRemoveNS$1(fullname) {
+    return function() {
+      this.removeAttributeNS(fullname.space, fullname.local);
+    };
+  }
+
+  function attrConstant$1(name, interpolate, value1) {
+    var string00,
+        string1 = value1 + "",
+        interpolate0;
+    return function() {
+      var string0 = this.getAttribute(name);
+      return string0 === string1 ? null
+          : string0 === string00 ? interpolate0
+          : interpolate0 = interpolate(string00 = string0, value1);
+    };
+  }
+
+  function attrConstantNS$1(fullname, interpolate, value1) {
+    var string00,
+        string1 = value1 + "",
+        interpolate0;
+    return function() {
+      var string0 = this.getAttributeNS(fullname.space, fullname.local);
+      return string0 === string1 ? null
+          : string0 === string00 ? interpolate0
+          : interpolate0 = interpolate(string00 = string0, value1);
+    };
+  }
+
+  function attrFunction$1(name, interpolate, value) {
+    var string00,
+        string10,
+        interpolate0;
+    return function() {
+      var string0, value1 = value(this), string1;
+      if (value1 == null) return void this.removeAttribute(name);
+      string0 = this.getAttribute(name);
+      string1 = value1 + "";
+      return string0 === string1 ? null
+          : string0 === string00 && string1 === string10 ? interpolate0
+          : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+    };
+  }
+
+  function attrFunctionNS$1(fullname, interpolate, value) {
+    var string00,
+        string10,
+        interpolate0;
+    return function() {
+      var string0, value1 = value(this), string1;
+      if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+      string0 = this.getAttributeNS(fullname.space, fullname.local);
+      string1 = value1 + "";
+      return string0 === string1 ? null
+          : string0 === string00 && string1 === string10 ? interpolate0
+          : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+    };
+  }
+
+  function transition_attr(name, value) {
+    var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate;
+    return this.attrTween(name, typeof value === "function"
+        ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
+        : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
+        : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
+  }
+
+  function attrInterpolate(name, i) {
+    return function(t) {
+      this.setAttribute(name, i(t));
+    };
+  }
+
+  function attrInterpolateNS(fullname, i) {
+    return function(t) {
+      this.setAttributeNS(fullname.space, fullname.local, i(t));
+    };
+  }
+
+  function attrTweenNS(fullname, value) {
+    var t0, i0;
+    function tween() {
+      var i = value.apply(this, arguments);
+      if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+      return t0;
+    }
+    tween._value = value;
+    return tween;
+  }
+
+  function attrTween(name, value) {
+    var t0, i0;
+    function tween() {
+      var i = value.apply(this, arguments);
+      if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+      return t0;
+    }
+    tween._value = value;
+    return tween;
+  }
+
+  function transition_attrTween(name, value) {
+    var key = "attr." + name;
+    if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+    if (value == null) return this.tween(key, null);
+    if (typeof value !== "function") throw new Error;
+    var fullname = namespace(name);
+    return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+  }
+
+  function delayFunction(id, value) {
+    return function() {
+      init(this, id).delay = +value.apply(this, arguments);
+    };
+  }
+
+  function delayConstant(id, value) {
+    return value = +value, function() {
+      init(this, id).delay = value;
+    };
+  }
+
+  function transition_delay(value) {
+    var id = this._id;
+
+    return arguments.length
+        ? this.each((typeof value === "function"
+            ? delayFunction
+            : delayConstant)(id, value))
+        : get$1(this.node(), id).delay;
+  }
+
+  function durationFunction(id, value) {
+    return function() {
+      set$2(this, id).duration = +value.apply(this, arguments);
+    };
+  }
+
+  function durationConstant(id, value) {
+    return value = +value, function() {
+      set$2(this, id).duration = value;
+    };
+  }
+
+  function transition_duration(value) {
+    var id = this._id;
+
+    return arguments.length
+        ? this.each((typeof value === "function"
+            ? durationFunction
+            : durationConstant)(id, value))
+        : get$1(this.node(), id).duration;
+  }
+
+  function easeConstant(id, value) {
+    if (typeof value !== "function") throw new Error;
+    return function() {
+      set$2(this, id).ease = value;
+    };
+  }
+
+  function transition_ease(value) {
+    var id = this._id;
+
+    return arguments.length
+        ? this.each(easeConstant(id, value))
+        : get$1(this.node(), id).ease;
+  }
+
+  function transition_filter(match) {
+    if (typeof match !== "function") match = matcher(match);
+
+    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+        if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+          subgroup.push(node);
+        }
+      }
+    }
+
+    return new Transition(subgroups, this._parents, this._name, this._id);
+  }
+
+  function transition_merge(transition) {
+    if (transition._id !== this._id) throw new Error;
+
+    for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+      for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+        if (node = group0[i] || group1[i]) {
+          merge[i] = node;
+        }
+      }
+    }
+
+    for (; j < m0; ++j) {
+      merges[j] = groups0[j];
+    }
+
+    return new Transition(merges, this._parents, this._name, this._id);
+  }
+
+  function start(name) {
+    return (name + "").trim().split(/^|\s+/).every(function(t) {
+      var i = t.indexOf(".");
+      if (i >= 0) t = t.slice(0, i);
+      return !t || t === "start";
+    });
+  }
+
+  function onFunction(id, name, listener) {
+    var on0, on1, sit = start(name) ? init : set$2;
+    return function() {
+      var schedule = sit(this, id),
+          on = schedule.on;
+
+      // If this node shared a dispatch with the previous node,
+      // just assign the updated shared dispatch and we’re done!
+      // Otherwise, copy-on-write.
+      if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+
+      schedule.on = on1;
+    };
+  }
+
+  function transition_on(name, listener) {
+    var id = this._id;
+
+    return arguments.length < 2
+        ? get$1(this.node(), id).on.on(name)
+        : this.each(onFunction(id, name, listener));
+  }
+
+  function removeFunction(id) {
+    return function() {
+      var parent = this.parentNode;
+      for (var i in this.__transition) if (+i !== id) return;
+      if (parent) parent.removeChild(this);
+    };
+  }
+
+  function transition_remove() {
+    return this.on("end.remove", removeFunction(this._id));
+  }
+
+  function transition_select(select) {
+    var name = this._name,
+        id = this._id;
+
+    if (typeof select !== "function") select = selector(select);
+
+    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+        if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+          if ("__data__" in node) subnode.__data__ = node.__data__;
+          subgroup[i] = subnode;
+          schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
+        }
+      }
+    }
+
+    return new Transition(subgroups, this._parents, name, id);
+  }
+
+  function transition_selectAll(select) {
+    var name = this._name,
+        id = this._id;
+
+    if (typeof select !== "function") select = selectorAll(select);
+
+    for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+        if (node = group[i]) {
+          for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+            if (child = children[k]) {
+              schedule(child, name, id, k, children, inherit);
+            }
+          }
+          subgroups.push(children);
+          parents.push(node);
+        }
+      }
+    }
+
+    return new Transition(subgroups, parents, name, id);
+  }
+
+  var Selection$1 = selection.prototype.constructor;
+
+  function transition_selection() {
+    return new Selection$1(this._groups, this._parents);
+  }
+
+  function styleNull(name, interpolate) {
+    var string00,
+        string10,
+        interpolate0;
+    return function() {
+      var string0 = styleValue(this, name),
+          string1 = (this.style.removeProperty(name), styleValue(this, name));
+      return string0 === string1 ? null
+          : string0 === string00 && string1 === string10 ? interpolate0
+          : interpolate0 = interpolate(string00 = string0, string10 = string1);
+    };
+  }
+
+  function styleRemove$1(name) {
+    return function() {
+      this.style.removeProperty(name);
+    };
+  }
+
+  function styleConstant$1(name, interpolate, value1) {
+    var string00,
+        string1 = value1 + "",
+        interpolate0;
+    return function() {
+      var string0 = styleValue(this, name);
+      return string0 === string1 ? null
+          : string0 === string00 ? interpolate0
+          : interpolate0 = interpolate(string00 = string0, value1);
+    };
+  }
+
+  function styleFunction$1(name, interpolate, value) {
+    var string00,
+        string10,
+        interpolate0;
+    return function() {
+      var string0 = styleValue(this, name),
+          value1 = value(this),
+          string1 = value1 + "";
+      if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
+      return string0 === string1 ? null
+          : string0 === string00 && string1 === string10 ? interpolate0
+          : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+    };
+  }
+
+  function styleMaybeRemove(id, name) {
+    var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
+    return function() {
+      var schedule = set$2(this, id),
+          on = schedule.on,
+          listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
+
+      // If this node shared a dispatch with the previous node,
+      // just assign the updated shared dispatch and we’re done!
+      // Otherwise, copy-on-write.
+      if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+
+      schedule.on = on1;
+    };
+  }
+
+  function transition_style(name, value, priority) {
+    var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
+    return value == null ? this
+        .styleTween(name, styleNull(name, i))
+        .on("end.style." + name, styleRemove$1(name))
+      : typeof value === "function" ? this
+        .styleTween(name, styleFunction$1(name, i, tweenValue(this, "style." + name, value)))
+        .each(styleMaybeRemove(this._id, name))
+      : this
+        .styleTween(name, styleConstant$1(name, i, value), priority)
+        .on("end.style." + name, null);
+  }
+
+  function styleInterpolate(name, i, priority) {
+    return function(t) {
+      this.style.setProperty(name, i(t), priority);
+    };
+  }
+
+  function styleTween(name, value, priority) {
+    var t, i0;
+    function tween() {
+      var i = value.apply(this, arguments);
+      if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
+      return t;
+    }
+    tween._value = value;
+    return tween;
+  }
+
+  function transition_styleTween(name, value, priority) {
+    var key = "style." + (name += "");
+    if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+    if (value == null) return this.tween(key, null);
+    if (typeof value !== "function") throw new Error;
+    return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+  }
+
+  function textConstant$1(value) {
+    return function() {
+      this.textContent = value;
+    };
+  }
+
+  function textFunction$1(value) {
+    return function() {
+      var value1 = value(this);
+      this.textContent = value1 == null ? "" : value1;
+    };
+  }
+
+  function transition_text(value) {
+    return this.tween("text", typeof value === "function"
+        ? textFunction$1(tweenValue(this, "text", value))
+        : textConstant$1(value == null ? "" : value + ""));
+  }
+
+  function transition_transition() {
+    var name = this._name,
+        id0 = this._id,
+        id1 = newId();
+
+    for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+        if (node = group[i]) {
+          var inherit = get$1(node, id0);
+          schedule(node, name, id1, i, group, {
+            time: inherit.time + inherit.delay + inherit.duration,
+            delay: 0,
+            duration: inherit.duration,
+            ease: inherit.ease
+          });
+        }
+      }
+    }
+
+    return new Transition(groups, this._parents, name, id1);
+  }
+
+  function transition_end() {
+    var on0, on1, that = this, id = that._id, size = that.size();
+    return new Promise(function(resolve, reject) {
+      var cancel = {value: reject},
+          end = {value: function() { if (--size === 0) resolve(); }};
+
+      that.each(function() {
+        var schedule = set$2(this, id),
+            on = schedule.on;
+
+        // If this node shared a dispatch with the previous node,
+        // just assign the updated shared dispatch and we’re done!
+        // Otherwise, copy-on-write.
+        if (on !== on0) {
+          on1 = (on0 = on).copy();
+          on1._.cancel.push(cancel);
+          on1._.interrupt.push(cancel);
+          on1._.end.push(end);
+        }
+
+        schedule.on = on1;
+      });
+    });
+  }
+
+  var id = 0;
+
+  function Transition(groups, parents, name, id) {
+    this._groups = groups;
+    this._parents = parents;
+    this._name = name;
+    this._id = id;
+  }
+
+  function transition(name) {
+    return selection().transition(name);
+  }
+
+  function newId() {
+    return ++id;
+  }
+
+  var selection_prototype = selection.prototype;
+
+  Transition.prototype = transition.prototype = {
+    constructor: Transition,
+    select: transition_select,
+    selectAll: transition_selectAll,
+    filter: transition_filter,
+    merge: transition_merge,
+    selection: transition_selection,
+    transition: transition_transition,
+    call: selection_prototype.call,
+    nodes: selection_prototype.nodes,
+    node: selection_prototype.node,
+    size: selection_prototype.size,
+    empty: selection_prototype.empty,
+    each: selection_prototype.each,
+    on: transition_on,
+    attr: transition_attr,
+    attrTween: transition_attrTween,
+    style: transition_style,
+    styleTween: transition_styleTween,
+    text: transition_text,
+    remove: transition_remove,
+    tween: transition_tween,
+    delay: transition_delay,
+    duration: transition_duration,
+    ease: transition_ease,
+    end: transition_end
+  };
+
+  function cubicInOut(t) {
+    return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+  }
+
+  var pi = Math.PI;
+
+  var tau = 2 * Math.PI;
+
+  var defaultTiming = {
+    time: null, // Set on use.
+    delay: 0,
+    duration: 250,
+    ease: cubicInOut
+  };
+
+  function inherit(node, id) {
+    var timing;
+    while (!(timing = node.__transition) || !(timing = timing[id])) {
+      if (!(node = node.parentNode)) {
+        return defaultTiming.time = now(), defaultTiming;
+      }
+    }
+    return timing;
+  }
+
+  function selection_transition(name) {
+    var id,
+        timing;
+
+    if (name instanceof Transition) {
+      id = name._id, name = name._name;
+    } else {
+      id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+    }
+
+    for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+      for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+        if (node = group[i]) {
+          schedule(node, name, id, i, group, timing || inherit(node, id));
+        }
+      }
+    }
+
+    return new Transition(groups, this._parents, name, id);
+  }
+
+  selection.prototype.interrupt = selection_interrupt;
+  selection.prototype.transition = selection_transition;
+
+  function constant$3(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  function ZoomEvent(target, type, transform) {
+    this.target = target;
+    this.type = type;
+    this.transform = transform;
+  }
+
+  function Transform(k, x, y) {
+    this.k = k;
+    this.x = x;
+    this.y = y;
+  }
+
+  Transform.prototype = {
+    constructor: Transform,
+    scale: function(k) {
+      return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+    },
+    translate: function(x, y) {
+      return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+    },
+    apply: function(point) {
+      return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+    },
+    applyX: function(x) {
+      return x * this.k + this.x;
+    },
+    applyY: function(y) {
+      return y * this.k + this.y;
+    },
+    invert: function(location) {
+      return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+    },
+    invertX: function(x) {
+      return (x - this.x) / this.k;
+    },
+    invertY: function(y) {
+      return (y - this.y) / this.k;
+    },
+    rescaleX: function(x) {
+      return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+    },
+    rescaleY: function(y) {
+      return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+    },
+    toString: function() {
+      return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+    }
+  };
+
+  var identity$1 = new Transform(1, 0, 0);
+
+  function nopropagation$1() {
+    event.stopImmediatePropagation();
+  }
+
+  function noevent$1() {
+    event.preventDefault();
+    event.stopImmediatePropagation();
+  }
+
+  // Ignore right-click, since that should open the context menu.
+  function defaultFilter$1() {
+    return !event.button;
+  }
+
+  function defaultExtent() {
+    var e = this, w, h;
+    if (e instanceof SVGElement) {
+      e = e.ownerSVGElement || e;
+      w = e.width.baseVal.value;
+      h = e.height.baseVal.value;
+    } else {
+      w = e.clientWidth;
+      h = e.clientHeight;
+    }
+    return [[0, 0], [w, h]];
+  }
+
+  function defaultTransform() {
+    return this.__zoom || identity$1;
+  }
+
+  function defaultWheelDelta() {
+    return -event.deltaY * (event.deltaMode ? 120 : 1) / 500;
+  }
+
+  function defaultTouchable$1() {
+    return "ontouchstart" in this;
+  }
+
+  function defaultConstrain(transform, extent, translateExtent) {
+    var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+        dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+        dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+        dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+    return transform.translate(
+      dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
+      dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
+    );
+  }
+
+  function zoom() {
+    var filter = defaultFilter$1,
+        extent = defaultExtent,
+        constrain = defaultConstrain,
+        wheelDelta = defaultWheelDelta,
+        touchable = defaultTouchable$1,
+        scaleExtent = [0, Infinity],
+        translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+        duration = 250,
+        interpolate = interpolateZoom,
+        gestures = [],
+        listeners = dispatch("start", "zoom", "end"),
+        touchstarting,
+        touchending,
+        touchDelay = 500,
+        wheelDelay = 150,
+        clickDistance2 = 0;
+
+    function zoom(selection) {
+      selection
+          .property("__zoom", defaultTransform)
+          .on("wheel.zoom", wheeled)
+          .on("mousedown.zoom", mousedowned)
+          .on("dblclick.zoom", dblclicked)
+        .filter(touchable)
+          .on("touchstart.zoom", touchstarted)
+          .on("touchmove.zoom", touchmoved)
+          .on("touchend.zoom touchcancel.zoom", touchended)
+          .style("touch-action", "none")
+          .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+    }
+
+    zoom.transform = function(collection, transform) {
+      var selection = collection.selection ? collection.selection() : collection;
+      selection.property("__zoom", defaultTransform);
+      if (collection !== selection) {
+        schedule(collection, transform);
+      } else {
+        selection.interrupt().each(function() {
+          gesture(this, arguments)
+              .start()
+              .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
+              .end();
+        });
+      }
+    };
+
+    zoom.scaleBy = function(selection, k) {
+      zoom.scaleTo(selection, function() {
+        var k0 = this.__zoom.k,
+            k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+        return k0 * k1;
+      });
+    };
+
+    zoom.scaleTo = function(selection, k) {
+      zoom.transform(selection, function() {
+        var e = extent.apply(this, arguments),
+            t0 = this.__zoom,
+            p0 = centroid(e),
+            p1 = t0.invert(p0),
+            k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+        return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+      });
+    };
+
+    zoom.translateBy = function(selection, x, y) {
+      zoom.transform(selection, function() {
+        return constrain(this.__zoom.translate(
+          typeof x === "function" ? x.apply(this, arguments) : x,
+          typeof y === "function" ? y.apply(this, arguments) : y
+        ), extent.apply(this, arguments), translateExtent);
+      });
+    };
+
+    zoom.translateTo = function(selection, x, y) {
+      zoom.transform(selection, function() {
+        var e = extent.apply(this, arguments),
+            t = this.__zoom,
+            p = centroid(e);
+        return constrain(identity$1.translate(p[0], p[1]).scale(t.k).translate(
+          typeof x === "function" ? -x.apply(this, arguments) : -x,
+          typeof y === "function" ? -y.apply(this, arguments) : -y
+        ), e, translateExtent);
+      });
+    };
+
+    function scale(transform, k) {
+      k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+      return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+    }
+
+    function translate(transform, p0, p1) {
+      var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
+      return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+    }
+
+    function centroid(extent) {
+      return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+    }
+
+    function schedule(transition, transform, center) {
+      transition
+          .on("start.zoom", function() { gesture(this, arguments).start(); })
+          .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
+          .tween("zoom", function() {
+            var that = this,
+                args = arguments,
+                g = gesture(that, args),
+                e = extent.apply(that, args),
+                p = center || centroid(e),
+                w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+                a = that.__zoom,
+                b = typeof transform === "function" ? transform.apply(that, args) : transform,
+                i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+            return function(t) {
+              if (t === 1) t = b; // Avoid rounding error on end.
+              else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
+              g.zoom(null, t);
+            };
+          });
+    }
+
+    function gesture(that, args) {
+      for (var i = 0, n = gestures.length, g; i < n; ++i) {
+        if ((g = gestures[i]).that === that) {
+          return g;
+        }
+      }
+      return new Gesture(that, args);
+    }
+
+    function Gesture(that, args) {
+      this.that = that;
+      this.args = args;
+      this.index = -1;
+      this.active = 0;
+      this.extent = extent.apply(that, args);
+    }
+
+    Gesture.prototype = {
+      start: function() {
+        if (++this.active === 1) {
+          this.index = gestures.push(this) - 1;
+          this.emit("start");
+        }
+        return this;
+      },
+      zoom: function(key, transform) {
+        if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+        if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+        if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+        this.that.__zoom = transform;
+        this.emit("zoom");
+        return this;
+      },
+      end: function() {
+        if (--this.active === 0) {
+          gestures.splice(this.index, 1);
+          this.index = -1;
+          this.emit("end");
+        }
+        return this;
+      },
+      emit: function(type) {
+        customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
+      }
+    };
+
+    function wheeled() {
+      if (!filter.apply(this, arguments)) return;
+      var g = gesture(this, arguments),
+          t = this.__zoom,
+          k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+          p = mouse(this);
+
+      // If the mouse is in the same location as before, reuse it.
+      // If there were recent wheel events, reset the wheel idle timeout.
+      if (g.wheel) {
+        if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+          g.mouse[1] = t.invert(g.mouse[0] = p);
+        }
+        clearTimeout(g.wheel);
+      }
+
+      // If this wheel event won’t trigger a transform change, ignore it.
+      else if (t.k === k) return;
+
+      // Otherwise, capture the mouse point and location at the start.
+      else {
+        g.mouse = [p, t.invert(p)];
+        interrupt(this);
+        g.start();
+      }
+
+      noevent$1();
+      g.wheel = setTimeout(wheelidled, wheelDelay);
+      g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+
+      function wheelidled() {
+        g.wheel = null;
+        g.end();
+      }
+    }
+
+    function mousedowned() {
+      if (touchending || !filter.apply(this, arguments)) return;
+      var g = gesture(this, arguments),
+          v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+          p = mouse(this),
+          x0 = event.clientX,
+          y0 = event.clientY;
+
+      dragDisable(event.view);
+      nopropagation$1();
+      g.mouse = [p, this.__zoom.invert(p)];
+      interrupt(this);
+      g.start();
+
+      function mousemoved() {
+        noevent$1();
+        if (!g.moved) {
+          var dx = event.clientX - x0, dy = event.clientY - y0;
+          g.moved = dx * dx + dy * dy > clickDistance2;
+        }
+        g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent, translateExtent));
+      }
+
+      function mouseupped() {
+        v.on("mousemove.zoom mouseup.zoom", null);
+        yesdrag(event.view, g.moved);
+        noevent$1();
+        g.end();
+      }
+    }
+
+    function dblclicked() {
+      if (!filter.apply(this, arguments)) return;
+      var t0 = this.__zoom,
+          p0 = mouse(this),
+          p1 = t0.invert(p0),
+          k1 = t0.k * (event.shiftKey ? 0.5 : 2),
+          t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments), translateExtent);
+
+      noevent$1();
+      if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);
+      else select(this).call(zoom.transform, t1);
+    }
+
+    function touchstarted() {
+      if (!filter.apply(this, arguments)) return;
+      var g = gesture(this, arguments),
+          touches = event.changedTouches,
+          started,
+          n = touches.length, i, t, p;
+
+      nopropagation$1();
+      for (i = 0; i < n; ++i) {
+        t = touches[i], p = touch(this, touches, t.identifier);
+        p = [p, this.__zoom.invert(p), t.identifier];
+        if (!g.touch0) g.touch0 = p, started = true;
+        else if (!g.touch1) g.touch1 = p;
+      }
+
+      // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.
+      if (touchstarting) {
+        touchstarting = clearTimeout(touchstarting);
+        if (!g.touch1) {
+          g.end();
+          p = select(this).on("dblclick.zoom");
+          if (p) p.apply(this, arguments);
+          return;
+        }
+      }
+
+      if (started) {
+        touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
+        interrupt(this);
+        g.start();
+      }
+    }
+
+    function touchmoved() {
+      var g = gesture(this, arguments),
+          touches = event.changedTouches,
+          n = touches.length, i, t, p, l;
+
+      noevent$1();
+      if (touchstarting) touchstarting = clearTimeout(touchstarting);
+      for (i = 0; i < n; ++i) {
+        t = touches[i], p = touch(this, touches, t.identifier);
+        if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
+        else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
+      }
+      t = g.that.__zoom;
+      if (g.touch1) {
+        var p0 = g.touch0[0], l0 = g.touch0[1],
+            p1 = g.touch1[0], l1 = g.touch1[1],
+            dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+            dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+        t = scale(t, Math.sqrt(dp / dl));
+        p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+        l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+      }
+      else if (g.touch0) p = g.touch0[0], l = g.touch0[1];
+      else return;
+      g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+    }
+
+    function touchended() {
+      var g = gesture(this, arguments),
+          touches = event.changedTouches,
+          n = touches.length, i, t;
+
+      nopropagation$1();
+      if (touchending) clearTimeout(touchending);
+      touchending = setTimeout(function() { touchending = null; }, touchDelay);
+      for (i = 0; i < n; ++i) {
+        t = touches[i];
+        if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
+        else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
+      }
+      if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+      if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);
+      else g.end();
+    }
+
+    zoom.wheelDelta = function(_) {
+      return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
+    };
+
+    zoom.filter = function(_) {
+      return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
+    };
+
+    zoom.touchable = function(_) {
+      return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
+    };
+
+    zoom.extent = function(_) {
+      return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+    };
+
+    zoom.scaleExtent = function(_) {
+      return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+    };
+
+    zoom.translateExtent = function(_) {
+      return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+    };
+
+    zoom.constrain = function(_) {
+      return arguments.length ? (constrain = _, zoom) : constrain;
+    };
+
+    zoom.duration = function(_) {
+      return arguments.length ? (duration = +_, zoom) : duration;
+    };
+
+    zoom.interpolate = function(_) {
+      return arguments.length ? (interpolate = _, zoom) : interpolate;
+    };
+
+    zoom.on = function() {
+      var value = listeners.on.apply(listeners, arguments);
+      return value === listeners ? zoom : value;
+    };
+
+    zoom.clickDistance = function(_) {
+      return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+    };
+
+    return zoom;
+  }
+
+  function tree_add(d) {
+    var x = +this._x.call(null, d),
+        y = +this._y.call(null, d);
+    return add(this.cover(x, y), x, y, d);
+  }
+
+  function add(tree, x, y, d) {
+    if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points
+
+    var parent,
+        node = tree._root,
+        leaf = {data: d},
+        x0 = tree._x0,
+        y0 = tree._y0,
+        x1 = tree._x1,
+        y1 = tree._y1,
+        xm,
+        ym,
+        xp,
+        yp,
+        right,
+        bottom,
+        i,
+        j;
+
+    // If the tree is empty, initialize the root as a leaf.
+    if (!node) return tree._root = leaf, tree;
+
+    // Find the existing leaf for the new point, or add it.
+    while (node.length) {
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+      if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
+    }
+
+    // Is the new point is exactly coincident with the existing point?
+    xp = +tree._x.call(null, node.data);
+    yp = +tree._y.call(null, node.data);
+    if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;
+
+    // Otherwise, split the leaf node until the old and new point are separated.
+    do {
+      parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+    } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
+    return parent[j] = node, parent[i] = leaf, tree;
+  }
+
+  function addAll(data) {
+    var d, i, n = data.length,
+        x,
+        y,
+        xz = new Array(n),
+        yz = new Array(n),
+        x0 = Infinity,
+        y0 = Infinity,
+        x1 = -Infinity,
+        y1 = -Infinity;
+
+    // Compute the points and their extent.
+    for (i = 0; i < n; ++i) {
+      if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
+      xz[i] = x;
+      yz[i] = y;
+      if (x < x0) x0 = x;
+      if (x > x1) x1 = x;
+      if (y < y0) y0 = y;
+      if (y > y1) y1 = y;
+    }
+
+    // If there were no (valid) points, abort.
+    if (x0 > x1 || y0 > y1) return this;
+
+    // Expand the tree to cover the new points.
+    this.cover(x0, y0).cover(x1, y1);
+
+    // Add the new points.
+    for (i = 0; i < n; ++i) {
+      add(this, xz[i], yz[i], data[i]);
+    }
+
+    return this;
+  }
+
+  function tree_cover(x, y) {
+    if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points
+
+    var x0 = this._x0,
+        y0 = this._y0,
+        x1 = this._x1,
+        y1 = this._y1;
+
+    // If the quadtree has no extent, initialize them.
+    // Integer extent are necessary so that if we later double the extent,
+    // the existing quadrant boundaries don’t change due to floating point error!
+    if (isNaN(x0)) {
+      x1 = (x0 = Math.floor(x)) + 1;
+      y1 = (y0 = Math.floor(y)) + 1;
+    }
+
+    // Otherwise, double repeatedly to cover.
+    else {
+      var z = x1 - x0,
+          node = this._root,
+          parent,
+          i;
+
+      while (x0 > x || x >= x1 || y0 > y || y >= y1) {
+        i = (y < y0) << 1 | (x < x0);
+        parent = new Array(4), parent[i] = node, node = parent, z *= 2;
+        switch (i) {
+          case 0: x1 = x0 + z, y1 = y0 + z; break;
+          case 1: x0 = x1 - z, y1 = y0 + z; break;
+          case 2: x1 = x0 + z, y0 = y1 - z; break;
+          case 3: x0 = x1 - z, y0 = y1 - z; break;
+        }
+      }
+
+      if (this._root && this._root.length) this._root = node;
+    }
+
+    this._x0 = x0;
+    this._y0 = y0;
+    this._x1 = x1;
+    this._y1 = y1;
+    return this;
+  }
+
+  function tree_data() {
+    var data = [];
+    this.visit(function(node) {
+      if (!node.length) do data.push(node.data); while (node = node.next)
+    });
+    return data;
+  }
+
+  function tree_extent(_) {
+    return arguments.length
+        ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
+        : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
+  }
+
+  function Quad(node, x0, y0, x1, y1) {
+    this.node = node;
+    this.x0 = x0;
+    this.y0 = y0;
+    this.x1 = x1;
+    this.y1 = y1;
+  }
+
+  function tree_find(x, y, radius) {
+    var data,
+        x0 = this._x0,
+        y0 = this._y0,
+        x1,
+        y1,
+        x2,
+        y2,
+        x3 = this._x1,
+        y3 = this._y1,
+        quads = [],
+        node = this._root,
+        q,
+        i;
+
+    if (node) quads.push(new Quad(node, x0, y0, x3, y3));
+    if (radius == null) radius = Infinity;
+    else {
+      x0 = x - radius, y0 = y - radius;
+      x3 = x + radius, y3 = y + radius;
+      radius *= radius;
+    }
+
+    while (q = quads.pop()) {
+
+      // Stop searching if this quadrant can’t contain a closer node.
+      if (!(node = q.node)
+          || (x1 = q.x0) > x3
+          || (y1 = q.y0) > y3
+          || (x2 = q.x1) < x0
+          || (y2 = q.y1) < y0) continue;
+
+      // Bisect the current quadrant.
+      if (node.length) {
+        var xm = (x1 + x2) / 2,
+            ym = (y1 + y2) / 2;
+
+        quads.push(
+          new Quad(node[3], xm, ym, x2, y2),
+          new Quad(node[2], x1, ym, xm, y2),
+          new Quad(node[1], xm, y1, x2, ym),
+          new Quad(node[0], x1, y1, xm, ym)
+        );
+
+        // Visit the closest quadrant first.
+        if (i = (y >= ym) << 1 | (x >= xm)) {
+          q = quads[quads.length - 1];
+          quads[quads.length - 1] = quads[quads.length - 1 - i];
+          quads[quads.length - 1 - i] = q;
+        }
+      }
+
+      // Visit this point. (Visiting coincident points isn’t necessary!)
+      else {
+        var dx = x - +this._x.call(null, node.data),
+            dy = y - +this._y.call(null, node.data),
+            d2 = dx * dx + dy * dy;
+        if (d2 < radius) {
+          var d = Math.sqrt(radius = d2);
+          x0 = x - d, y0 = y - d;
+          x3 = x + d, y3 = y + d;
+          data = node.data;
+        }
+      }
+    }
+
+    return data;
+  }
+
+  function tree_remove(d) {
+    if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points
+
+    var parent,
+        node = this._root,
+        retainer,
+        previous,
+        next,
+        x0 = this._x0,
+        y0 = this._y0,
+        x1 = this._x1,
+        y1 = this._y1,
+        x,
+        y,
+        xm,
+        ym,
+        right,
+        bottom,
+        i,
+        j;
+
+    // If the tree is empty, initialize the root as a leaf.
+    if (!node) return this;
+
+    // Find the leaf node for the point.
+    // While descending, also retain the deepest parent with a non-removed sibling.
+    if (node.length) while (true) {
+      if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
+      if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
+      if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
+      if (!node.length) break;
+      if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
+    }
+
+    // Find the point to remove.
+    while (node.data !== d) if (!(previous = node, node = node.next)) return this;
+    if (next = node.next) delete node.next;
+
+    // If there are multiple coincident points, remove just the point.
+    if (previous) return (next ? previous.next = next : delete previous.next), this;
+
+    // If this is the root point, remove it.
+    if (!parent) return this._root = next, this;
+
+    // Remove this leaf.
+    next ? parent[i] = next : delete parent[i];
+
+    // If the parent now contains exactly one leaf, collapse superfluous parents.
+    if ((node = parent[0] || parent[1] || parent[2] || parent[3])
+        && node === (parent[3] || parent[2] || parent[1] || parent[0])
+        && !node.length) {
+      if (retainer) retainer[j] = node;
+      else this._root = node;
+    }
+
+    return this;
+  }
+
+  function removeAll(data) {
+    for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
+    return this;
+  }
+
+  function tree_root() {
+    return this._root;
+  }
+
+  function tree_size() {
+    var size = 0;
+    this.visit(function(node) {
+      if (!node.length) do ++size; while (node = node.next)
+    });
+    return size;
+  }
+
+  function tree_visit(callback) {
+    var quads = [], q, node = this._root, child, x0, y0, x1, y1;
+    if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
+    while (q = quads.pop()) {
+      if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
+        var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+        if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+        if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+        if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+        if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+      }
+    }
+    return this;
+  }
+
+  function tree_visitAfter(callback) {
+    var quads = [], next = [], q;
+    if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
+    while (q = quads.pop()) {
+      var node = q.node;
+      if (node.length) {
+        var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
+        if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
+        if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
+        if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
+        if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
+      }
+      next.push(q);
+    }
+    while (q = next.pop()) {
+      callback(q.node, q.x0, q.y0, q.x1, q.y1);
+    }
+    return this;
+  }
+
+  function defaultX(d) {
+    return d[0];
+  }
+
+  function tree_x(_) {
+    return arguments.length ? (this._x = _, this) : this._x;
+  }
+
+  function defaultY(d) {
+    return d[1];
+  }
+
+  function tree_y(_) {
+    return arguments.length ? (this._y = _, this) : this._y;
+  }
+
+  function quadtree(nodes, x, y) {
+    var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
+    return nodes == null ? tree : tree.addAll(nodes);
+  }
+
+  function Quadtree(x, y, x0, y0, x1, y1) {
+    this._x = x;
+    this._y = y;
+    this._x0 = x0;
+    this._y0 = y0;
+    this._x1 = x1;
+    this._y1 = y1;
+    this._root = undefined;
+  }
+
+  function leaf_copy(leaf) {
+    var copy = {data: leaf.data}, next = copy;
+    while (leaf = leaf.next) next = next.next = {data: leaf.data};
+    return copy;
+  }
+
+  var treeProto = quadtree.prototype = Quadtree.prototype;
+
+  treeProto.copy = function() {
+    var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
+        node = this._root,
+        nodes,
+        child;
+
+    if (!node) return copy;
+
+    if (!node.length) return copy._root = leaf_copy(node), copy;
+
+    nodes = [{source: node, target: copy._root = new Array(4)}];
+    while (node = nodes.pop()) {
+      for (var i = 0; i < 4; ++i) {
+        if (child = node.source[i]) {
+          if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
+          else node.target[i] = leaf_copy(child);
+        }
+      }
+    }
+
+    return copy;
+  };
+
+  treeProto.add = tree_add;
+  treeProto.addAll = addAll;
+  treeProto.cover = tree_cover;
+  treeProto.data = tree_data;
+  treeProto.extent = tree_extent;
+  treeProto.find = tree_find;
+  treeProto.remove = tree_remove;
+  treeProto.removeAll = removeAll;
+  treeProto.root = tree_root;
+  treeProto.size = tree_size;
+  treeProto.visit = tree_visit;
+  treeProto.visitAfter = tree_visitAfter;
+  treeProto.x = tree_x;
+  treeProto.y = tree_y;
+
+  function constant$4(x) {
+    return function() {
+      return x;
+    };
+  }
+
+  function jiggle() {
+    return (Math.random() - 0.5) * 1e-6;
+  }
+
+  function index(d) {
+    return d.index;
+  }
+
+  function find(nodeById, nodeId) {
+    var node = nodeById.get(nodeId);
+    if (!node) throw new Error("missing: " + nodeId);
+    return node;
+  }
+
+  function forceLink(links) {
+    var id = index,
+        strength = defaultStrength,
+        strengths,
+        distance = constant$4(30),
+        distances,
+        nodes,
+        count,
+        bias,
+        iterations = 1;
+
+    if (links == null) links = [];
+
+    function defaultStrength(link) {
+      return 1 / Math.min(count[link.source.index], count[link.target.index]);
+    }
+
+    function force(alpha) {
+      for (var k = 0, n = links.length; k < iterations; ++k) {
+        for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
+          link = links[i], source = link.source, target = link.target;
+          x = target.x + target.vx - source.x - source.vx || jiggle();
+          y = target.y + target.vy - source.y - source.vy || jiggle();
+          l = Math.sqrt(x * x + y * y);
+          l = (l - distances[i]) / l * alpha * strengths[i];
+          x *= l, y *= l;
+          target.vx -= x * (b = bias[i]);
+          target.vy -= y * b;
+          source.vx += x * (b = 1 - b);
+          source.vy += y * b;
+        }
+      }
+    }
+
+    function initialize() {
+      if (!nodes) return;
+
+      var i,
+          n = nodes.length,
+          m = links.length,
+          nodeById = new Map(nodes.map((d, i) => [id(d, i, nodes), d])),
+          link;
+
+      for (i = 0, count = new Array(n); i < m; ++i) {
+        link = links[i], link.index = i;
+        if (typeof link.source !== "object") link.source = find(nodeById, link.source);
+        if (typeof link.target !== "object") link.target = find(nodeById, link.target);
+        count[link.source.index] = (count[link.source.index] || 0) + 1;
+        count[link.target.index] = (count[link.target.index] || 0) + 1;
+      }
+
+      for (i = 0, bias = new Array(m); i < m; ++i) {
+        link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
+      }
+
+      strengths = new Array(m), initializeStrength();
+      distances = new Array(m), initializeDistance();
+    }
+
+    function initializeStrength() {
+      if (!nodes) return;
+
+      for (var i = 0, n = links.length; i < n; ++i) {
+        strengths[i] = +strength(links[i], i, links);
+      }
+    }
+
+    function initializeDistance() {
+      if (!nodes) return;
+
+      for (var i = 0, n = links.length; i < n; ++i) {
+        distances[i] = +distance(links[i], i, links);
+      }
+    }
+
+    force.initialize = function(_) {
+      nodes = _;
+      initialize();
+    };
+
+    force.links = function(_) {
+      return arguments.length ? (links = _, initialize(), force) : links;
+    };
+
+    force.id = function(_) {
+      return arguments.length ? (id = _, force) : id;
+    };
+
+    force.iterations = function(_) {
+      return arguments.length ? (iterations = +_, force) : iterations;
+    };
+
+    force.strength = function(_) {
+      return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initializeStrength(), force) : strength;
+    };
+
+    force.distance = function(_) {
+      return arguments.length ? (distance = typeof _ === "function" ? _ : constant$4(+_), initializeDistance(), force) : distance;
+    };
+
+    return force;
+  }
+
+  function x(d) {
+    return d.x;
+  }
+
+  function y(d) {
+    return d.y;
+  }
+
+  var initialRadius = 10,
+      initialAngle = Math.PI * (3 - Math.sqrt(5));
+
+  function forceSimulation(nodes) {
+    var simulation,
+        alpha = 1,
+        alphaMin = 0.001,
+        alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
+        alphaTarget = 0,
+        velocityDecay = 0.6,
+        forces = new Map(),
+        stepper = timer(step),
+        event = dispatch("tick", "end");
+
+    if (nodes == null) nodes = [];
+
+    function step() {
+      tick();
+      event.call("tick", simulation);
+      if (alpha < alphaMin) {
+        stepper.stop();
+        event.call("end", simulation);
+      }
+    }
+
+    function tick(iterations) {
+      var i, n = nodes.length, node;
+
+      if (iterations === undefined) iterations = 1;
+
+      for (var k = 0; k < iterations; ++k) {
+        alpha += (alphaTarget - alpha) * alphaDecay;
+
+        forces.forEach(function(force) {
+          force(alpha);
+        });
+
+        for (i = 0; i < n; ++i) {
+          node = nodes[i];
+          if (node.fx == null) node.x += node.vx *= velocityDecay;
+          else node.x = node.fx, node.vx = 0;
+          if (node.fy == null) node.y += node.vy *= velocityDecay;
+          else node.y = node.fy, node.vy = 0;
+        }
+      }
+
+      return simulation;
+    }
+
+    function initializeNodes() {
+      for (var i = 0, n = nodes.length, node; i < n; ++i) {
+        node = nodes[i], node.index = i;
+        if (node.fx != null) node.x = node.fx;
+        if (node.fy != null) node.y = node.fy;
+        if (isNaN(node.x) || isNaN(node.y)) {
+          var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;
+          node.x = radius * Math.cos(angle);
+          node.y = radius * Math.sin(angle);
+        }
+        if (isNaN(node.vx) || isNaN(node.vy)) {
+          node.vx = node.vy = 0;
+        }
+      }
+    }
+
+    function initializeForce(force) {
+      if (force.initialize) force.initialize(nodes);
+      return force;
+    }
+
+    initializeNodes();
+
+    return simulation = {
+      tick: tick,
+
+      restart: function() {
+        return stepper.restart(step), simulation;
+      },
+
+      stop: function() {
+        return stepper.stop(), simulation;
+      },
+
+      nodes: function(_) {
+        return arguments.length ? (nodes = _, initializeNodes(), forces.forEach(initializeForce), simulation) : nodes;
+      },
+
+      alpha: function(_) {
+        return arguments.length ? (alpha = +_, simulation) : alpha;
+      },
+
+      alphaMin: function(_) {
+        return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
+      },
+
+      alphaDecay: function(_) {
+        return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
+      },
+
+      alphaTarget: function(_) {
+        return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
+      },
+
+      velocityDecay: function(_) {
+        return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
+      },
+
+      force: function(name, _) {
+        return arguments.length > 1 ? ((_ == null ? forces.delete(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
+      },
+
+      find: function(x, y, radius) {
+        var i = 0,
+            n = nodes.length,
+            dx,
+            dy,
+            d2,
+            node,
+            closest;
+
+        if (radius == null) radius = Infinity;
+        else radius *= radius;
+
+        for (i = 0; i < n; ++i) {
+          node = nodes[i];
+          dx = x - node.x;
+          dy = y - node.y;
+          d2 = dx * dx + dy * dy;
+          if (d2 < radius) closest = node, radius = d2;
+        }
+
+        return closest;
+      },
+
+      on: function(name, _) {
+        return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
+      }
+    };
+  }
+
+  function forceManyBody() {
+    var nodes,
+        node,
+        alpha,
+        strength = constant$4(-30),
+        strengths,
+        distanceMin2 = 1,
+        distanceMax2 = Infinity,
+        theta2 = 0.81;
+
+    function force(_) {
+      var i, n = nodes.length, tree = quadtree(nodes, x, y).visitAfter(accumulate);
+      for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
+    }
+
+    function initialize() {
+      if (!nodes) return;
+      var i, n = nodes.length, node;
+      strengths = new Array(n);
+      for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
+    }
+
+    function accumulate(quad) {
+      var strength = 0, q, c, weight = 0, x, y, i;
+
+      // For internal nodes, accumulate forces from child quadrants.
+      if (quad.length) {
+        for (x = y = i = 0; i < 4; ++i) {
+          if ((q = quad[i]) && (c = Math.abs(q.value))) {
+            strength += q.value, weight += c, x += c * q.x, y += c * q.y;
+          }
+        }
+        quad.x = x / weight;
+        quad.y = y / weight;
+      }
+
+      // For leaf nodes, accumulate forces from coincident quadrants.
+      else {
+        q = quad;
+        q.x = q.data.x;
+        q.y = q.data.y;
+        do strength += strengths[q.data.index];
+        while (q = q.next);
+      }
+
+      quad.value = strength;
+    }
+
+    function apply(quad, x1, _, x2) {
+      if (!quad.value) return true;
+
+      var x = quad.x - node.x,
+          y = quad.y - node.y,
+          w = x2 - x1,
+          l = x * x + y * y;
+
+      // Apply the Barnes-Hut approximation if possible.
+      // Limit forces for very close nodes; randomize direction if coincident.
+      if (w * w / theta2 < l) {
+        if (l < distanceMax2) {
+          if (x === 0) x = jiggle(), l += x * x;
+          if (y === 0) y = jiggle(), l += y * y;
+          if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+          node.vx += x * quad.value * alpha / l;
+          node.vy += y * quad.value * alpha / l;
+        }
+        return true;
+      }
+
+      // Otherwise, process points directly.
+      else if (quad.length || l >= distanceMax2) return;
+
+      // Limit forces for very close nodes; randomize direction if coincident.
+      if (quad.data !== node || quad.next) {
+        if (x === 0) x = jiggle(), l += x * x;
+        if (y === 0) y = jiggle(), l += y * y;
+        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
+      }
+
+      do if (quad.data !== node) {
+        w = strengths[quad.data.index] * alpha / l;
+        node.vx += x * w;
+        node.vy += y * w;
+      } while (quad = quad.next);
+    }
+
+    force.initialize = function(_) {
+      nodes = _;
+      initialize();
+    };
+
+    force.strength = function(_) {
+      return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : strength;
+    };
+
+    force.distanceMin = function(_) {
+      return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
+    };
+
+    force.distanceMax = function(_) {
+      return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
+    };
+
+    force.theta = function(_) {
+      return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
+    };
+
+    return force;
+  }
+
+  function forceRadial(radius, x, y) {
+    var nodes,
+        strength = constant$4(0.1),
+        strengths,
+        radiuses;
+
+    if (typeof radius !== "function") radius = constant$4(+radius);
+    if (x == null) x = 0;
+    if (y == null) y = 0;
+
+    function force(alpha) {
+      for (var i = 0, n = nodes.length; i < n; ++i) {
+        var node = nodes[i],
+            dx = node.x - x || 1e-6,
+            dy = node.y - y || 1e-6,
+            r = Math.sqrt(dx * dx + dy * dy),
+            k = (radiuses[i] - r) * strengths[i] * alpha / r;
+        node.vx += dx * k;
+        node.vy += dy * k;
+      }
+    }
+
+    function initialize() {
+      if (!nodes) return;
+      var i, n = nodes.length;
+      strengths = new Array(n);
+      radiuses = new Array(n);
+      for (i = 0; i < n; ++i) {
+        radiuses[i] = +radius(nodes[i], i, nodes);
+        strengths[i] = isNaN(radiuses[i]) ? 0 : +strength(nodes[i], i, nodes);
+      }
+    }
+
+    force.initialize = function(_) {
+      nodes = _, initialize();
+    };
+
+    force.strength = function(_) {
+      return arguments.length ? (strength = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : strength;
+    };
+
+    force.radius = function(_) {
+      return arguments.length ? (radius = typeof _ === "function" ? _ : constant$4(+_), initialize(), force) : radius;
+    };
+
+    force.x = function(_) {
+      return arguments.length ? (x = +_, force) : x;
+    };
+
+    force.y = function(_) {
+      return arguments.length ? (y = +_, force) : y;
+    };
+
+    return force;
+  }
+
+  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+  function createCommonjsModule(fn, module) {
+  	return module = { exports: {} }, fn(module, module.exports), module.exports;
+  }
+
+  var fetchJsonp = createCommonjsModule(function (module, exports) {
+  (function (global, factory) {
+    {
+      factory(exports, module);
+    }
+  })(commonjsGlobal, function (exports, module) {
+
+    var defaultOptions = {
+      timeout: 5000,
+      jsonpCallback: 'callback',
+      jsonpCallbackFunction: null
+    };
+
+    function generateCallbackFunction() {
+      return 'jsonp_' + Date.now() + '_' + Math.ceil(Math.random() * 100000);
+    }
+
+    function clearFunction(functionName) {
+      // IE8 throws an exception when you try to delete a property on window
+      // http://stackoverflow.com/a/1824228/751089
+      try {
+        delete window[functionName];
+      } catch (e) {
+        window[functionName] = undefined;
+      }
+    }
+
+    function removeScript(scriptId) {
+      var script = document.getElementById(scriptId);
+      if (script) {
+        document.getElementsByTagName('head')[0].removeChild(script);
+      }
+    }
+
+    function fetchJsonp(_url) {
+      var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
+
+      // to avoid param reassign
+      var url = _url;
+      var timeout = options.timeout || defaultOptions.timeout;
+      var jsonpCallback = options.jsonpCallback || defaultOptions.jsonpCallback;
+
+      var timeoutId = undefined;
+
+      return new Promise(function (resolve, reject) {
+        var callbackFunction = options.jsonpCallbackFunction || generateCallbackFunction();
+        var scriptId = jsonpCallback + '_' + callbackFunction;
+
+        window[callbackFunction] = function (response) {
+          resolve({
+            ok: true,
+            // keep consistent with fetch API
+            json: function json() {
+              return Promise.resolve(response);
+            }
+          });
+
+          if (timeoutId) clearTimeout(timeoutId);
+
+          removeScript(scriptId);
+
+          clearFunction(callbackFunction);
+        };
+
+        // Check if the user set their own params, and if not add a ? to start a list of params
+        url += url.indexOf('?') === -1 ? '?' : '&';
+
+        var jsonpScript = document.createElement('script');
+        jsonpScript.setAttribute('src', '' + url + jsonpCallback + '=' + callbackFunction);
+        if (options.charset) {
+          jsonpScript.setAttribute('charset', options.charset);
+        }
+        jsonpScript.id = scriptId;
+        document.getElementsByTagName('head')[0].appendChild(jsonpScript);
+
+        timeoutId = setTimeout(function () {
+          reject(new Error('JSONP request to ' + _url + ' timed out'));
+
+          clearFunction(callbackFunction);
+          removeScript(scriptId);
+          window[callbackFunction] = function () {
+            clearFunction(callbackFunction);
+          };
+        }, timeout);
+
+        // Caught if got 404/500
+        jsonpScript.onerror = function () {
+          reject(new Error('JSONP request to ' + _url + ' failed'));
+
+          clearFunction(callbackFunction);
+          removeScript(scriptId);
+          if (timeoutId) clearTimeout(timeoutId);
+        };
+      });
+    }
+
+    // export as global function
+    /*
+    let local;
+    if (typeof global !== 'undefined') {
+      local = global;
+    } else if (typeof self !== 'undefined') {
+      local = self;
+    } else {
+      try {
+        local = Function('return this')();
+      } catch (e) {
+        throw new Error('polyfill failed because global object is unavailable in this environment');
+      }
+    }
+    local.fetchJsonp = fetchJsonp;
+    */
+
+    module.exports = fetchJsonp;
+  });
+  });
+
+  var eventemitter3 = createCommonjsModule(function (module) {
+
+  var has = Object.prototype.hasOwnProperty
+    , prefix = '~';
+
+  /**
+   * Constructor to create a storage for our `EE` objects.
+   * An `Events` instance is a plain object whose properties are event names.
+   *
+   * @constructor
+   * @private
+   */
+  function Events() {}
+
+  //
+  // We try to not inherit from `Object.prototype`. In some engines creating an
+  // instance in this way is faster than calling `Object.create(null)` directly.
+  // If `Object.create(null)` is not supported we prefix the event names with a
+  // character to make sure that the built-in object properties are not
+  // overridden or used as an attack vector.
+  //
+  if (Object.create) {
+    Events.prototype = Object.create(null);
+
+    //
+    // This hack is needed because the `__proto__` property is still inherited in
+    // some old browsers like Android 4, iPhone 5.1, Opera 11 and Safari 5.
+    //
+    if (!new Events().__proto__) prefix = false;
+  }
+
+  /**
+   * Representation of a single event listener.
+   *
+   * @param {Function} fn The listener function.
+   * @param {*} context The context to invoke the listener with.
+   * @param {Boolean} [once=false] Specify if the listener is a one-time listener.
+   * @constructor
+   * @private
+   */
+  function EE(fn, context, once) {
+    this.fn = fn;
+    this.context = context;
+    this.once = once || false;
+  }
+
+  /**
+   * Add a listener for a given event.
+   *
+   * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn The listener function.
+   * @param {*} context The context to invoke the listener with.
+   * @param {Boolean} once Specify if the listener is a one-time listener.
+   * @returns {EventEmitter}
+   * @private
+   */
+  function addListener(emitter, event, fn, context, once) {
+    if (typeof fn !== 'function') {
+      throw new TypeError('The listener must be a function');
+    }
+
+    var listener = new EE(fn, context || emitter, once)
+      , evt = prefix ? prefix + event : event;
+
+    if (!emitter._events[evt]) emitter._events[evt] = listener, emitter._eventsCount++;
+    else if (!emitter._events[evt].fn) emitter._events[evt].push(listener);
+    else emitter._events[evt] = [emitter._events[evt], listener];
+
+    return emitter;
+  }
+
+  /**
+   * Clear event by name.
+   *
+   * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+   * @param {(String|Symbol)} evt The Event name.
+   * @private
+   */
+  function clearEvent(emitter, evt) {
+    if (--emitter._eventsCount === 0) emitter._events = new Events();
+    else delete emitter._events[evt];
+  }
+
+  /**
+   * Minimal `EventEmitter` interface that is molded against the Node.js
+   * `EventEmitter` interface.
+   *
+   * @constructor
+   * @public
+   */
+  function EventEmitter() {
+    this._events = new Events();
+    this._eventsCount = 0;
+  }
+
+  /**
+   * Return an array listing the events for which the emitter has registered
+   * listeners.
+   *
+   * @returns {Array}
+   * @public
+   */
+  EventEmitter.prototype.eventNames = function eventNames() {
+    var names = []
+      , events
+      , name;
+
+    if (this._eventsCount === 0) return names;
+
+    for (name in (events = this._events)) {
+      if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
+    }
+
+    if (Object.getOwnPropertySymbols) {
+      return names.concat(Object.getOwnPropertySymbols(events));
+    }
+
+    return names;
+  };
+
+  /**
+   * Return the listeners registered for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @returns {Array} The registered listeners.
+   * @public
+   */
+  EventEmitter.prototype.listeners = function listeners(event) {
+    var evt = prefix ? prefix + event : event
+      , handlers = this._events[evt];
+
+    if (!handlers) return [];
+    if (handlers.fn) return [handlers.fn];
+
+    for (var i = 0, l = handlers.length, ee = new Array(l); i < l; i++) {
+      ee[i] = handlers[i].fn;
+    }
+
+    return ee;
+  };
+
+  /**
+   * Return the number of listeners listening to a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @returns {Number} The number of listeners.
+   * @public
+   */
+  EventEmitter.prototype.listenerCount = function listenerCount(event) {
+    var evt = prefix ? prefix + event : event
+      , listeners = this._events[evt];
+
+    if (!listeners) return 0;
+    if (listeners.fn) return 1;
+    return listeners.length;
+  };
+
+  /**
+   * Calls each of the listeners registered for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @returns {Boolean} `true` if the event had listeners, else `false`.
+   * @public
+   */
+  EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
+    var evt = prefix ? prefix + event : event;
+
+    if (!this._events[evt]) return false;
+
+    var listeners = this._events[evt]
+      , len = arguments.length
+      , args
+      , i;
+
+    if (listeners.fn) {
+      if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);
+
+      switch (len) {
+        case 1: return listeners.fn.call(listeners.context), true;
+        case 2: return listeners.fn.call(listeners.context, a1), true;
+        case 3: return listeners.fn.call(listeners.context, a1, a2), true;
+        case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
+        case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
+        case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
+      }
+
+      for (i = 1, args = new Array(len -1); i < len; i++) {
+        args[i - 1] = arguments[i];
+      }
+
+      listeners.fn.apply(listeners.context, args);
+    } else {
+      var length = listeners.length
+        , j;
+
+      for (i = 0; i < length; i++) {
+        if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);
+
+        switch (len) {
+          case 1: listeners[i].fn.call(listeners[i].context); break;
+          case 2: listeners[i].fn.call(listeners[i].context, a1); break;
+          case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
+          case 4: listeners[i].fn.call(listeners[i].context, a1, a2, a3); break;
+          default:
+            if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
+              args[j - 1] = arguments[j];
+            }
+
+            listeners[i].fn.apply(listeners[i].context, args);
+        }
+      }
+    }
+
+    return true;
+  };
+
+  /**
+   * Add a listener for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn The listener function.
+   * @param {*} [context=this] The context to invoke the listener with.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.on = function on(event, fn, context) {
+    return addListener(this, event, fn, context, false);
+  };
+
+  /**
+   * Add a one-time listener for a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn The listener function.
+   * @param {*} [context=this] The context to invoke the listener with.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.once = function once(event, fn, context) {
+    return addListener(this, event, fn, context, true);
+  };
+
+  /**
+   * Remove the listeners of a given event.
+   *
+   * @param {(String|Symbol)} event The event name.
+   * @param {Function} fn Only remove the listeners that match this function.
+   * @param {*} context Only remove the listeners that have this context.
+   * @param {Boolean} once Only remove one-time listeners.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
+    var evt = prefix ? prefix + event : event;
+
+    if (!this._events[evt]) return this;
+    if (!fn) {
+      clearEvent(this, evt);
+      return this;
+    }
+
+    var listeners = this._events[evt];
+
+    if (listeners.fn) {
+      if (
+        listeners.fn === fn &&
+        (!once || listeners.once) &&
+        (!context || listeners.context === context)
+      ) {
+        clearEvent(this, evt);
+      }
+    } else {
+      for (var i = 0, events = [], length = listeners.length; i < length; i++) {
+        if (
+          listeners[i].fn !== fn ||
+          (once && !listeners[i].once) ||
+          (context && listeners[i].context !== context)
+        ) {
+          events.push(listeners[i]);
+        }
+      }
+
+      //
+      // Reset the array, or remove it completely if we have no more listeners.
+      //
+      if (events.length) this._events[evt] = events.length === 1 ? events[0] : events;
+      else clearEvent(this, evt);
+    }
+
+    return this;
+  };
+
+  /**
+   * Remove all listeners, or those of the specified event.
+   *
+   * @param {(String|Symbol)} [event] The event name.
+   * @returns {EventEmitter} `this`.
+   * @public
+   */
+  EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
+    var evt;
+
+    if (event) {
+      evt = prefix ? prefix + event : event;
+      if (this._events[evt]) clearEvent(this, evt);
+    } else {
+      this._events = new Events();
+      this._eventsCount = 0;
+    }
+
+    return this;
+  };
+
+  //
+  // Alias methods names because people roll like that.
+  //
+  EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+  EventEmitter.prototype.addListener = EventEmitter.prototype.on;
+
+  //
+  // Expose the prefix.
+  //
+  EventEmitter.prefixed = prefix;
+
+  //
+  // Allow `EventEmitter` to be imported as module namespace.
+  //
+  EventEmitter.EventEmitter = EventEmitter;
+
+  //
+  // Expose the module.
+  //
+  {
+    module.exports = EventEmitter;
+  }
+  });
+
+  var EOL = {},
+      EOF = {},
+      QUOTE = 34,
+      NEWLINE = 10,
+      RETURN = 13;
+
+  function objectConverter(columns) {
+    return new Function("d", "return {" + columns.map(function(name, i) {
+      return JSON.stringify(name) + ": d[" + i + "]";
+    }).join(",") + "}");
+  }
+
+  function customConverter(columns, f) {
+    var object = objectConverter(columns);
+    return function(row, i) {
+      return f(object(row), i, columns);
+    };
+  }
+
+  // Compute unique columns in order of discovery.
+  function inferColumns(rows) {
+    var columnSet = Object.create(null),
+        columns = [];
+
+    rows.forEach(function(row) {
+      for (var column in row) {
+        if (!(column in columnSet)) {
+          columns.push(columnSet[column] = column);
+        }
+      }
+    });
+
+    return columns;
+  }
+
+  function pad(value, width) {
+    var s = value + "", length = s.length;
+    return length < width ? new Array(width - length + 1).join(0) + s : s;
+  }
+
+  function formatYear(year) {
+    return year < 0 ? "-" + pad(-year, 6)
+      : year > 9999 ? "+" + pad(year, 6)
+      : pad(year, 4);
+  }
+
+  function formatDate(date) {
+    var hours = date.getUTCHours(),
+        minutes = date.getUTCMinutes(),
+        seconds = date.getUTCSeconds(),
+        milliseconds = date.getUTCMilliseconds();
+    return isNaN(date) ? "Invalid Date"
+        : formatYear(date.getUTCFullYear(), 4) + "-" + pad(date.getUTCMonth() + 1, 2) + "-" + pad(date.getUTCDate(), 2)
+        + (milliseconds ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + ":" + pad(seconds, 2) + "." + pad(milliseconds, 3) + "Z"
+        : seconds ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + ":" + pad(seconds, 2) + "Z"
+        : minutes || hours ? "T" + pad(hours, 2) + ":" + pad(minutes, 2) + "Z"
+        : "");
+  }
+
+  function dsvFormat(delimiter) {
+    var reFormat = new RegExp("[\"" + delimiter + "\n\r]"),
+        DELIMITER = delimiter.charCodeAt(0);
+
+    function parse(text, f) {
+      var convert, columns, rows = parseRows(text, function(row, i) {
+        if (convert) return convert(row, i - 1);
+        columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
+      });
+      rows.columns = columns || [];
+      return rows;
+    }
+
+    function parseRows(text, f) {
+      var rows = [], // output rows
+          N = text.length,
+          I = 0, // current character index
+          n = 0, // current line number
+          t, // current token
+          eof = N <= 0, // current token followed by EOF?
+          eol = false; // current token followed by EOL?
+
+      // Strip the trailing newline.
+      if (text.charCodeAt(N - 1) === NEWLINE) --N;
+      if (text.charCodeAt(N - 1) === RETURN) --N;
+
+      function token() {
+        if (eof) return EOF;
+        if (eol) return eol = false, EOL;
+
+        // Unescape quotes.
+        var i, j = I, c;
+        if (text.charCodeAt(j) === QUOTE) {
+          while (I++ < N && text.charCodeAt(I) !== QUOTE || text.charCodeAt(++I) === QUOTE);
+          if ((i = I) >= N) eof = true;
+          else if ((c = text.charCodeAt(I++)) === NEWLINE) eol = true;
+          else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
+          return text.slice(j + 1, i - 1).replace(/""/g, "\"");
+        }
+
+        // Find next delimiter or newline.
+        while (I < N) {
+          if ((c = text.charCodeAt(i = I++)) === NEWLINE) eol = true;
+          else if (c === RETURN) { eol = true; if (text.charCodeAt(I) === NEWLINE) ++I; }
+          else if (c !== DELIMITER) continue;
+          return text.slice(j, i);
+        }
+
+        // Return last token before EOF.
+        return eof = true, text.slice(j, N);
+      }
+
+      while ((t = token()) !== EOF) {
+        var row = [];
+        while (t !== EOL && t !== EOF) row.push(t), t = token();
+        if (f && (row = f(row, n++)) == null) continue;
+        rows.push(row);
+      }
+
+      return rows;
+    }
+
+    function preformatBody(rows, columns) {
+      return rows.map(function(row) {
+        return columns.map(function(column) {
+          return formatValue(row[column]);
+        }).join(delimiter);
+      });
+    }
+
+    function format(rows, columns) {
+      if (columns == null) columns = inferColumns(rows);
+      return [columns.map(formatValue).join(delimiter)].concat(preformatBody(rows, columns)).join("\n");
+    }
+
+    function formatBody(rows, columns) {
+      if (columns == null) columns = inferColumns(rows);
+      return preformatBody(rows, columns).join("\n");
+    }
+
+    function formatRows(rows) {
+      return rows.map(formatRow).join("\n");
+    }
+
+    function formatRow(row) {
+      return row.map(formatValue).join(delimiter);
+    }
+
+    function formatValue(value) {
+      return value == null ? ""
+          : value instanceof Date ? formatDate(value)
+          : reFormat.test(value += "") ? "\"" + value.replace(/"/g, "\"\"") + "\""
+          : value;
+    }
+
+    return {
+      parse: parse,
+      parseRows: parseRows,
+      format: format,
+      formatBody: formatBody,
+      formatRows: formatRows
+    };
+  }
+
+  var csv = dsvFormat(",");
+
+  var tsv = dsvFormat("\t");
+
+  function responseJson(response) {
+    if (!response.ok) throw new Error(response.status + " " + response.statusText);
+    return response.json();
+  }
+
+  function json(input, init) {
+    return fetch(input, init).then(responseJson);
+  }
+
+  // import { json } from 'd3-fetch';
+
+  class ForceNet {
+
+      constructor (symbols) {
+          var width = 600,
+              height = 600;
+
+          this.symbols = symbols || {};
+          this.events = new eventemitter3();
+          this.active_page = null;
+          // this.nodes = {};
+          this.simulation = forceSimulation()
+              .velocityDecay(0.1)
+              .force("link", forceLink().id(d => d.title))
+              .force("charge", forceManyBody())
+              .force("radial", forceRadial(180, width/2, height/2));
+              // .force("center", forceCenter(width / 2, height / 2));
+          this.svg = null;
+          // this.historylinks = {};
+      }
+
+      on (message, callback, context) {
+          this.events.on(message, callback, context);
+      }
+
+      init_svg (svg) {
+          this.svg = select(svg || "svg");
+          this.zoom = zoom()
+              .scaleExtent([1 / 16, 4])
+              .on("zoom", () => {
+                this.content.attr("transform", event.transform);
+                // console.log("transform", event.transform, this.content.attr("transform"));
+              });
+          this.rect = this.svg.append("rect")
+              .attr("width", 1000)
+              .attr("height", 1000)
+              .style("fill", "none")
+              .style("pointer-events", "all")
+              .call(this.zoom);
+          this.content = this.svg.append("g")
+              .attr("id", "content"),
+          this.linksg = this.content.append("g")
+              .attr("class", "links");
+          this.nodesg = this.content.append("g")
+              .attr("class", "nodes");
+      }
+
+      dragstarted (d) {
+          if (!event.active) this.simulation.alphaTarget(0.3).restart();
+          d.fx = d.x;
+          d.fy = d.y;
+      }
+
+      dragged (d) {
+          d.fx = event.x;
+          d.fy = event.y;
+      }
+
+      dragended(d) {
+          if (!event.active) this.simulation.alphaTarget(0);
+          d.fx = null;
+          d.fy = null;
+      }
+
+      link_key (a, b) {
+          return (a < b) ? ("link_"+a+"_"+b) : ("link_"+b+"_"+a);
+      }
+
+      get_symbol (d, def) {
+          for (var i=0, l=d.cats.length; i<l; i++) {
+              if (this.symbols[d.cats[i]]) {
+                  return this.symbols[d.cats[i]];
+              }
+          }
+          return this.symbols.default || def;
+      }
+
+      update_graph (graph) {
+          console.log("UPDATE GRAPH", graph.nodes.length, graph.links.length);
+          var link = this.linksg.selectAll("line")
+                  .data(graph.links, d => { return this.link_key(d.source.title, d.target.title) });
+          var link_enter = link.enter()
+              .append("line");
+
+          link.exit().each(d => {
+              d.source.linked = false;
+              d.target.linked = false;
+          }).remove();
+          
+          link_enter.merge(link).each(d => {
+                  d.source.linked = true;
+                  d.target.linked = true;
+              });
+
+          var node = this.nodesg
+              .selectAll("g.page")
+              .data(graph.nodes, function (d) { return d.title });
+
+          var that = this;
+          var node_enter = node.enter().append("g")
+              .attr("class", "page")
+              // .attr("class", d=>"page "+this.wiki.get_ns_classname(d.ns))
+              .on("click", function(d) {
+                  that.events.emit("nodeclick", d, this);
+                  // this.set_active_node(d.title);
+              })
+              .on("mouseover", function (d) {
+                  // console.log("mouseover", this);
+                  select(this).classed("mouse", true);
+              })
+              .on("mouseout", function (d) {
+                  // console.log("mouseout", this);
+                  select(this).classed("mouse", false);
+              })
+              .call(drag()
+                  .on("start", this.dragstarted.bind(this))
+                  .on("drag", this.dragged.bind(this))
+                  .on("end", this.dragended.bind(this)));
+
+          node_enter.append("use")
+              .attr("xlink:href", d => this.get_symbol(d, "default"))
+              .attr("class", "testcolor");
+              // {
+              //     for (var i=0, l=d.cats.length; i<l; i++) {
+              //         if (this.symbols[d.cats[i]]) {
+              //             return this.symbols[d.cats[i]];
+              //         }
+              //     }
+              //     return this.symbols.default || "default";
+              // });
+
+          // node_enter.append("circle")
+          //     .attr("r", 6);
+
+          node_enter.append("text")
+              .text(d => d.title)
+              .attr("x", 10);
+
+          //node_enter.append("title")
+          //   .text(function(d) { return d.title; });
+
+          node = node_enter.merge(node);
+          link = link_enter.merge(link);
+
+          node.classed("active", d=>d.active);
+
+          this.simulation
+              .nodes(graph.nodes)
+              .on("tick", ticked);
+
+          this.simulation.force("link")
+              .links(graph.links);
+
+          this.simulation.force("radial").radius(d => d.linked ? null : 200);
+
+          function ticked() {
+              link
+                  .attr("x1", function(d) { return d.source.x; })
+                  .attr("y1", function(d) { return d.source.y; })
+                  .attr("x2", function(d) { return d.target.x; })
+                  .attr("y2", function(d) { return d.target.y; });
+
+              // node
+              //     .attr("cx", function(d) { return d.x; })
+              //     .attr("cy", function(d) { return d.y; });
+              node
+                  .attr("transform", d => `translate(${d.x},${d.y})`);
+          }
+          this.update_nodes();
+          this.update_forces();
+          // this.simulation.alphaTarget(0.3).restart();
+      }
+
+      update_nodes () {
+          var nodes = this.nodesg.selectAll("g.page");
+          console.log("update_nodes", nodes.size());
+          nodes.classed("active", d=>d.active);
+          nodes.classed("active2", d=>d.active2);
+          nodes.classed("highlight", d=>d.highlight);
+          nodes.sort((a, b) => {
+              // console.log("sort", a, b);
+              var x = a.active ? 10 : (a.active2 ? 5 : 0),
+                  y = b.active ? 10 : (b.active2 ? 5 : 0);
+              return x - y; 
+          });
+          var links = this.linksg.selectAll("line");
+          links.classed("active2", d=>d.active2);        
+          links.classed("history", d=>d.type == "history");        
+          links.sort((a, b) => {
+              // console.log("sort", a, b);
+              var x = a.active2 ? 10 : (a.history ? 5 : 0),
+                  y = b.active2 ? 10 : (b.history ? 5 : 0);
+              return x - y; 
+          });
+      }
+
+      update_forces () {
+          var force = this.simulation.force("link");
+          console.log("update_forces:force", force);
+          this.simulation.force("link").strength(d => {
+              if (d.source.active || d.target.active) {
+                  return 1;
+              } else {
+                  // same as d3.force's defaultStrength
+                  return 0.5 * (1 / Math.min(d.source.count, d.target.count)); 
+              }
+          });
+          this.simulation.alphaTarget(0.3).restart();
+      }
+
+
+  }
+
+  class SimpleMap {
+
+      constructor (symbols) {
+
+          this.events = new eventemitter3();
+          this.active_page = null;
+          // this.nodes = {};
+          this.symbols = symbols;
+          this.net = new ForceNet(symbols);
+          this.net.on("nodeclick", this.nodeclick.bind(this));
+          // this.simulation = forceSimulation()
+          //     .velocityDecay(0.1)
+          //     .force("link", forceLink().id(d => d.title))
+          //     .force("charge", forceManyBody())
+          //     .force("radial", forceRadial(180, width/2, height/2));
+          //     // .force("center", forceCenter(width / 2, height / 2));
+          this.svg = null;
+          this.historylinks = {};
+          this.links = null;
+          this.highlight_category = null;
+          this.show_history = false;
+      }
+
+      nodeclick (d, elt) {
+          console.log("nodeclick", d, elt, this);
+          this.set_active_node(d, elt);
+      }
+
+      init_svg (svg) {
+          this.net.init_svg(svg);
+      }
+
+      async load_json (source) {
+          var data = await json(source);
+
+          // index the nodes by title, init link-arity count
+          var index = {};
+          this.nodes_by_title = index;
+          for (let i=0, l=data.nodes.length; i<l; i++) {
+              let node = data.nodes[i];
+              node.count = 0;
+              index[node.title] = node;
+          }
+          this.nodes = data.nodes;
+
+          var use_links = [];
+          data.links = data.links.forEach(x => {
+              var source = index[x.source],
+                  target = index[x.target];
+              if (source === undefined) {
+                  console.log("bad source", x.source);
+                  return;
+              }
+              if (target === undefined) {
+                  console.log("bad target", x.target);
+                  return;
+              }
+              source.count += 1;
+              target.count += 1;
+              use_links.push({ source: source, target: target });
+          });
+          data.links = use_links;
+          this.links = data.links;
+          // console.log("data", data);
+          // calculate the node sizes (link arity)
+          this.net.update_graph(data);
+      }
+
+      get_symbol_image_path (cname) {
+          var symbol = this.symbols[cname];
+          if (symbol) {
+              let hpos = symbol.indexOf("#"),
+                  rest = symbol.substr(hpos+1);
+              rest = rest.replace(/'/g, '');
+              return "img/"+rest+".png";
+          }
+      }
+      async load_cats (src, elt) {
+          var data = await json(src);
+          
+          console.log("indexing categories by title");
+          var cats_by_title = {};
+          for (let i=0, l=data.length; i<l; i++) {
+              let cat = data[i];
+              cats_by_title[cat.title] = cat;
+              cat.pages = [];
+              cat.tcount = 0;
+          }
+          // index categories
+          console.log("indexing categories");
+          for (let key in this.nodes_by_title) {
+              let node = this.nodes_by_title[key];
+              // console.log("key", key, node.cats);
+              for (let j=0, jl=node.cats.length; j<jl; j++) {
+                  let cname = node.cats[j],
+                      cat = cats_by_title[cname];
+                  if (cat) {
+                      // increment the category + parents
+                      cat.pages.push(node);
+                      cat.tcount += 1;
+                      while (cat.parent) {
+                          cat = cats_by_title[cat.parent];
+                          cat.tcount += 1;
+                      }
+                  } else {
+                      console.log("Warning, unknown category", cname);
+                  }
+              }
+          }
+          console.log("pre filter", data.length);
+          data = data.filter(d => d.tcount > 0);
+          console.log("post filter", data.length);
+          console.log("load_cats.data", data, elt);
+          var cat = select(elt)
+              .selectAll("div.cat")
+              .data(data)
+              .enter()
+              .append("div")
+              .attr("class", "cat");
+          cat.classed("icon", d => this.get_symbol_image_path(d.title));
+          cat.append("span").attr("class", "icon").filter(d=> this.get_symbol_image_path(d.title)).style("background-image", d => "url("+this.get_symbol_image_path(d.title)+")");
+          cat.append("span").attr("class", "spacing").html(d => {
+              var d = d.depth,
+                  ret = "";
+              while(d) {
+                  ret += "&nbsp;&nbsp;&nbsp;&nbsp;";
+                  d-=1;
+              }
+              return ret;
+          });
+          cat.append("a").attr("class", "label").html(d => d.title).attr("href", "#").on("click", d => {
+              event.preventDefault();
+              this.category_click(d);
+          });
+          cat.append("span").attr("class", "count").html(d => d.tcount);
+      }
+
+      category_click (d) {
+          console.log("category click", d);
+          if (this.highlight_category) {
+              // cleanup old pages
+              this.highlight_category.pages.forEach(d => d.highlight = false);
+          }
+          this.highlight_category = d;
+          this.highlight_category.pages.forEach(d => d.highlight = true);
+          this.net.update_nodes();
+          // set highlight category...
+          // all nodes with this category get .highlight = true
+          // make a category index ?!
+      }
+
+      on (message, callback, context) {
+          this.events.on(message, callback, context);
+      }
+
+  /* OLD STYLE with node.all_links
+      walk (node, links) {
+          var links_seen = {};
+          // var node = this.ensure_node(nodename);
+          node.all_links.forEach(x => {
+              var link_key = this.link_key(node.title, x.title);
+              if (!links_seen[link_key]) {
+                  links.push({source: node, target: x});
+                  links_seen[link_key] = true;
+              }
+          })
+          return;
+      }
+  */
+      set_active_title (title) {
+          this.set_active_node(title);
+      }
+
+      activate_linked_nodes (page, active) {
+          // deactivate linked links/nodes
+          for (let i=0, l=this.links.length; i<l; i++) {
+              let link = this.links[i];
+              if (link.source == page || link.target == page) {
+                  link.active2 = active;
+                  link.source.active2 = active;
+                  link.target.active2 = active;
+              }
+          }        
+      }
+
+      async set_active_node (page) {
+          if (typeof(page) === "string") {
+               let pagename = page;
+               page = this.nodes_by_title[page];
+
+               if (!page) {
+                  console.log("wikimap.set_active_node: page not found", pagename);
+               }
+          }
+
+          if (page === this.active_page) {
+              // console.log("page is already the active page", page, this.active_page);
+              return;
+          }
+          if (this.active_page) {
+              this.active_page.active = false;
+              // deactivate linked links/nodes
+              this.activate_linked_nodes(this.active_page, false);
+              // ENSURE HISTORY LINK TO PREVIOUS NODE AND CURRENT
+              var lkey = this.net.link_key(this.active_page.title, page.title),
+                   source = (this.active_page.title < page.title) ? this.active_page : page,
+                   target = (this.active_page.title < page.title) ? page : this.active_page;
+              this.historylinks[lkey] = {source: source, target: target, type:"history"};
+          }
+          
+          this.active_page = page;
+          this.active_page.active = true;
+          this.activate_linked_nodes(this.active_page, true);
+
+          this.events.emit("page", this.active_page.title);
+
+          this.net.update_nodes();
+          this.net.update_forces();
+      }
+
+      set_show_history (value) {
+          console.log("wikimapsimple.show_history", value);
+          if (this.show_history !== value) {
+              this.show_history = value;
+              if (this.show_history) {
+                  let graph = {};
+                  graph.nodes = this.nodes;
+                  graph.links = this.links.slice();
+                  for (var key in this.historylinks) {
+                      graph.links.push(this.historylinks[key]);
+                  }
+                  this.net.update_graph(graph);
+              } else {
+                  let graph = {};
+                  graph.nodes = this.nodes;
+                  graph.links = this.links;
+                  this.net.update_graph(graph);
+              }
+          }
+      }
+  /*
+      async load (page) {
+          console.log("loading", page.title);
+          var links = await page.get_links(),
+              backlinks = await page.get_linkshere(),
+              alllinks = this.wiki.union(links, backlinks);
+
+          page.all_links = alllinks;
+          // console.log("alllinks", alllinks);
+          var graph = {};
+
+          graph.nodes = values(this.wiki.pages_by_title);
+          graph.links = [];
+          this.walk(page, graph.links);
+          // activate historylinks
+          values(this.historylinks).forEach(x => {
+              graph.links.push(x);
+          })
+          // graph.links = titles.map(t => ({source: pagetitle, target: t}));
+          this.update_graph(graph);
+          // console.log("GOT DATA", titles);
+          // return titles;
+      }
+  */
+  }
+
+
+
+  // http://erg.activearchives.org/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+  // http://erg.activearchives.org/w/api.php?action=query&prop=info&titles=Main%20Page
+  // Bienvenue_à_l’erg
+  // http://erg.activearchives.org/mw/index.php/Bienvenue_%C3%A0_l%E2%80%99erg
+
+  exports.SimpleMap = SimpleMap;
+
+  return exports;
+
+}({}));
diff --git a/img/Ateliers_pluridisciplinaires.png b/img/Ateliers_pluridisciplinaires.png
new file mode 100644
index 0000000..7af95f0
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diff --git a/img/Cours_de_soutien_a_lorientation.png b/img/Cours_de_soutien_a_lorientation.png
new file mode 100644
index 0000000..f648128
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diff --git a/img/Cours_de_soutien_specifique.png b/img/Cours_de_soutien_specifique.png
new file mode 100644
index 0000000..7a245ef
Binary files /dev/null and b/img/Cours_de_soutien_specifique.png differ
diff --git a/img/Cours_techniques.png b/img/Cours_techniques.png
new file mode 100644
index 0000000..faec804
Binary files /dev/null and b/img/Cours_techniques.png differ
diff --git a/img/Cours_theoriques.png b/img/Cours_theoriques.png
new file mode 100644
index 0000000..b99f05a
Binary files /dev/null and b/img/Cours_theoriques.png differ
diff --git a/img/Enseignants.png b/img/Enseignants.png
new file mode 100644
index 0000000..db5458d
Binary files /dev/null and b/img/Enseignants.png differ
diff --git a/img/Main.png b/img/Main.png
new file mode 100644
index 0000000..6e68397
Binary files /dev/null and b/img/Main.png differ
diff --git a/img/Orientations.png b/img/Orientations.png
new file mode 100644
index 0000000..b3a65e4
Binary files /dev/null and b/img/Orientations.png differ
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..1bda99b
--- /dev/null
+++ b/index.html
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title></title>
+    <meta charset="utf-8">
+    <link rel="stylesheet" type="text/css" href="style.css">
+</head>
+<body>
+    <div id="controls">
+        <a href="http://localhost/mw/api.php" id="mediawikiapi"></a><input id="startpage" value="Bienvenue à l’erg" autofocus /><button id="button">ok</button>
+    </div>
+    <div id="content">
+        <svg id="svg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg>
+    </div>
+    <div id="wiki">
+        <iframe src="http://localhost/mw/"></iframe>
+    </div>
+</body>
+<script type="text/javascript" src="dist/wikimap.js"></script>
+<script>
+    var mediawikiapi = document.querySelector("#mediawikiapi").href,
+        startpage = document.querySelector("#startpage"),
+        button = document.querySelector("#button"),
+        svg = document.querySelector("#svg"),
+        iframe = document.querySelector("iframe");
+
+    window.addEventListener("resize", resize);
+    function resize() {
+        var w = window,
+        d = document,
+        e = d.documentElement,
+        g = d.getElementsByTagName('body')[0],
+        x = w.innerWidth || e.clientWidth || g.clientWidth,
+        y = w.innerHeight|| e.clientHeight|| g.clientHeight;
+        svg.setAttribute("width", x);
+        svg.setAttribute("height", y);
+        console.log("resize", x, y);
+    }
+    resize();
+    // console.log("mediawikiapi", mediawikiapi);
+    var map = new wikimap.Map(mediawikiapi);
+    map.init_svg("#svg");
+    map.on("page", function (title) {
+        console.log("map.page", title);
+        var url = wiki_title_to_url(title);
+        iframe.src = url;
+    })
+    async function doload() {
+        map.set_active_node(startpage.value);
+    }
+    var URLPAT = new RegExp("http://localhost/mw/index.php/(.+)");
+    function strip_fragment (href) {
+        var spos = href.indexOf("#");
+        if (spos >= 0) {
+            return href.substr(0, href.indexOf("#"))
+        }
+        return href;
+    }
+    function url_to_wiki_title (href) {
+        href = strip_fragment(href);
+        var m = URLPAT.exec(href);
+        if (m !== null) {
+            return decodeURI(m[1]).replace(/_/g, " ");
+        }
+        console.log("m", m);
+    }
+    function wiki_title_to_url (title) {
+        return "http://localhost/mw/index.php/"+encodeURI(title.replace(/ /g, "_"));
+    }
+    // window.addEventListener("DOMContentLoaded", doload);
+    button.addEventListener("click", doload);
+    iframe.addEventListener("load", function () {
+        var href = strip_fragment(iframe.contentWindow.location.href);
+        console.log("iframe loaded", href);
+        var title = url_to_wiki_title(href);
+        console.log("title", title);
+        if (title) {
+            map.set_active_title(title);
+        }
+        // attempt to map url to wiki page title and update the map if it is one
+
+    })
+</script>
+</html>
\ No newline at end of file
diff --git a/map.html b/map.html
new file mode 100644
index 0000000..9f20fb8
--- /dev/null
+++ b/map.html
@@ -0,0 +1,153 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title></title>
+    <meta charset="utf-8">
+    <link rel="stylesheet" type="text/css" href="style.css">
+    <style>
+        #wiki {
+            left: 80%;
+        }
+
+    </style>
+</head>
+<body>
+    <div id="controls">
+        <a href="http://localhost/mw/api.php" id="mediawikiapi"></a><input id="startpage" value="Bienvenue à l’erg" autofocus /><button id="button">ok</button>
+    </div>
+    <div id="content">
+        <svg id="svg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg>
+    </div>
+    <div id="wiki">
+        <iframe src="http://localhost/mw/"></iframe>
+    </div>
+    <div id="cats" class="expanded">
+        <div class="ocontents">
+        <div class="contents">
+            <div class="head">Liste des catégories</div>
+            <div class="body"></div>
+            <div class="foot"><input id="allcats" type="checkbox"><label for="allcats">Afficher tous</label></div>
+            <hr>
+            <div class="history"><input id="history" type="checkbox"><label for="history">Histoire</div>
+        </div>
+        </div>
+        <div class="botright"><div class="thumb"></div></div>
+    </div>
+</body>
+<script type="text/javascript" src="dist/wikimaptotal.js"></script>
+<script>
+    var mediawikiapi = document.querySelector("#mediawikiapi").href,
+        startpage = document.querySelector("#startpage"),
+        button = document.querySelector("#button"),
+        svg = document.querySelector("#svg"),
+        iframe = document.querySelector("iframe"),
+        cats = document.querySelector("#cats"),
+        cats_contents = document.querySelector("#cats .body"),
+        cats_thumb = document.querySelector("#cats .thumb"),
+        allcatscb = document.querySelector("input#allcats"),
+        historycb = document.querySelector("input#history"),
+        current_title = null,
+        loaded = false;
+
+    window.addEventListener("resize", resize);
+    function resize() {
+        var w = window,
+        d = document,
+        e = d.documentElement,
+        g = d.getElementsByTagName('body')[0],
+        x = w.innerWidth || e.clientWidth || g.clientWidth,
+        y = w.innerHeight|| e.clientHeight|| g.clientHeight;
+        svg.setAttribute("width", x);
+        svg.setAttribute("height", y);
+        console.log("resize", x, y);
+    }
+    resize();
+    // console.log("mediawikiapi", mediawikiapi);
+    var symbols = {
+        "Orientations": "symbols.svg#Orientations",
+        "Ateliers pluridisciplinaires": "symbols.svg#Ateliers_pluridisciplinaires",
+        "Cours de soutien à l'orientation": "symbols.svg#Cours_de_soutien_a_l'orientation",
+        "Cours de soutien spécifique": "symbols.svg#Cours_de_soutien_specifique",
+        "Cours techniques": "symbols.svg#Cours_techniques",
+        "Cours théoriques": "symbols.svg#Cours_theoriques",
+        "Enseignants": "symbols.svg#Enseignants",
+        "default": "symbols.svg#Main"
+    };
+    var map = new wikimap.SimpleMap(symbols);
+    map.init_svg("#svg");
+    async function doload () {
+        console.log("loading map");
+        await map.load_json("sitemap.json");
+        console.log("loading categories");
+        await map.load_cats("cats.json", cats_contents);
+        console.log("LOADED!");
+        loaded = true;
+        if (current_title) {
+            map.set_active_title(current_title);
+        }
+    }
+
+    map.on("page", function (title) {
+        console.log("map.page", title);
+        var url = wiki_title_to_url(title);
+        iframe.src = url;
+    })
+    // async function doload() {
+    //     map.set_active_node(startpage.value);
+    // }
+    var URLPAT = new RegExp("http://localhost/mw/index.php/(.+)");
+    function strip_fragment (href) {
+        var spos = href.indexOf("#");
+        if (spos >= 0) {
+            return href.substr(0, href.indexOf("#"))
+        }
+        return href;
+    }
+    function url_to_wiki_title (href) {
+        href = strip_fragment(href);
+        var m = URLPAT.exec(href);
+        if (m !== null) {
+            return decodeURI(m[1]).replace(/_/g, " ");
+        }
+        console.log("m", m);
+    }
+    function wiki_title_to_url (title) {
+        return "http://localhost/mw/index.php/"+encodeURI(title.replace(/ /g, "_"));
+    }
+    window.addEventListener("DOMContentLoaded", doload);
+    iframe.addEventListener("load", function () {
+        var href = strip_fragment(iframe.contentWindow.location.href);
+        console.log("iframe loaded", href);
+        var title = url_to_wiki_title(href);
+        console.log("title", title);
+        if (title) {
+            current_title = title;
+            if (loaded) {
+                map.set_active_title(title);
+            }
+        }
+        // attempt to map url to wiki page title and update the map if it is one
+
+    });
+
+    cats_thumb.addEventListener("click", function () {
+        cats.classList.toggle("expanded");
+    });
+    // allcats checkbox
+    // match current state & respond to change events
+    // console.log("setting checked to", cats.classList.contains("showall"))
+    allcatscb.checked = cats.classList.contains("showall");
+    allcatscb.addEventListener("change", function () {
+        // console.log("allcats", allcatscb);
+        if (allcatscb.checked) {
+            cats.classList.add("showall")
+        } else {
+            cats.classList.remove("showall")            
+        }
+    })
+    historycb.addEventListener("change", function () {
+        // console.log("history", historycb.checked);
+        map.set_show_history(historycb.checked);
+    })
+</script>
+</html>
\ No newline at end of file
diff --git a/rollup.config.js b/rollup.config.js
new file mode 100644
index 0000000..71ac795
--- /dev/null
+++ b/rollup.config.js
@@ -0,0 +1,29 @@
+// rollup.config.js
+// https://github.com/rollup/rollup-plugin-commonjs
+import commonjs from 'rollup-plugin-commonjs';
+import resolve from 'rollup-plugin-node-resolve';
+
+export default [{
+  input: 'src/wikimap.js',
+  output: {
+    file: 'dist/wikimap.js',
+    format: 'iife',
+    name: 'wikimap'
+  },
+  plugins: [
+    resolve(), 
+    commonjs()
+  ]
+},{
+  input: 'src/wikimaptotal.js',
+  output: {
+    file: 'dist/wikimaptotal.js',
+    format: 'iife',
+    name: 'wikimap'
+  },
+  plugins: [
+    resolve(), 
+    commonjs()
+  ]
+}
+];
\ No newline at end of file
diff --git a/scripts/build_html_with_svg.py b/scripts/build_html_with_svg.py
new file mode 100644
index 0000000..3e9effc
--- /dev/null
+++ b/scripts/build_html_with_svg.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+from __future__ import print_function
+import argparse, sys, json, time, os
+from jinja2 import Template, DictLoader, Environment, FileSystemLoader
+
+ap = argparse.ArgumentParser("template + svg = interface")
+ap.add_argument("template")
+ap.add_argument("svg")
+ap.add_argument("--output", type=argparse.FileType('w'), default=sys.stdout)
+args = ap.parse_args()
+
+tpath, tname = os.path.split(args.template)
+env = Environment(loader=FileSystemLoader(tpath))
+import jinjafilters
+for name, fn in jinjafilters.all.items():
+    env.filters[name] = fn
+
+from xml.etree import ElementTree as ET  
+
+ET.register_namespace("","http://www.w3.org/2000/svg")
+ET.register_namespace("xlink","http://www.w3.org/1999/xlink")
+with open(args.svg) as f:
+    svgt = ET.parse(f)
+    # print ("svgt", svgt)
+    svg_root = svgt.getroot()
+    svg_root.attrib['xmlns:xlink'] = 'http://www.w3.org/1999/xlink'
+    del svg_root.attrib['viewBox']
+    svg = ET.tostring(svgt.getroot(), method="xml")
+
+tvars = {'svg': svg}
+template = env.get_template(tname)
+print (template.render(**tvars).encode("utf-8"), file=args.output)
diff --git a/scripts/buildsitemap.py b/scripts/buildsitemap.py
new file mode 100644
index 0000000..0b3c4d9
--- /dev/null
+++ b/scripts/buildsitemap.py
@@ -0,0 +1,105 @@
+from mwclient import Site, APIError
+from mwclient.page import Page
+import argparse, json, sys
+
+ap = argparse.ArgumentParser("")
+ap.add_argument("--wikiprotocol", default="http")
+ap.add_argument("--wikihost", default="localhost")
+ap.add_argument("--wikipath", default="/mw/")
+ap.add_argument("--limit", default=None)
+ap.add_argument("--output", default=sys.stdout, type=argparse.FileType('w'))
+# ap.add_argument("--user", default=None)
+# ap.add_argument("--password", default=None)
+args = ap.parse_args()
+
+site = Site((args.wikiprotocol, args.wikihost), path=args.wikipath)
+ 
+
+def category_subcats (site, cattitle, objects=True):
+    cmcontinue = None
+    ret = []
+    while True:
+        if cmcontinue == None:
+            resp = site.api("query", list="categorymembers", cmtitle=cattitle, cmtype="subcat", cmlimit=50)
+        else:
+            resp = site.api("query", list="categorymembers", cmtitle=cattitle, cmtype="subcat", cmlimit=50, cmcontinue=cmcontinue)
+        ret.extend([x['title'] for x in resp['query']['categorymembers']])
+        if 'continue' in resp:
+            cmcontinue = resp['continue']['cmcontinue']
+        else:
+            break
+    if objects:
+        # print "converting to page objects ({0})".format(len(ret))
+        ret = [site.pages[x] for x in ret]
+    return ret
+
+"""
+>>> c.page_title
+'Équipes'
+>>> c.name
+'Catégorie:Équipes'
+"""
+"""
+graph = {
+    nodes: [
+        {name: "Bienvenue"}
+    ]
+    links: [
+        {source: "name", target: "name2"}
+    ]
+}
+"""
+redirects = {}
+pages = []
+count = 0
+all_links = set()
+page_exists = {}
+
+def resolve (x):
+    while x in redirects:
+        x = redirects[x]
+    return x
+
+print ("Pass 1")
+for p in site.allpages():
+    r = p.redirects_to()
+    if (r):
+        redirects[p.name] = r.name
+    else:
+        page_exists[p.name] = True
+
+print ("Pass 2")
+# pages_by_title = {}
+for p in site.allpages():
+    if (p.name in redirects):
+        continue
+    pd = {}
+    pd['title'] = p.page_title
+    pd['ns'] = 0
+    print ("Page {0}".format(p.name), file=sys.stderr)
+
+    # categories
+    cats = [c.page_title for c in p.categories()]
+    pd['cats'] = cats
+
+    # links
+    links = [x for x in p.links() if x.namespace == 0]
+    links = [resolve(x.name) for x in links]
+    links = [x for x in links if x in page_exists]
+    for l in links:
+        if p.name < l:
+            link = (p.name, l)
+        else:
+            link = (l, p.name)
+        all_links.add(link)
+
+    pages.append(pd)
+    count += 1
+    if args.limit and count >= args.limit:
+        break
+
+graph = {}
+graph['nodes'] = pages
+graph['links'] = [{'source': a, 'target': b} for a, b in all_links]
+graph['redirects'] = redirects
+print (json.dumps(graph, indent=2), file=args.output)
diff --git a/scripts/categories.py b/scripts/categories.py
new file mode 100644
index 0000000..97e05cc
--- /dev/null
+++ b/scripts/categories.py
@@ -0,0 +1,91 @@
+from mwclient import Site, APIError
+from mwclient.page import Page
+import argparse, json, sys
+
+import unidecode
+# unaccented_string = unidecode.unidecode(accented_string)
+
+ap = argparse.ArgumentParser("")
+ap.add_argument("--wikiprotocol", default="http")
+ap.add_argument("--wikihost", default="localhost")
+ap.add_argument("--wikipath", default="/mw/")
+ap.add_argument("--limit", default=None)
+ap.add_argument("--output", default=sys.stdout, type=argparse.FileType('w'))
+# ap.add_argument("--user", default=None)
+# ap.add_argument("--password", default=None)
+args = ap.parse_args()
+
+site = Site((args.wikiprotocol, args.wikihost), path=args.wikipath)
+ 
+def category_subcats (site, cattitle, objects=True):
+    cmcontinue = None
+    ret = []
+    while True:
+        if cmcontinue == None:
+            resp = site.api("query", list="categorymembers", cmtitle=cattitle, cmtype="subcat", cmlimit=50)
+        else:
+            resp = site.api("query", list="categorymembers", cmtitle=cattitle, cmtype="subcat", cmlimit=50, cmcontinue=cmcontinue)
+        ret.extend([x['title'] for x in resp['query']['categorymembers']])
+        if 'continue' in resp:
+            cmcontinue = resp['continue']['cmcontinue']
+        else:
+            break
+    if objects:
+        # print "converting to page objects ({0})".format(len(ret))
+        ret = [site.pages[x] for x in ret]
+    return ret
+
+def strip_namespace (x):
+    if ":" in x:
+       return x.split(":", 1)[1]
+    return x
+
+cats = list(site.allcategories())
+cats.sort(key=lambda x: unidecode.unidecode(x.name))
+# cats_by_name = {}
+cats = [{ 'title': cat.page_title, 'name': cat.name } for cat in cats]
+index = {}
+for c in cats:
+    index[c['title']] = c
+
+for c in cats:
+    sc = category_subcats(site, c['name'], objects=False)
+    sc = [strip_namespace(x) for x in sc]
+    if sc:
+        for subcat in sc:
+            subcat = index[subcat]
+            if 'parent' not in subcat:
+                subcat['parent'] = c
+
+def make_hierarchy (items):
+    root = {'children': []}
+    for item in items:
+        if 'parent' in item:
+            if 'children' not in item['parent']:
+                item['parent']['children'] = []
+            item['parent']['children'].append(item)
+            item['parent'] = item['parent']['title']
+            # del item['parent']
+        else:
+            root['children'].append(item)
+    return root
+
+def flatten (root, depth=0):
+    for x in root['children']:
+        r = {'title': x['title'], 'name': x['name'], 'depth': depth}
+        if 'parent' in x:
+            r['parent'] = x['parent']
+        yield(r)
+        if 'children' in x:
+            for item in flatten(x, depth+1):
+                yield item
+
+import json
+root = make_hierarchy(cats)
+#print (json.dumps(root, indent=2), file=args.output)
+
+flat = list(flatten(root))
+print (json.dumps(flat, indent=2), file=args.output)
+
+
+
diff --git a/sitemap.json b/sitemap.json
new file mode 100644
index 0000000..e18cf2b
--- /dev/null
+++ b/sitemap.json
@@ -0,0 +1,6116 @@
+{
+  "links": [
+    {
+      "source": "Artistic Practices and Scientific Complexity",
+      "target": "Kobe Matthys"
+    },
+    {
+      "source": "Drawing",
+      "target": "Rapha\u00ebl Van Lerberghe"
+    },
+    {
+      "source": "Narration - Atelier pluridisciplinaire (B1)",
+      "target": "St\u00e9phane No\u00ebl"
+    },
+    {
+      "source": "20.000 images sous les yeux",
+      "target": "Sabine Voglaire"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Nicolas Prignot"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Simona Denicolai"
+    },
+    {
+      "source": "20.000 images sous les yeux",
+      "target": "J\u00e9r\u00f4me Degive"
+    },
+    {
+      "source": "Fr\u00e9d\u00e9ric Gaillard",
+      "target": "Sculpture Art"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Illustration (BA)"
+    },
+    {
+      "source": "Damien Safie",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Genevi\u00e8ve Casterman",
+      "target": "LoopRoom - Micro Narrative"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Programme d'\u00e9tudes d\u00e9taill\u00e9 du 1er bloc du 1er cycle (60 cr\u00e9dits) - B1"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Manu Blondiau"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "Rencontres autour de travaux d'\u00e9tudiants"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Je t\u2019aime, moi non plus (Six le\u00e7ons sur l\u2019image et le texte)"
+    },
+    {
+      "source": "Le calendrier acad\u00e9mique",
+      "target": "Pour les \u00e9tudiants"
+    },
+    {
+      "source": "Je ne construis pas - \u00c9criture mat\u00e9riau \u2013 mat\u00e9riau d\u2019\u00e9criture",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Webring P2P Client, server, auteur sur le web peer to peer",
+      "target": "Winter School"
+    },
+    {
+      "source": "Fleur Courtois",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Digital arts / Coding",
+      "target": "Marc Wathieu"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "\u00c0 propos"
+    },
+    {
+      "source": "St\u00e9phanie Vilayphiou",
+      "target": "Ustensiles num\u00e9riques"
+    },
+    {
+      "source": "Bande dessin\u00e9e",
+      "target": "Bande dessin\u00e9e (MA)"
+    },
+    {
+      "source": "Gilbert Fastenaekens",
+      "target": "Photographie (MA)"
+    },
+    {
+      "source": "Gilbert Fastenaekens",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Laurent Baudoux",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Signe, Image, Ic\u00f4ne, Glyphes, Emojis, Pictos, No-Logo",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (MA)",
+      "target": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)"
+    },
+    {
+      "source": "Cin\u00e9ma d'animation",
+      "target": "Cin\u00e9ma d\u2019animation (BA)"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "Teaching To Transgress"
+    },
+    {
+      "source": "Dessin modulaire",
+      "target": "Sabine Voglaire"
+    },
+    {
+      "source": "Ludivine Loiseau",
+      "target": "Typography"
+    },
+    {
+      "source": "Arts num\u00e9riques (BA)",
+      "target": "Bachelors"
+    },
+    {
+      "source": "Eleanor Ivory Weber",
+      "target": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)"
+    },
+    {
+      "source": "Monique Renault",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Loraine Furter",
+      "target": "\u00c9tude des artefacts (M1-M2)"
+    },
+    {
+      "source": "Manu Blondiau",
+      "target": "Media - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Informations utiles",
+      "target": "L\u2019enseignement inclusif \u00e0 l\u2019erg"
+    },
+    {
+      "source": "Giovanni Guarini",
+      "target": "Wall In Progress"
+    },
+    {
+      "source": "Laurent Baudoux",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Peinture (BA)"
+    },
+    {
+      "source": "Bande dessin\u00e9e (BA)",
+      "target": "Olivier Grenson"
+    },
+    {
+      "source": "Peggy Pierrot",
+      "target": "Th\u00e9orie de la communication (M1-M2)"
+    },
+    {
+      "source": "Creux et relief / mixte technique / aquatinte morsure directe et xylogravure",
+      "target": "Dani\u00e8le Leclercq"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Vid\u00e9ographie (BA)"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)"
+    },
+    {
+      "source": "Orientations at erg",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Outils techniques",
+      "target": "Ustensiles num\u00e9riques"
+    },
+    {
+      "source": "Actualit\u00e9 culturelles / actualit\u00e9 et lecture de l\u2019art (M2)",
+      "target": "Catherine Mayeur"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (BA)",
+      "target": "Narration - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Lionel Maes",
+      "target": "Pierre-Philippe Duch\u00e2telet"
+    },
+    {
+      "source": "Technical courses",
+      "target": "Xavier Garc\u00eda Bard\u00f3n"
+    },
+    {
+      "source": "Installation/Performance",
+      "target": "Installation/Performance (BA)"
+    },
+    {
+      "source": "Fr\u00e9d\u00e9ric Dupont",
+      "target": "Outils et pratiques audiovisuels"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires : Narration",
+      "target": "Narration - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Ivo Provoost",
+      "target": "Orly - les man\u0153uvres du ventriloque"
+    },
+    {
+      "source": "Alain Goffin",
+      "target": "Bande dessin\u00e9e (MA)"
+    },
+    {
+      "source": "Typographie",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)",
+      "target": "Rencontres autour de travaux d'\u00e9tudiants"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Sculpture",
+      "target": "Sculpture (MA)"
+    },
+    {
+      "source": "Giampiero Caiti",
+      "target": "Je t\u2019aime, moi non plus (Six le\u00e7ons sur l\u2019image et le texte)"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Calendrier acad\u00e9mique",
+      "target": "Informations utiles"
+    },
+    {
+      "source": "Cin\u00e9ma-vid\u00e9o (B2)",
+      "target": "In\u00e8s Rabad\u00e1n"
+    },
+    {
+      "source": "Bande dessin\u00e9e (BA)",
+      "target": "Narration - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : \u00e0 pleins renvers\u00e9s",
+      "target": "Renaud Huberlant"
+    },
+    {
+      "source": "Fa, fe, fo, fr, fs, ft, fb, fh, fu, fy",
+      "target": "Marie-Christophe Lambert"
+    },
+    {
+      "source": "Manoeuvres s\u00e9rigraphiques",
+      "target": "Orly - les man\u0153uvres du ventriloque"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Lionel Maes"
+    },
+    {
+      "source": "Maxime Lambrecht",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Peinture (BA)"
+    },
+    {
+      "source": "Image num\u00e9rique",
+      "target": "St\u00e9phane No\u00ebl"
+    },
+    {
+      "source": "Dessin",
+      "target": "Dessin (MA)"
+    },
+    {
+      "source": "Antoine Meyer",
+      "target": "Photography"
+    },
+    {
+      "source": "Ab\u00e9c\u00e9daire et autres lieux",
+      "target": "Carolina Serra"
+    },
+    {
+      "source": "In\u00e8s Rabad\u00e1n",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Admission 2019-2020",
+      "target": "Informations utiles"
+    },
+    {
+      "source": "Le r\u00e8glement des \u00e9tudes",
+      "target": "Pour les \u00e9tudiants"
+    },
+    {
+      "source": "Dessin / le fait main num\u00e9rique",
+      "target": "St\u00e9phanie Vilayphiou"
+    },
+    {
+      "source": "Narration - Atelier pluridisciplinaire (B1)",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Le stage interne",
+      "target": "S\u00e9rigraphie"
+    },
+    {
+      "source": "A sitcom workshop",
+      "target": "Alexander Schellow"
+    },
+    {
+      "source": "Pratiques Num\u00e9riques B2-B3",
+      "target": "Programmation num\u00e9rique"
+    },
+    {
+      "source": "Admission Bachelor 1",
+      "target": "CAS 2"
+    },
+    {
+      "source": "Workshop Rideau de perles Erg-bookscanner",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Media - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Dessin modulaire"
+    },
+    {
+      "source": "Outils techniques",
+      "target": "Son (B2)"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Le blog de multimedialab.be"
+    },
+    {
+      "source": "Brigitte Ledune",
+      "target": "Ecriture / cr\u00e9ation textuelle (B3)"
+    },
+    {
+      "source": "H\u00e9l\u00e8ne Bernard",
+      "target": "Outils et pratiques audiovisuels"
+    },
+    {
+      "source": "Alexia de Visscher",
+      "target": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)"
+    },
+    {
+      "source": "Alain Goffin",
+      "target": "Je t\u2019aime, moi non plus (Six le\u00e7ons sur l\u2019image et le texte)"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Marie Feyereisen"
+    },
+    {
+      "source": "AP dramaturgie BAC 1",
+      "target": "St\u00e9phane No\u00ebl"
+    },
+    {
+      "source": "Curlybraces",
+      "target": "Programmation num\u00e9rique"
+    },
+    {
+      "source": "Adopter une \u0153uvre",
+      "target": "Ateliers pluridisciplinaires : Media"
+    },
+    {
+      "source": "Chlo\u00e9 Malcotti",
+      "target": "Videography"
+    },
+    {
+      "source": "Contact",
+      "target": "Informations utiles"
+    },
+    {
+      "source": "Carolina Serra",
+      "target": "Sciences humaines et sociales / anthropologie (B2)"
+    },
+    {
+      "source": "Erg Graphisme Master",
+      "target": "Graphisme (MA)"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires : Media",
+      "target": "Media - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Permanence quotidienne assur\u00e9e par Rapha\u00ebl Pirenne.",
+      "target": "Winter School"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires : Media",
+      "target": "Media - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Christophe Wavelet",
+      "target": "Rencontres autour de travaux d'\u00e9tudiants"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Renaud Huberlant",
+      "target": "Typographie Master 2"
+    },
+    {
+      "source": "Marie Feyereisen",
+      "target": "Orly - les man\u0153uvres du ventriloque"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Ateliers pluridisciplinaires (BA)"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Orientations at erg"
+    },
+    {
+      "source": "Antoine Meyer",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Illustration",
+      "target": "Illustration (BA)"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "S\u00e9minaire Vid\u00e9o"
+    },
+    {
+      "source": "Alain Goffin",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Como Abrir Um Site De Vendas",
+      "target": "The Networked Social"
+    },
+    {
+      "source": "Du concept \u00e9ditorial \u00e0 l'impression",
+      "target": "Isabelle Jossa"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Contact"
+    },
+    {
+      "source": "Orientations at erg",
+      "target": "Sculpture Art"
+    },
+    {
+      "source": "Signe, Image, Ic\u00f4ne, Glyphes, Emojis, Pictos, No-Logo",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Workshop Tarot Souriau",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "In\u00e8s Rabad\u00e1n",
+      "target": "Narration - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Programme d'\u00e9tudes d\u00e9taill\u00e9 du 1er bloc du 1er cycle (60 cr\u00e9dits) - B1",
+      "target": "Programmes d'\u00e9tudes - Grilles de cours"
+    },
+    {
+      "source": "Dessin modulaire",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Vimeo"
+    },
+    {
+      "source": "Atelier Pluridisciplinaire Media Bac 3",
+      "target": "Damien Safie"
+    },
+    {
+      "source": "Guy Wouet\u00e9",
+      "target": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)"
+    },
+    {
+      "source": "S\u00e9minaire Vid\u00e9o",
+      "target": "Xavier Garc\u00eda Bard\u00f3n"
+    },
+    {
+      "source": "Arts num\u00e9riques",
+      "target": "Arts num\u00e9riques (BA)"
+    },
+    {
+      "source": "AP dramaturgie BAC 1",
+      "target": "Joanna Lorho"
+    },
+    {
+      "source": "Guy Wouet\u00e9",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Laurent Baudoux",
+      "target": "New Poster Cult"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Une fabrique d\u2019images, un outil de pens\u00e9e"
+    },
+    {
+      "source": "Maxime Jean-Baptiste",
+      "target": "Re*enacting Memories Of Struggles"
+    },
+    {
+      "source": "Ab\u00e9c\u00e9daire et autres lieux",
+      "target": "Michela Sacchetto"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Theoretical courses",
+      "target": "Xavier Garc\u00eda Bard\u00f3n"
+    },
+    {
+      "source": "Dani\u00e8le Leclercq",
+      "target": "Workshop gravure, Creux et relief / mixte technique / aquatinte morsure directe et xylogravure"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Formats, canons, gaufriers, en marge super max-width!"
+    },
+    {
+      "source": "Chlo\u00e9 Malcotti",
+      "target": "Vid\u00e9ographie (BA)"
+    },
+    {
+      "source": "Cultures num\u00e9riques",
+      "target": "Th\u00e9orie et pratique des nouvelles technologies / Cultures num\u00e9riques - une bo\u00eete \u00e0 outils (B1)"
+    },
+    {
+      "source": "Loraine Furter",
+      "target": "Multiples agencements du politique"
+    },
+    {
+      "source": "Vid\u00e9ographie",
+      "target": "Vid\u00e9ographie (MA)"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Multiples agencements du politique"
+    },
+    {
+      "source": "David Evrard",
+      "target": "Sculpture Art"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Fr\u00e9d\u00e9ric Gaillard"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "Digital non-binaire"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Interfaces \u00e9lectroniques"
+    },
+    {
+      "source": "BAC ERG CVG",
+      "target": "Communication visuelle et graphique"
+    },
+    {
+      "source": "Dessin modulaire",
+      "target": "Laurent Baudoux"
+    },
+    {
+      "source": "Photographie",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "Gender fluid : Bye bye binary \u2014 des imaginaires possibles autour d\u2019une typographie inclusive"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Sculpture (BA)"
+    },
+    {
+      "source": "Formats, canons, gaufriers, en marge super max-width!",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Fleur Courtois",
+      "target": "Workshop Tarot Souriau"
+    },
+    {
+      "source": "Cin\u00e9ma-vid\u00e9o (B2)",
+      "target": "Outils techniques"
+    },
+    {
+      "source": "Fabrique d\u2019images \u2013 Mythologies singuli\u00e8res",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Plan d'\u00e9tude interactif",
+      "target": "Workshop Juillet 2017"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "Wall In Progress"
+    },
+    {
+      "source": "Illustration (BA)",
+      "target": "Joanna Lorho"
+    },
+    {
+      "source": "Catherine Mayeur",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Ressources",
+      "target": "Xml collection"
+    },
+    {
+      "source": "Media - Atelier pluridisciplinaire (B3)",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Les lieux",
+      "target": "Plancube"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Laurent Baudoux"
+    },
+    {
+      "source": "Manon De Boer",
+      "target": "Vid\u00e9ographie (MA)"
+    },
+    {
+      "source": "Multiples agencements du politique",
+      "target": "Pierre-Philippe Duch\u00e2telet"
+    },
+    {
+      "source": "Hashich, in.",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Erg-succursale",
+      "target": "Installation/Performance (MA)"
+    },
+    {
+      "source": "LOOP ROOM",
+      "target": "Winter School"
+    },
+    {
+      "source": "Admission 2019-2020",
+      "target": "Admission Bachelor 1"
+    },
+    {
+      "source": "Outils et pratiques audiovisuels",
+      "target": "Outils techniques"
+    },
+    {
+      "source": "Fran\u00e7oise Tahon",
+      "target": "Media - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "St\u00e9phanie Vilayphiou",
+      "target": "Ustensiles"
+    },
+    {
+      "source": "Pierre-Philippe Duch\u00e2telet",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Illustration (BA)",
+      "target": "Olivier Grenson"
+    },
+    {
+      "source": "BREAKING NEWS!",
+      "target": "Manuela Dechamps Otamendi"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Arts num\u00e9riques (BA)"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Lotte Arndt"
+    },
+    {
+      "source": "Communication visuelle et graphique",
+      "target": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)"
+    },
+    {
+      "source": "Juan d\u2019Oultremont",
+      "target": "Orly - les man\u0153uvres du ventriloque"
+    },
+    {
+      "source": "Peinture",
+      "target": "Peinture (BA)"
+    },
+    {
+      "source": "Sabine Voglaire",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Arts num\u00e9riques (BA)",
+      "target": "Yves Bernard"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Dessin (BA)"
+    },
+    {
+      "source": "Fran\u00e7oise Tahon",
+      "target": "Graphisme (MA)"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)"
+    },
+    {
+      "source": "St\u00e9phane No\u00ebl",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Fabrique d\u2019images \u2013 Mythologies singuli\u00e8res",
+      "target": "Une fabrique d\u2019images, un outil de pens\u00e9e"
+    },
+    {
+      "source": "Magali Michaux",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "...gira nello spazio senza fine",
+      "target": "Anne Marquet"
+    },
+    {
+      "source": "FDDDL",
+      "target": "Les lieux"
+    },
+    {
+      "source": "Fran\u00e7ois De Jonge",
+      "target": "Outils et pratiques audiovisuels"
+    },
+    {
+      "source": "Sven Augustijnen",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Caroline Van Damme",
+      "target": "Sciences humaines et sociales / psychanalyse (B3)"
+    },
+    {
+      "source": "A sitcom workshop",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Marie Feyereisen",
+      "target": "S\u00e9rigraphie"
+    },
+    {
+      "source": "Curlybraces",
+      "target": "Lionel Maes"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "Du concept \u00e9ditorial \u00e0 l'impression"
+    },
+    {
+      "source": "Vid\u00e9ographie",
+      "target": "Vid\u00e9ographie (BA)"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : \u00e0 pleins renvers\u00e9s",
+      "target": "Ludivine Loiseau"
+    },
+    {
+      "source": "AP dramaturgie BAC 1",
+      "target": "Narration - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Histoire et actualit\u00e9 des arts / m\u00e9dia (B1)",
+      "target": "Michela Sacchetto"
+    },
+    {
+      "source": "Genevi\u00e8ve Casterman",
+      "target": "Illustration (BA)"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Ateliers pluridisciplinaires (BA)"
+    },
+    {
+      "source": "Typographie",
+      "target": "ZigzagAnimal"
+    },
+    {
+      "source": "Programme d'\u00e9tudes d\u00e9taill\u00e9 du 1er cycle - B2-B3",
+      "target": "Programmes d'\u00e9tudes - Grilles de cours"
+    },
+    {
+      "source": "Marie-No\u00eblle Boutin",
+      "target": "Photography"
+    },
+    {
+      "source": "...gira nello spazio senza fine",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Typographie (BA)",
+      "target": "Typographie - module"
+    },
+    {
+      "source": "Fabrique d\u2019images \u2013 Mythologies singuli\u00e8res",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Sculpture (BA)"
+    },
+    {
+      "source": "Ludivine Loiseau",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Rapha\u00ebl Pirenne",
+      "target": "S\u00e9miologie (M1)"
+    },
+    {
+      "source": "Marcel Berlanger",
+      "target": "Painting"
+    },
+    {
+      "source": "Maryam Kolly",
+      "target": "S\u00e9minaire Politique et exp\u00e9rimentation graphiques"
+    },
+    {
+      "source": "LoopRoom - Micro Narrative",
+      "target": "Sylvie Bouteiller"
+    },
+    {
+      "source": "Dessin modulaire",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Giovanni Guarini",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Alexis Zimmer",
+      "target": "Nicolas Prignot"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Digital non-binaire"
+    },
+    {
+      "source": "Nicolas Prignot",
+      "target": "Philosophie contemporaine (M1)"
+    },
+    {
+      "source": "Droit de la Cr\u00e9ation et de l'Information",
+      "target": "Maxime Lambrecht"
+    },
+    {
+      "source": "Adopter une \u0153uvre",
+      "target": "Manu Blondiau"
+    },
+    {
+      "source": "Isabelle Jossa",
+      "target": "Une fabrique d\u2019images, un outil de pens\u00e9e"
+    },
+    {
+      "source": "Atelier Pluridisciplinaire Media Bac 3",
+      "target": "Isabelle Jossa"
+    },
+    {
+      "source": "Alain Goffin",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Formats, canons, gaufriers, en marge super max-width!",
+      "target": "Giampiero Caiti"
+    },
+    {
+      "source": "Florence Delhaye",
+      "target": "Man\u0153uvres s\u00e9rigraphiques"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "New Poster Cult"
+    },
+    {
+      "source": "Le stage interne",
+      "target": "Vid\u00e9ographie (BA)"
+    },
+    {
+      "source": "Alain Goffin",
+      "target": "Typography"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Arts num\u00e9riques (BA)"
+    },
+    {
+      "source": "Graphic Scores",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Digital non-binaire",
+      "target": "St\u00e9phanie Vilayphiou"
+    },
+    {
+      "source": "St\u00e9phanie Vilayphiou",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Media - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Actualit\u00e9 culturelles / actualit\u00e9 et lecture de l\u2019art (M1)",
+      "target": "Christophe Wavelet"
+    },
+    {
+      "source": "Outils techniques",
+      "target": "Programmation num\u00e9rique"
+    },
+    {
+      "source": "Anne Valkenborgh",
+      "target": "Creux et relief / mixte technique / aquatinte morsure directe et xylogravure"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Ivo Provoost"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : poch\u00e9es et variables",
+      "target": "Marie-Christophe Lambert"
+    },
+    {
+      "source": "Isabel Burr Raty",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Kobe Matthys",
+      "target": "Pratiques artistiques et complexit\u00e9 scientifique (MA)"
+    },
+    {
+      "source": "Joachim Lacrosse",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Ivo Provoost"
+    },
+    {
+      "source": "Ivo Provoost",
+      "target": "Simona Denicolai"
+    },
+    {
+      "source": "Media - Atelier pluridisciplinaire (B1)",
+      "target": "Sabine Voglaire"
+    },
+    {
+      "source": "DESIGN ECONOMICS",
+      "target": "Winter School"
+    },
+    {
+      "source": "Re*enacting Memories Of Struggles",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "BAC ERG CVG",
+      "target": "Espace culturels polyvalents"
+    },
+    {
+      "source": "Admission 2019-2020",
+      "target": "Admission en cours d\u2019\u00e9tudes (Bachelor 2, 3 & Masters)"
+    },
+    {
+      "source": "Damien Safie",
+      "target": "Typography"
+    },
+    {
+      "source": "Christophe Wavelet",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Outils techniques",
+      "target": "Techniques fondamentales, dessin (B2)"
+    },
+    {
+      "source": "Les formes politiques de Shirley Clarke",
+      "target": "Winter School"
+    },
+    {
+      "source": "D\u00e9p\u00f4t Local",
+      "target": "Les lieux"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Document / Monument / m\u00e9moires interm\u00e9diaires"
+    },
+    {
+      "source": "Gilbert Fastenaekens",
+      "target": "Photography"
+    },
+    {
+      "source": "Le s\u00e9minaire de l'erg",
+      "target": "S\u00e9minaire 2018 : No Commons Without Commoning"
+    },
+    {
+      "source": "Nicolas Prignot",
+      "target": "Workshop Tarot Souriau"
+    },
+    {
+      "source": "Winter School",
+      "target": "Workshop Rideau de Perles"
+    },
+    {
+      "source": "St\u00e9phane No\u00ebl",
+      "target": "Xml collection"
+    },
+    {
+      "source": "Dani\u00e8le Leclercq",
+      "target": "Gravure Bois, lino & litho"
+    },
+    {
+      "source": "Dessin / storyboard",
+      "target": "G\u00e9rard Goffaux"
+    },
+    {
+      "source": "Rapha\u00ebl Pirenne",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Fabrique d\u2019images \u2013 Mythologies singuli\u00e8res",
+      "target": "Giovanni Guarini"
+    },
+    {
+      "source": "Informations utiles",
+      "target": "Minerval"
+    },
+    {
+      "source": "Vid\u00e9ographie (BA)",
+      "target": "Yvan Flasse"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Sculpture (BA)"
+    },
+    {
+      "source": "Catherine Mayeur",
+      "target": "Histoire et actualit\u00e9 des arts / image (B2)"
+    },
+    {
+      "source": "Rideau de perles",
+      "target": "Workshop Rideau de perles Erg-bookscanner"
+    },
+    {
+      "source": "Elke de Rijcke",
+      "target": "Litt\u00e9rature contemporaine (B2)"
+    },
+    {
+      "source": "Cin\u00e9ma-vid\u00e9o Bac 3",
+      "target": "Outils techniques"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : poch\u00e9es et variables",
+      "target": "Ludivine Loiseau"
+    },
+    {
+      "source": "Eric Angenot",
+      "target": "Peinture (BA)"
+    },
+    {
+      "source": "Dessin",
+      "target": "Dessin (BA)"
+    },
+    {
+      "source": "Marie-Christophe Lambert",
+      "target": "Typography"
+    },
+    {
+      "source": "A sitcom workshop",
+      "target": "Nicolas Marcon"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (BA)",
+      "target": "Media - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Lionel Maes"
+    },
+    {
+      "source": "Alexander Schellow",
+      "target": "Design et Politique du multiple (MA)"
+    },
+    {
+      "source": "Communication visuelle et graphique (MA)",
+      "target": "New Poster Cult"
+    },
+    {
+      "source": "Illustration - Comics",
+      "target": "Olivier Grenson"
+    },
+    {
+      "source": "Harrisson",
+      "target": "New Poster Cult"
+    },
+    {
+      "source": "Constant",
+      "target": "Wendy Van Wynsberghe"
+    },
+    {
+      "source": "Adopter une \u0153uvre",
+      "target": "Isabelle Jossa"
+    },
+    {
+      "source": "De l\u2019oeuvre \u00e0 l\u2019imprim\u00e9",
+      "target": "Outils techniques"
+    },
+    {
+      "source": "Gravure Bois, lino & litho",
+      "target": "Le stage interne"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Dessin (BA)"
+    },
+    {
+      "source": "Media - Atelier pluridisciplinaire (B2)",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "S\u00e9minaire Politique et exp\u00e9rimentation graphiques"
+    },
+    {
+      "source": "Adopter une \u0153uvre",
+      "target": "Marie-Christophe Lambert"
+    },
+    {
+      "source": "Laurent Baudoux",
+      "target": "Typography"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Installation/Performance (BA)"
+    },
+    {
+      "source": "Adopter une \u0153uvre",
+      "target": "Giovanni Guarini"
+    },
+    {
+      "source": "Arts num\u00e9riques",
+      "target": "Arts num\u00e9riques (MA)"
+    },
+    {
+      "source": "Caroline Van Damme",
+      "target": "Sciences humaines et sociales / psychanalyse (M1)"
+    },
+    {
+      "source": "Labobine",
+      "target": "LoopRoom - Micro Narrative"
+    },
+    {
+      "source": "Loraine Furter",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Erg, what is it ?",
+      "target": "Multidisciplinary Workshops - BA"
+    },
+    {
+      "source": "Atelier Pluridisciplinaire Media Bac 3",
+      "target": "Marie-Christophe Lambert"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Artistic Practices and Scientific Complexity",
+      "target": "Giampiero Caiti"
+    },
+    {
+      "source": "Christine Meisner",
+      "target": "Drawing"
+    },
+    {
+      "source": "Maxime Jean-Baptiste",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Narration - Atelier pluridisciplinaire (B1)",
+      "target": "Vid\u00e9ographie (BA)"
+    },
+    {
+      "source": "Multiples agencements du politique",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Projet p\u00e9dagogique"
+    },
+    {
+      "source": "Informations utiles",
+      "target": "R\u00e8glement des \u00e9tudes"
+    },
+    {
+      "source": "Signe, Image, Ic\u00f4ne, Glyphes, Emojis, Pictos, No-Logo",
+      "target": "Typography"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (BA)",
+      "target": "Narration - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Alexander Schellow",
+      "target": "Cin\u00e9ma d\u2019animation (MA)"
+    },
+    {
+      "source": "J\u00e9r\u00f4me Degive",
+      "target": "Media - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Dominique Goblet",
+      "target": "Illustration (MA)"
+    },
+    {
+      "source": "Digital arts / Coding",
+      "target": "Yves Bernard"
+    },
+    {
+      "source": "BAC ERG CVG",
+      "target": "S\u00e9bastien Lacomblez"
+    },
+    {
+      "source": "...gira nello spazio senza fine",
+      "target": "Gilbert Fastenaekens"
+    },
+    {
+      "source": "Eric Angenot",
+      "target": "Marcel Berlanger"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Simona Denicolai"
+    },
+    {
+      "source": "Anne Valkenborgh",
+      "target": "Gravure M\u00e9tal"
+    },
+    {
+      "source": "BREAKING NEWS!",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Alexia de Visscher",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Peinture",
+      "target": "Peinture (MA)"
+    },
+    {
+      "source": "Installation/Performance (BA)",
+      "target": "Juan d\u2019Oultremont"
+    },
+    {
+      "source": "Media - Atelier pluridisciplinaire (B1)",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Enseignants",
+      "target": "O\u00f9? Quoi? Comment? Qui?"
+    },
+    {
+      "source": "Eleanor Ivory Weber",
+      "target": "S\u00e9minaire"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Juan d\u2019Oultremont"
+    },
+    {
+      "source": "Ab\u00e9c\u00e9daire et autres lieux",
+      "target": "Rapha\u00ebl Pirenne"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Fr\u00e9d\u00e9ric Gaillard"
+    },
+    {
+      "source": "Drawing",
+      "target": "Orientations at erg"
+    },
+    {
+      "source": "Antoine Boute",
+      "target": "Ecriture / cr\u00e9ation textuelle (B1)"
+    },
+    {
+      "source": "Mise en page et pratique de l'impression",
+      "target": "Nicolas Storck"
+    },
+    {
+      "source": "Performance et r\u00e9gimes performatifs en art depuis le XX\u00e8 si\u00e8cle",
+      "target": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)"
+    },
+    {
+      "source": "Harrisson",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale (M2)",
+      "target": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)"
+    },
+    {
+      "source": "...gira nello spazio senza fine",
+      "target": "Marie-No\u00eblle Boutin"
+    },
+    {
+      "source": "Maryam Kolly",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Isabelle Jossa",
+      "target": "Wall In Progress"
+    },
+    {
+      "source": "Giampiero Caiti",
+      "target": "Typography"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Installation/Performance (BA)"
+    },
+    {
+      "source": "Wall In Progress",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Fouilles molles sur disques durs",
+      "target": "Manu Blondiau"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Programme d'\u00e9tudes d\u00e9taill\u00e9 du 1er cycle - B2-B3"
+    },
+    {
+      "source": "Workshop 12h Bande dessin\u00e9e",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Manuela Dechamps Otamendi",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Installation - Performance",
+      "target": "Juan d\u2019Oultremont"
+    },
+    {
+      "source": "English",
+      "target": "Multidisciplinary Workshops - BA"
+    },
+    {
+      "source": "Caroline Dath",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Histoire et actualit\u00e9 des arts / de la Renaissance \u00e0 la fin du 19e si\u00e8cle (B1)",
+      "target": "Monique Renault"
+    },
+    {
+      "source": "Bande dessin\u00e9e (BA)",
+      "target": "Christian Staquet"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Interfaces \u00e9lectroniques"
+    },
+    {
+      "source": "St\u00e9phane No\u00ebl",
+      "target": "Workshop 12h Bande dessin\u00e9e"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "Performance et r\u00e9gimes performatifs en art depuis le XX\u00e8 si\u00e8cle"
+    },
+    {
+      "source": "English",
+      "target": "Multidisciplinary Workshops - MA"
+    },
+    {
+      "source": "Labobine - Salle Super 8",
+      "target": "Les lieux"
+    },
+    {
+      "source": "Outils et pratiques audiovisuels",
+      "target": "Sylvie Bouteiller"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "Dialogues"
+    },
+    {
+      "source": "Animation Department Workshops",
+      "target": "Winter School"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (BA)",
+      "target": "Narration - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Illustration - Comics",
+      "target": "Joanna Lorho"
+    },
+    {
+      "source": "Alain Fran\u00e7ois",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Christophe Wavelet",
+      "target": "Performance et r\u00e9gimes performatifs en art depuis le XX\u00e8 si\u00e8cle"
+    },
+    {
+      "source": "Fa, fe, fo, fr, fs, ft, fb, fh, fu, fy",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Bande dessin\u00e9e (BA)",
+      "target": "Genevi\u00e8ve Casterman"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Isabelle Jossa"
+    },
+    {
+      "source": "Histoire et actualit\u00e9 des arts / m\u00e9dias (B2)",
+      "target": "Isabel Burr Raty"
+    },
+    {
+      "source": "BAC ERG CVG",
+      "target": "Manu Blondiau"
+    },
+    {
+      "source": "Ludivine Loiseau",
+      "target": "Typographie - module"
+    },
+    {
+      "source": "Carolina Serra",
+      "target": "Sciences humaines et sociales / anthropologie (B1)"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Sabine Voglaire"
+    },
+    {
+      "source": "Laurent Baudoux",
+      "target": "Son (B3)"
+    },
+    {
+      "source": "Ab\u00e9c\u00e9daire et autres lieux",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Je t\u2019aime, moi non plus (Six le\u00e7ons sur l\u2019image et le texte)",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Eric Angenot",
+      "target": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)"
+    },
+    {
+      "source": "Histoire et actualit\u00e9 des arts / arts non-europ\u00e9ens (B3)",
+      "target": "Toma Muteba Luntumbue"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires : Media",
+      "target": "Media - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Grmbl",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Laurent Baudoux",
+      "target": "Statuts de l\u2019image / Tourments et d\u00e9tournements"
+    },
+    {
+      "source": "Biblioth\u00e8que",
+      "target": "Contact"
+    },
+    {
+      "source": "Alexander Schellow",
+      "target": "Cin\u00e9ma d\u2019animation (BA)"
+    },
+    {
+      "source": "Man\u0153uvres s\u00e9rigraphiques",
+      "target": "Orly - les man\u0153uvres du ventriloque"
+    },
+    {
+      "source": "Interfaces \u00e9lectroniques",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Orientations at erg",
+      "target": "Typography"
+    },
+    {
+      "source": "Denis Deprez",
+      "target": "Narration - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Babak Afrassiabi",
+      "target": "Workshop Pages Magazine"
+    },
+    {
+      "source": "St\u00e9phanie Vilayphiou",
+      "target": "Workshop Rideau de perles Erg-bookscanner"
+    },
+    {
+      "source": "Alexia de Visscher",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Giampiero Caiti",
+      "target": "Pratiques artistiques et complexit\u00e9 scientifique (MA)"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Elke de Rijcke",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Orientations at erg",
+      "target": "Painting"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Erg.be"
+    },
+    {
+      "source": "Fouilles molles sur disques durs",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Bernadette Kluyskens",
+      "target": "Couleur : analyse et pratiques contextuelles"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Arts num\u00e9riques (BA)"
+    },
+    {
+      "source": "Les livres parl\u00e9s 2017",
+      "target": "Livres parl\u00e9s"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Sabine Voglaire"
+    },
+    {
+      "source": "Antoine Boute",
+      "target": "Technical courses"
+    },
+    {
+      "source": "After Howl",
+      "target": "Sculpture (MA)"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Vid\u00e9ographie (BA)"
+    },
+    {
+      "source": "Sabine Voglaire",
+      "target": "Typography"
+    },
+    {
+      "source": "Workshop gravure, Creux et relief / mixte technique / aquatinte morsure directe et xylogravure",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Ergote Radio",
+      "target": "Les lieux"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires : Art",
+      "target": "Orly - les man\u0153uvres du ventriloque"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Peinture (BA)"
+    },
+    {
+      "source": "Antoine Boute",
+      "target": "\u00c9critures exp\u00e9rimentales"
+    },
+    {
+      "source": "Bernadette Kluyskens",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires : Narration",
+      "target": "Narration - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Bande dessin\u00e9e",
+      "target": "Bande dessin\u00e9e (BA)"
+    },
+    {
+      "source": "Rapha\u00ebl Pirenne",
+      "target": "S\u00e9miologie / image (B1)"
+    },
+    {
+      "source": "Fr\u00e9d\u00e9ric Gaillard",
+      "target": "Sculpture (BA)"
+    },
+    {
+      "source": "Alexia de Visscher",
+      "target": "Workshop Rideau de perles Erg-bookscanner"
+    },
+    {
+      "source": "David Evrard",
+      "target": "Sculpture (MA)"
+    },
+    {
+      "source": "Son (B2)",
+      "target": "Sylvie Bouteiller"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Installation/Performance (BA)"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale (M2)"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "Geste sp\u00e9culatif"
+    },
+    {
+      "source": "English",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Couleur : analyse et pratiques contextuelles",
+      "target": "Outils techniques"
+    },
+    {
+      "source": "Gender fluid : Bye bye binary \u2014 des imaginaires possibles autour d\u2019une typographie inclusive",
+      "target": "Ludivine Loiseau"
+    },
+    {
+      "source": "Graphisme",
+      "target": "Graphisme (MA)"
+    },
+    {
+      "source": "Eric Angenot",
+      "target": "Painting"
+    },
+    {
+      "source": "Image num\u00e9rique",
+      "target": "Outils techniques"
+    },
+    {
+      "source": "Babak Afrassiabi",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Alexis Zimmer",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Photographie",
+      "target": "Photographie (MA)"
+    },
+    {
+      "source": "Caroline Van Damme",
+      "target": "Philosophie g\u00e9n\u00e9rale (B2)"
+    },
+    {
+      "source": "Atelier \u00e0 la KBR (Biblioth\u00e8que royale de Belgique)",
+      "target": "Winter School"
+    },
+    {
+      "source": "O\u00f9? Quoi? Comment? Qui?",
+      "target": "Tutorat"
+    },
+    {
+      "source": "Orly - les man\u0153uvres du ventriloque",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Narration - Atelier pluridisciplinaire (B2)",
+      "target": "Olivier Grenson"
+    },
+    {
+      "source": "Admission 2019-2020",
+      "target": "Bienvenue \u00e0 l\u2019erg"
+    },
+    {
+      "source": "Manu Blondiau",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Signe, Image, Ic\u00f4ne, Glyphes, Emojis, Pictos, No-Logo"
+    },
+    {
+      "source": "Pratiques artistiques et complexit\u00e9 scientifique (MA)",
+      "target": "S\u00e9minaire Politique et exp\u00e9rimentation graphiques"
+    },
+    {
+      "source": "Alain Goffin",
+      "target": "Statuts de l\u2019image / Tourments et d\u00e9tournements"
+    },
+    {
+      "source": "Installation - Performance",
+      "target": "Orientations at erg"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Ateliers pluridisciplinaires : Art"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Dessin / le fait main num\u00e9rique"
+    },
+    {
+      "source": "Formats, canons, gaufriers, en marge super max-width!",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Les lieux",
+      "target": "Print lab"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : \u00e0 pleins renvers\u00e9s",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Adopter une \u0153uvre",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Pierre-Philippe Duch\u00e2telet",
+      "target": "\u00c9tude des artefacts (M1-M2)"
+    },
+    {
+      "source": "Bande dessin\u00e9e (BA)",
+      "target": "Joanna Lorho"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "\u00c9tude des artefacts (M1-M2)"
+    },
+    {
+      "source": "Histoire et actualit\u00e9 des arts. Histoire des arts contemporains / avant-garde au XXe si\u00e8cle (B3)",
+      "target": "Monique Renault"
+    },
+    {
+      "source": "R\u00e9cits et exp\u00e9rimentation\u2192 narration sp\u00e9culative",
+      "target": "Yvan Flasse"
+    },
+    {
+      "source": "Nasrin Tabatabai",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Marie-Christophe Lambert",
+      "target": "Typographie (MA)"
+    },
+    {
+      "source": "Bernadette Kluyskens",
+      "target": "LoopRoom - Micro Narrative"
+    },
+    {
+      "source": "BREAKING NEWS!",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Introduction au textile et \u00e0 l'\u00e9lectronique (Pratiques num\u00e9riques)",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Wall In Progress"
+    },
+    {
+      "source": "Histoire et actualit\u00e9 des arts / m\u00e9dias (B2)",
+      "target": "Maxime Jean-Baptiste"
+    },
+    {
+      "source": "Pratiques artistiques et complexit\u00e9 scientifique (MA)",
+      "target": "\u00c9tude des artefacts (M1-M2)"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Pierre-Philippe Duch\u00e2telet"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : poch\u00e9es et variables",
+      "target": "Renaud Huberlant"
+    },
+    {
+      "source": "Alternatives Canvas",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Vid\u00e9ographie (BA)"
+    },
+    {
+      "source": "Dessin / mod\u00e8le vivant",
+      "target": "Le stage interne"
+    },
+    {
+      "source": "Simona Denicolai",
+      "target": "Traitement des traces"
+    },
+    {
+      "source": "Adopter une \u0153uvre",
+      "target": "Fran\u00e7oise Tahon"
+    },
+    {
+      "source": "Animated film",
+      "target": "Orientations at erg"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (MA)",
+      "target": "Design et Politique du multiple (MA)"
+    },
+    {
+      "source": "Anne Marquet",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Raya Baudinet-Lindberg",
+      "target": "\u00c9criture mat\u00e9riau"
+    },
+    {
+      "source": "Dialogues",
+      "target": "Sven Augustijnen"
+    },
+    {
+      "source": "Anne Marquet",
+      "target": "Photographie (MA)"
+    },
+    {
+      "source": "Communication visuelle et graphique (MA)",
+      "target": "Harrisson"
+    },
+    {
+      "source": "Giampiero Caiti",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Informations utiles",
+      "target": "Plans d'\u00e9tude"
+    },
+    {
+      "source": "Arts num\u00e9riques (MA)",
+      "target": "Yves Bernard"
+    },
+    {
+      "source": "Marcel Berlanger",
+      "target": "Peinture (BA)"
+    },
+    {
+      "source": "R\u00e9cits et exp\u00e9rimentation - Narration sp\u00e9culative (MA)",
+      "target": "Yvan Flasse"
+    },
+    {
+      "source": "Lionel Maes",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Dessin (BA)"
+    },
+    {
+      "source": "Brigitte Ledune",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Ludivine Loiseau",
+      "target": "Typographie (MA)"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Photographie (BA)"
+    },
+    {
+      "source": "Arts num\u00e9riques (BA)",
+      "target": "Graphic Scores"
+    },
+    {
+      "source": "R\u00e9cits et exp\u00e9rimentation - Narration sp\u00e9culative (MA)",
+      "target": "S\u00e9minaire Vid\u00e9o"
+    },
+    {
+      "source": "Typographie",
+      "target": "Typographie (MA)"
+    },
+    {
+      "source": "Christine Meisner",
+      "target": "Dessin (MA)"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : poch\u00e9es et variables",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "St\u00e9phane No\u00ebl",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Alexis Zimmer",
+      "target": "Geste sp\u00e9culatif"
+    },
+    {
+      "source": "Cin\u00e9ma-vid\u00e9o Bac 3",
+      "target": "Xavier Garc\u00eda Bard\u00f3n"
+    },
+    {
+      "source": "English",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Du concept \u00e9ditorial \u00e0 l'impression",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Christian Staquet",
+      "target": "Illustration (BA)"
+    },
+    {
+      "source": "Introduction au textile et \u00e0 l'\u00e9lectronique (Pratiques num\u00e9riques)",
+      "target": "Wendy Van Wynsberghe"
+    },
+    {
+      "source": "Interfaces \u00e9lectroniques",
+      "target": "Wendy Van Wynsberghe"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Sculpture (BA)"
+    },
+    {
+      "source": "Graphisme",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Giovanni Guarini",
+      "target": "Une fabrique d\u2019images, un outil de pens\u00e9e"
+    },
+    {
+      "source": "Videography",
+      "target": "Yvan Flasse"
+    },
+    {
+      "source": "Chantale Anciaux",
+      "target": "Narration - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Ateliers pluridisciplinaires : Art"
+    },
+    {
+      "source": "Eric Angenot",
+      "target": "Peinture (MA)"
+    },
+    {
+      "source": "Carolina Serra",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Animated film",
+      "target": "Nicolas Marcon"
+    },
+    {
+      "source": "Dessin modulaire",
+      "target": "Typography"
+    },
+    {
+      "source": "Erg-paintings",
+      "target": "Peinture"
+    },
+    {
+      "source": "Installation/Performance (MA)",
+      "target": "Juan d\u2019Oultremont"
+    },
+    {
+      "source": "Illustration",
+      "target": "Illustration (MA)"
+    },
+    {
+      "source": "Actualit\u00e9s culturelles / Actualit\u00e9 et lectures de l\u2019art / Modernit\u00e9 (B2)",
+      "target": "Rapha\u00ebl Pirenne"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (MA)",
+      "target": "Pratiques artistiques et complexit\u00e9 scientifique (MA)"
+    },
+    {
+      "source": "Fabrizio Terranova",
+      "target": "R\u00e9cits et exp\u00e9rimentation\u2192 narration sp\u00e9culative"
+    },
+    {
+      "source": "Erg-paintings",
+      "target": "Eric Angenot"
+    },
+    {
+      "source": "Geste sp\u00e9culatif",
+      "target": "Nicolas Prignot"
+    },
+    {
+      "source": "Dessin modulaire",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Alexander Schellow",
+      "target": "Animated film"
+    },
+    {
+      "source": "Sylvie Bouteiller",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Media - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Illustration (BA)",
+      "target": "Narration - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Informations utiles",
+      "target": "Tutorat"
+    },
+    {
+      "source": "Man\u0153uvres s\u00e9rigraphiques",
+      "target": "Marie Feyereisen"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires : Narration",
+      "target": "Narration - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Fouilles molles sur disques durs",
+      "target": "Lionel Maes"
+    },
+    {
+      "source": "Isabelle Jossa",
+      "target": "Media - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "LoopRoom - Micro Narrative",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Signe, Image, Ic\u00f4ne, Glyphes, Emojis, Pictos, No-Logo"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Bienvenue \u00e0 l\u2019erg"
+    },
+    {
+      "source": "Fran\u00e7oise Tahon",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Structures temporaires ?",
+      "target": "Winter School"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Maryam Kolly"
+    },
+    {
+      "source": "Alternatives Canvas",
+      "target": "Marcel Berlanger"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (MA)",
+      "target": "R\u00e9cits et exp\u00e9rimentation - Narration sp\u00e9culative (MA)"
+    },
+    {
+      "source": "Informations utiles",
+      "target": "Service social"
+    },
+    {
+      "source": "Formats, canons, gaufriers, en marge super max-width!",
+      "target": "Typography"
+    },
+    {
+      "source": "Isabelle Martin",
+      "target": "Narration - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Fleur Courtois",
+      "target": "S\u00e9miologie (M2)"
+    },
+    {
+      "source": "Babak Afrassiabi",
+      "target": "Pages Magazine"
+    },
+    {
+      "source": "Dessin de caract\u00e8res : \u00e0 pleins renvers\u00e9s",
+      "target": "Marie-Christophe Lambert"
+    },
+    {
+      "source": "Admission Bachelor 1",
+      "target": "CAS 3"
+    },
+    {
+      "source": "St\u00e9phanie Vilayphiou",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Ateliers pluridisciplinaires : Art"
+    },
+    {
+      "source": "Programme d'\u00e9tudes d\u00e9taill\u00e9 du 2\u00e8me cycle - M1-M2",
+      "target": "Programmes d'\u00e9tudes - Grilles de cours"
+    },
+    {
+      "source": "Ecriture / cr\u00e9ation textuelle (B3)",
+      "target": "Outils techniques"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Cin\u00e9ma d\u2019animation (BA)"
+    },
+    {
+      "source": "Arts num\u00e9riques (BA)",
+      "target": "Marc Wathieu"
+    },
+    {
+      "source": "Gravure M\u00e9tal",
+      "target": "Le stage interne"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "\u00c0 propos"
+    },
+    {
+      "source": "Manon De Boer",
+      "target": "Videography"
+    },
+    {
+      "source": "Sculpture",
+      "target": "Sculpture (BA)"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Bernadette Kluyskens"
+    },
+    {
+      "source": "Alain Fran\u00e7ois",
+      "target": "Histoire et actualit\u00e9 des m\u00e9dias / th\u00e9orie de la communication (B3)"
+    },
+    {
+      "source": "Joanna Lorho",
+      "target": "Narration - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Le doctorat \u00e0 l'erg"
+    },
+    {
+      "source": "Admission Bachelor 1",
+      "target": "CAS 1"
+    },
+    {
+      "source": "Outils techniques",
+      "target": "Techniques fondamentales, dessin (B1)"
+    },
+    {
+      "source": "Erg, what is it ?",
+      "target": "Multidisciplinary Workshops - MA"
+    },
+    {
+      "source": "New Poster Cult",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Digital arts / Coding",
+      "target": "Orientations at erg"
+    },
+    {
+      "source": "Renaud Huberlant",
+      "target": "Typographie (MA)"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Cin\u00e9ma d\u2019animation (BA)",
+      "target": "Nicolas Marcon"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (BA)",
+      "target": "Media - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Communication visuelle et graphique",
+      "target": "Communication visuelle et graphique (MA)"
+    },
+    {
+      "source": "De l\u2019oeuvre \u00e0 l\u2019imprim\u00e9",
+      "target": "Nicolas Storck"
+    },
+    {
+      "source": "Manuela Dechamps Otamendi",
+      "target": "Typographie (MA)"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Dessin (BA)"
+    },
+    {
+      "source": "...gira nello spazio senza fine",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Manuela Dechamps Otamendi"
+    },
+    {
+      "source": "...gira nello spazio senza fine",
+      "target": "Antoine Meyer"
+    },
+    {
+      "source": "English",
+      "target": "Orientations at erg"
+    },
+    {
+      "source": "O\u00f9? Quoi? Comment? Qui?",
+      "target": "Rapports de Conseil de gestion p\u00e9dagogique"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B2)",
+      "target": "Peinture (BA)"
+    },
+    {
+      "source": "Dessin / le fait main num\u00e9rique",
+      "target": "Giovanni Guarini"
+    },
+    {
+      "source": "Anne Valkenborgh",
+      "target": "Workshop gravure, Creux et relief / mixte technique / aquatinte morsure directe et xylogravure"
+    },
+    {
+      "source": "Creux et relief / mixte technique / aquatinte morsure directe et xylogravure",
+      "target": "Gravure M\u00e9tal"
+    },
+    {
+      "source": "Hashich, in.",
+      "target": "Sculpture (MA)"
+    },
+    {
+      "source": "Dani\u00e8le Leclercq",
+      "target": "Initiation \u00e0 la s\u00e9rigraphie"
+    },
+    {
+      "source": "Admission 2019-2020",
+      "target": "Devenir \u00e9tudiant-e \u00e0 l'erg"
+    },
+    {
+      "source": "Marcel Berlanger",
+      "target": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)"
+    },
+    {
+      "source": "Formats, canons, gaufriers, en marge super max-width!",
+      "target": "Graphic design- Experimental and critical practices"
+    },
+    {
+      "source": "Peggy Pierrot",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)",
+      "target": "Sven Augustijnen"
+    },
+    {
+      "source": "Man\u0153uvres s\u00e9rigraphiques",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Giovanni Guarini",
+      "target": "Graphisme (BA)"
+    },
+    {
+      "source": "Joachim Lacrosse",
+      "target": "Philosophie g\u00e9n\u00e9rale (B1)"
+    },
+    {
+      "source": "Joanna Lorho",
+      "target": "Workshop 12h Bande dessin\u00e9e"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Guy Wouet\u00e9"
+    },
+    {
+      "source": "Dani\u00e8le Leclercq",
+      "target": "S\u00e9rigraphie"
+    },
+    {
+      "source": "Formats, canons, gaufriers, en marge super max-width!",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "La couleur tomb\u00e9e du ciel",
+      "target": "Winter School"
+    },
+    {
+      "source": "Brigitte Ledune",
+      "target": "Suivi de m\u00e9moire"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Je t\u2019aime, moi non plus (Six le\u00e7ons sur l\u2019image et le texte)"
+    },
+    {
+      "source": "Pierre-Philippe Duch\u00e2telet",
+      "target": "Renaud Huberlant"
+    },
+    {
+      "source": "Orientations at erg",
+      "target": "Videography"
+    },
+    {
+      "source": "Caroline Van Damme",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Christophe Van Rossom",
+      "target": "Litt\u00e9rature g\u00e9n\u00e9rale (B1)"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "\u00c9tude des artefacts (M1-M2)"
+    },
+    {
+      "source": "Les lieux",
+      "target": "Ustensiles"
+    },
+    {
+      "source": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)",
+      "target": "S\u00e9minaire"
+    },
+    {
+      "source": "Theoretical courses",
+      "target": "\u00c9tude des artefacts (M1-M2)"
+    },
+    {
+      "source": "Annick Lantenois",
+      "target": "Design et Politique du multiple (MA)"
+    },
+    {
+      "source": "Christophe Van Rossom",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Loraine Furter"
+    },
+    {
+      "source": "Dominique Goblet",
+      "target": "Illustration - Comics"
+    },
+    {
+      "source": "M\u00e9thodologie / m\u00e9moire",
+      "target": "Rapha\u00ebl Pirenne"
+    },
+    {
+      "source": "Marc Wathieu",
+      "target": "PrestiDIGITAL, Pratiques magiques et occultures contemporaines autour de Arduino."
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Wendy Van Wynsberghe"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Masters \u00e0 finalit\u00e9 approfondie"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Laurent Baudoux"
+    },
+    {
+      "source": "G\u00e9rard Goffaux",
+      "target": "Technical courses"
+    },
+    {
+      "source": "Nicolas Prignot",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Alexander Schellow",
+      "target": "Labobine - Salle Super 8"
+    },
+    {
+      "source": "Cin\u00e9ma-vid\u00e9o (B3)",
+      "target": "Xavier Garc\u00eda Bard\u00f3n"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Ludivine Loiseau"
+    },
+    {
+      "source": "Installation/Performance",
+      "target": "Installation/Performance (MA)"
+    },
+    {
+      "source": "Marie-Christophe Lambert",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Ludivine Loiseau",
+      "target": "Theoretical courses"
+    },
+    {
+      "source": "Fabrizio Terranova",
+      "target": "R\u00e9cits et exp\u00e9rimentation - Narration sp\u00e9culative (MA)"
+    },
+    {
+      "source": "Giampiero Caiti",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "Nasrin Tabatabai",
+      "target": "Workshop Pages Magazine"
+    },
+    {
+      "source": "Marie-Christophe Lambert",
+      "target": "Media - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+      "target": "Media - Atelier pluridisciplinaire (B1)"
+    },
+    {
+      "source": "Theoretical courses",
+      "target": "Toma Muteba Lutumbue"
+    },
+    {
+      "source": "Fabrizio Terranova",
+      "target": "Suivi de m\u00e9moire"
+    },
+    {
+      "source": "Graphisme (BA)",
+      "target": "Isabelle Jossa"
+    },
+    {
+      "source": "PrestiDIGITAL, Pratiques magiques et occultures contemporaines autour de Arduino.",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Fa, fe, fo, fr, fs, ft, fb, fh, fu, fy",
+      "target": "Ludivine Loiseau"
+    },
+    {
+      "source": "BAC ERG CVG",
+      "target": "Moussa Cheniguel"
+    },
+    {
+      "source": "BAC ERG CVG",
+      "target": "Premi\u00e8res recherches et avant-projets"
+    },
+    {
+      "source": "Bachelors",
+      "target": "Bande dessin\u00e9e (BA)"
+    },
+    {
+      "source": "Histoire et actualit\u00e9 des arts / XIXe et XXe si\u00e8cle (B2)",
+      "target": "Monique Renault"
+    },
+    {
+      "source": "Actualit\u00e9s culturelles / actualit\u00e9 et lectures de l\u2019art (B3)",
+      "target": "Elke de Rijcke"
+    },
+    {
+      "source": "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale (M2)",
+      "target": "Guy Wouet\u00e9"
+    },
+    {
+      "source": "Design et Politique du multiple (MA)",
+      "target": "Renaud Huberlant"
+    },
+    {
+      "source": "Dessin modulaire",
+      "target": "Visual and Graphic Communication"
+    },
+    {
+      "source": "G\u00e9rard Goffaux",
+      "target": "Techniques fondamentales, dessin (B2)"
+    },
+    {
+      "source": "Installation - Performance",
+      "target": "Jo\u00eblle Tuerlinckx"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Pratiques Num\u00e9riques B2-B3"
+    },
+    {
+      "source": "The (s)Peaking Spots",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Christian Staquet",
+      "target": "Illustration - Comics"
+    },
+    {
+      "source": "Gender fluid : Bye bye binary \u2014 des imaginaires possibles autour d\u2019une typographie inclusive",
+      "target": "Loraine Furter"
+    },
+    {
+      "source": "Christian Staquet",
+      "target": "Dessin / atelier"
+    },
+    {
+      "source": "Florence Delhaye",
+      "target": "S\u00e9rigraphie"
+    },
+    {
+      "source": "Ateliers pluridisciplinaires (BA)",
+      "target": "Media - Atelier pluridisciplinaire (B2)"
+    },
+    {
+      "source": "Bienvenue \u00e0 l\u2019erg",
+      "target": "Curlybraces"
+    },
+    {
+      "source": "Atelier Reliure avec Clara Gevaert et Marie-Christophe Lambert",
+      "target": "Winter School"
+    },
+    {
+      "source": "Archives s\u00e9minaires",
+      "target": "Le s\u00e9minaire de l'erg"
+    },
+    {
+      "source": "Alexia de Visscher",
+      "target": "Media - Atelier pluridisciplinaire (B3)"
+    },
+    {
+      "source": "Alexis Zimmer",
+      "target": "S\u00e9minaire Politique et exp\u00e9rimentation graphiques"
+    },
+    {
+      "source": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+      "target": "S\u00e9minaire Politique et exp\u00e9rimentation graphiques"
+    },
+    {
+      "source": "COLORING ERG BOOK",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "20.000 images sous les yeux",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Magali Michaux",
+      "target": "Sciences humaines et sociales / sciences \u00e9conomiques, politiques et sociales (B1)"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B3)",
+      "target": "Bernadette Kluyskens"
+    },
+    {
+      "source": "Interfaces \u00e9lectroniques",
+      "target": "Typography"
+    },
+    {
+      "source": "Graphic design- Experimental and critical practices",
+      "target": "Interfaces \u00e9lectroniques"
+    },
+    {
+      "source": "Installation/Performance (MA)",
+      "target": "Jo\u00eblle Tuerlinckx"
+    },
+    {
+      "source": "Interfaces \u00e9lectroniques",
+      "target": "Typographie (BA)"
+    },
+    {
+      "source": "Loraine Furter",
+      "target": "Teaching To Transgress"
+    },
+    {
+      "source": "Genevi\u00e8ve Casterman",
+      "target": "Pratique du carnet : texte et image"
+    },
+    {
+      "source": "Manoeuvres s\u00e9rigraphiques",
+      "target": "Marie Feyereisen"
+    },
+    {
+      "source": "Isabelle Jossa",
+      "target": "\u00c0 propos"
+    },
+    {
+      "source": "Genevi\u00e8ve Casterman",
+      "target": "Illustration - Comics"
+    },
+    {
+      "source": "Abbaye de Forest",
+      "target": "BAC ERG CVG"
+    },
+    {
+      "source": "Communication visuelle et graphique (MA)",
+      "target": "Loraine Furter"
+    },
+    {
+      "source": "Art - Atelier pluridisciplinaire (B1)",
+      "target": "Ateliers pluridisciplinaires (BA)"
+    },
+    {
+      "source": "Alexis Zimmer",
+      "target": "Design et Politique du multiple (MA)"
+    },
+    {
+      "source": "Le stage interne",
+      "target": "Photographie (MA)"
+    },
+    {
+      "source": "Erg-succursale",
+      "target": "Workshops 25-30 mars 2019"
+    },
+    {
+      "source": "Geste sp\u00e9culatif",
+      "target": "R\u00e9cits et exp\u00e9rimentation - Narration sp\u00e9culative (MA)"
+    },
+    {
+      "source": "Orientations at erg",
+      "target": "Photography"
+    },
+    {
+      "source": "Renaud Huberlant",
+      "target": "Typography"
+    },
+    {
+      "source": "Florence Delhaye",
+      "target": "Manoeuvres s\u00e9rigraphiques"
+    },
+    {
+      "source": "Caroline Van Damme",
+      "target": "Philosophie esth\u00e9tique (B3)"
+    },
+    {
+      "source": "Formats, canons, gaufriers, en marge super max-width!",
+      "target": "Ludivine Loiseau"
+    },
+    {
+      "source": "Erg-succursale",
+      "target": "Jo\u00eblle Tuerlinckx"
+    },
+    {
+      "source": "Typography",
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+    "Erasmus+": "International",
+    "Cours g\u00e9n\u00e9ral : Philosophie / G\u00e9n\u00e9rale": "Cours g\u00e9n\u00e9ral : Philosophie g\u00e9n\u00e9rale",
+    "Techniques fondamentales, dessin": "Techniques fondamentales, dessin (B1)",
+    "S\u00e9minaire PEG : Visual Culture": "S\u00e9minaire Politique du multiple",
+    "Philosophie contemporaine": "Philosophie contemporaine (M1)",
+    "Th\u00e9orie et pratique des nouvelles technologies / Cultures num\u00e9riques - une bo\u00eete \u00e0 outils": "Cours g\u00e9n\u00e9ral : Th\u00e9orie et pratique des nouvelles technologies / Cultures num\u00e9riques - une bo\u00eete \u00e0 outils",
+    "Espace Public Num\u00e9rique": "The Networked Social",
+    "\u00c9criture": "\u00c9criture mat\u00e9riau",
+    "Pour les \u00e9tudiant-e-s": "Intranet",
+    "Cours g\u00e9n\u00e9ral \u00e0 choix : Histoire et actualit\u00e9 des arts / XIXe et XXe si\u00e8cle": "Histoire et actualit\u00e9 des arts / XIXe et XXe si\u00e8cle (B2)",
+    "S\u00e9miologie/Image - Master 1": "S\u00e9miologie (M1)",
+    "Admission": "Admission 2019-2020",
+    "Communication visuelle et graphique (BA)": "Communication visuelle et graphique \u2192 Pratiques num\u00e9riques (BA)",
+    "Multiples agencements du politique (TALOS)": "Multiples agencements du politique",
+    "S\u00e9minaire Faire Porte F\u00e9conde / pratiques artistiques - critique sociale": "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale",
+    "Galerie de l'erg": "Erg Galerie",
+    "R\u00e9cits et exp\u00e9rimentation (MA)": "R\u00e9cits et exp\u00e9rimentation - Narration sp\u00e9culative (MA)",
+    "Suivi du m\u00e9moire": "Suivi de m\u00e9moire",
+    "Cours g\u00e9n\u00e9ral : Histoire et actualit\u00e9 des arts / Image": "Histoire et actualit\u00e9 des arts / image (B2)",
+    "R\u00e9cits et exp\u00e9rimentation\u2192 narration speculative": "R\u00e9cits et exp\u00e9rimentation\u2192 narration speculative (MA)",
+    "Parler \u00e0 la machine, terminal": "Parler \u00e0 la machine",
+    "Cours g\u00e9n\u00e9ral : Litt\u00e9rature / litt\u00e9rature contemporaine": "Cours g\u00e9n\u00e9ral : Litt\u00e9rature contemporaine",
+    "Cin\u00e9ma d\u2019animation BA": "Cin\u00e9ma d\u2019animation (BA)",
+    "Books review (M1-M2)": "Etude des art\u00e9facts (M1-M2)",
+    "Graphic Practices and Scientific Complexity": "Artistic Practices and Scientific Complexity",
+    "Cours g\u00e9n\u00e9ral : S\u00e9miologie / image": "S\u00e9miologie / image (B1)",
+    "Raya Lindberg": "Raya Baudinet-Lindberg",
+    "Pratique de l\u2019art - outils critiques\u2192 art et contextes simultan\u00e9s (MA)": "Pratique de l\u2019art - outils critiques (MA)",
+    "Cours g\u00e9n\u00e9ral \u00e0 choix : Histoire et actualit\u00e9 des m\u00e9dias / th\u00e9orie de la communication Bac 2": "Histoire et actualit\u00e9 des m\u00e9dias / th\u00e9orie de la communication (B2)",
+    "Emmanuel Blondiau": "Manu Blondiau",
+    "Statut de l'image": "Statuts de l\u2019image / Tourments et d\u00e9tournements",
+    "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires": "Cours sp\u00e9cifiques li\u00e9s aux ateliers pluridisciplinaires (MA)",
+    "Techniques fondamentales : dessin": "Techniques fondamentales : dessin (B2)",
+    "Cours g\u00e9n\u00e9ral \u00e0 choix : Sciences humaines et sociales / anthropologie": "Sciences humaines et sociales / anthropologie (B1)",
+    "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale (M1-M2)": "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale (M2)",
+    "Techniques fondamentales : dessin (B2)": "Techniques fondamentales, dessin (B2)",
+    "Le conseil de gestion p\u00e9dagogique": "Cat\u00e9gorie:Conseil de gestion p\u00e9dagogique",
+    "Cours g\u00e9n\u00e9ral : Histoire et actualit\u00e9 des arts / arts non-europ\u00e9ens": "Histoire et actualit\u00e9 des arts / arts non-europ\u00e9ens (B3)",
+    "Accueil": "Bienvenue \u00e0 l\u2019erg",
+    "Cours g\u00e9n\u00e9ral : Histoire et actualit\u00e9 des arts / Arts non-europ\u00e9ens": "Cours g\u00e9n\u00e9ral : Histoire et actualit\u00e9 des arts / arts non-europ\u00e9ens",
+    "Cours g\u00e9n\u00e9ral : s\u00e9miologie / image": "Cours g\u00e9n\u00e9ral : S\u00e9miologie / image",
+    "Cours g\u00e9n\u00e9ral \u00e0 choix : Histoire et actualit\u00e9 des arts / m\u00e9dia": "Histoire et actualit\u00e9 des arts / m\u00e9dia (B1)",
+    "Workshop avec F\u00e9licit\u00e9 Landrivon": "Workshop en brigade avec F\u00e9licit\u00e9 Landrivon",
+    "\u00c9cole doctorale 20": "Le doctorat \u00e0 l'erg",
+    "Marc Watthieu": "Marc Wathieu",
+    "Cin\u00e9ma-vid\u00e9o": "Cin\u00e9ma-vid\u00e9o Bac 2",
+    "Metapost": "Fa, fe, fo, fr, fs, ft, fb, fh, fu, fy",
+    "L' \u00e9quipe administrative": "Les \u00e9quipes",
+    "PrestiDIGITAL": "PrestiDIGITAL, Pratiques magiques et occultures contemporaines autour de Arduino.",
+    "Notions de l\u00e9gislation et de droit": "Droit de la Cr\u00e9ation et de l'Information",
+    "Xavier Garcia Bardon": "Xavier Garc\u00eda Bard\u00f3n",
+    "Bande dessin\u00e9e BA": "Bande dessin\u00e9e (BA)",
+    "Theoretical courses in Bachelors": "Theoretical courses",
+    "Harrisson / Jo\u00ebl Vermot": "Harrisson",
+    "AP : DESIGN \u00c9DITORIAL / ERG.EDIT : POLITIQUE DU MULTIPLE": "AP : POLITIQUE DU MULTIPLE",
+    "Pluridisciplinary workshops": "English",
+    "Cours g\u00e9n\u00e9ral : Histoire et actualit\u00e9 des arts / de la Renaissance \u00e0 la fin du 19e si\u00e8cle": "Histoire et actualit\u00e9 des arts / de la Renaissance \u00e0 la fin du 19e si\u00e8cle",
+    "Th\u00e9orie de la communication (MA)": "Th\u00e9orie de la communication (M1-M2)",
+    "L'\u00e9quipe administrative": "Cat\u00e9gorie:\u00c9quipe administrative",
+    "Organigramme": "Organisation",
+    "Cours g\u00e9n\u00e9ral : Litt\u00e9rature / G\u00e9n\u00e9rale": "Cours g\u00e9n\u00e9ral : Litt\u00e9rature g\u00e9n\u00e9rale",
+    "Ecriture et cr\u00e9ation textuelle": "Ecriture / cr\u00e9ation textuelle (B1)",
+    "Cours g\u00e9n\u00e9ral \u00e0 choix : Histoire et actualit\u00e9 des arts / m\u00e9dias": "Histoire et actualit\u00e9 des arts / m\u00e9dias (B2)",
+    "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale": "Faire Porte F\u00e9conde / pratiques artistiques - critique sociale (M1-M2)",
+    "Politique et exp\u00e9rimentation graphique\u2192 pratiques graphiques et complexit\u00e9 scientifique (MA)": "Pratiques graphiques et complexit\u00e9 scientifique (MA)",
+    "Etude des art\u00e9facts (M1-M2)": "\u00c9tude des artefacts (M1-M2)",
+    "Pratique de l\u2019art - outils critiques, arts et contexte simultan\u00e9s (MA)": "Pratique de l\u2019art : outils critiques - arts et contexte simultan\u00e9s (MA)",
+    "Jo\u00ebl Vermot": "Harrisson / Jo\u00ebl Vermot",
+    "Cours g\u00e9n\u00e9ral : Th\u00e9orie et pratique des nouvelles technologies / Cultures num\u00e9riques - une bo\u00eete \u00e0 outils": "Th\u00e9orie et pratique des nouvelles technologies / Cultures num\u00e9riques - une bo\u00eete \u00e0 outils (B1)",
+    "Politique et exp\u00e9rimentation graphique\u2192 pratiques graphiques et complexit\u00e9 scientifique": "Politique et exp\u00e9rimentation graphique\u2192 pratiques graphiques et complexit\u00e9 scientifique (MA)",
+    "In\u00e8s Rabadan": "In\u00e8s Rabad\u00e1n"
+  }
+}
diff --git a/src/forcenet.js b/src/forcenet.js
new file mode 100644
index 0000000..4c2c0dc
--- /dev/null
+++ b/src/forcenet.js
@@ -0,0 +1,221 @@
+import { event, select, selectAll} from 'd3-selection';
+import { values, set, map } from 'd3-collection';
+import { drag } from 'd3-drag';
+import { zoom } from 'd3-zoom';
+import { forceSimulation, forceLink, forceManyBody, forceCenter, forceX, forceY, forceRadial } from 'd3-force';
+// import { Wiki, Page } from './wiki.js';
+import EventEmitter from 'eventemitter3';
+// import { json } from 'd3-fetch';
+
+export class ForceNet {
+
+    constructor (symbols) {
+        var width = 600,
+            height = 600;
+
+        this.symbols = symbols || {};
+        this.events = new EventEmitter();
+        this.active_page = null;
+        // this.nodes = {};
+        this.simulation = forceSimulation()
+            .velocityDecay(0.1)
+            .force("link", forceLink().id(d => d.title))
+            .force("charge", forceManyBody())
+            .force("radial", forceRadial(180, width/2, height/2));
+            // .force("center", forceCenter(width / 2, height / 2));
+        this.svg = null;
+        // this.historylinks = {};
+    }
+
+    on (message, callback, context) {
+        this.events.on(message, callback, context);
+    }
+
+    init_svg (svg) {
+        this.svg = select(svg || "svg");
+        this.zoom = zoom()
+            .scaleExtent([1 / 16, 4])
+            .on("zoom", () => {
+              this.content.attr("transform", event.transform);
+              // console.log("transform", event.transform, this.content.attr("transform"));
+            });
+        this.rect = this.svg.append("rect")
+            .attr("width", 1000)
+            .attr("height", 1000)
+            .style("fill", "none")
+            .style("pointer-events", "all")
+            .call(this.zoom);
+        this.content = this.svg.append("g")
+            .attr("id", "content"),
+        this.linksg = this.content.append("g")
+            .attr("class", "links");
+        this.nodesg = this.content.append("g")
+            .attr("class", "nodes");
+    }
+
+    dragstarted (d) {
+        if (!event.active) this.simulation.alphaTarget(0.3).restart();
+        d.fx = d.x;
+        d.fy = d.y;
+    }
+
+    dragged (d) {
+        d.fx = event.x;
+        d.fy = event.y;
+    }
+
+    dragended(d) {
+        if (!event.active) this.simulation.alphaTarget(0);
+        d.fx = null;
+        d.fy = null;
+    }
+
+    link_key (a, b) {
+        return (a < b) ? ("link_"+a+"_"+b) : ("link_"+b+"_"+a);
+    }
+
+    get_symbol (d, def) {
+        for (var i=0, l=d.cats.length; i<l; i++) {
+            if (this.symbols[d.cats[i]]) {
+                return this.symbols[d.cats[i]];
+            }
+        }
+        return this.symbols.default || def;
+    }
+
+    update_graph (graph) {
+        console.log("UPDATE GRAPH", graph.nodes.length, graph.links.length);
+        var link = this.linksg.selectAll("line")
+                .data(graph.links, d => { return this.link_key(d.source.title, d.target.title) });
+        var link_enter = link.enter()
+            .append("line");
+
+        link.exit().each(d => {
+            d.source.linked = false;
+            d.target.linked = false;
+        }).remove();
+        
+        link_enter.merge(link).each(d => {
+                d.source.linked = true;
+                d.target.linked = true;
+            });
+
+        var node = this.nodesg
+            .selectAll("g.page")
+            .data(graph.nodes, function (d) { return d.title });
+
+        var that = this;
+        var node_enter = node.enter().append("g")
+            .attr("class", "page")
+            // .attr("class", d=>"page "+this.wiki.get_ns_classname(d.ns))
+            .on("click", function(d) {
+                that.events.emit("nodeclick", d, this);
+                // this.set_active_node(d.title);
+            })
+            .on("mouseover", function (d) {
+                // console.log("mouseover", this);
+                select(this).classed("mouse", true);
+            })
+            .on("mouseout", function (d) {
+                // console.log("mouseout", this);
+                select(this).classed("mouse", false);
+            })
+            .call(drag()
+                .on("start", this.dragstarted.bind(this))
+                .on("drag", this.dragged.bind(this))
+                .on("end", this.dragended.bind(this)));
+
+        node_enter.append("use")
+            .attr("xlink:href", d => this.get_symbol(d, "default"))
+            .attr("class", "testcolor");
+            // {
+            //     for (var i=0, l=d.cats.length; i<l; i++) {
+            //         if (this.symbols[d.cats[i]]) {
+            //             return this.symbols[d.cats[i]];
+            //         }
+            //     }
+            //     return this.symbols.default || "default";
+            // });
+
+        // node_enter.append("circle")
+        //     .attr("r", 6);
+
+        node_enter.append("text")
+            .text(d => d.title)
+            .attr("x", 10);
+
+        //node_enter.append("title")
+        //   .text(function(d) { return d.title; });
+
+        node = node_enter.merge(node);
+        link = link_enter.merge(link);
+
+        node.classed("active", d=>d.active);
+
+        this.simulation
+            .nodes(graph.nodes)
+            .on("tick", ticked);
+
+        this.simulation.force("link")
+            .links(graph.links);
+
+        this.simulation.force("radial").radius(d => d.linked ? null : 200);
+
+        function ticked() {
+            link
+                .attr("x1", function(d) { return d.source.x; })
+                .attr("y1", function(d) { return d.source.y; })
+                .attr("x2", function(d) { return d.target.x; })
+                .attr("y2", function(d) { return d.target.y; });
+
+            // node
+            //     .attr("cx", function(d) { return d.x; })
+            //     .attr("cy", function(d) { return d.y; });
+            node
+                .attr("transform", d => `translate(${d.x},${d.y})`);
+        }
+        this.update_nodes();
+        this.update_forces();
+        // this.simulation.alphaTarget(0.3).restart();
+    }
+
+    update_nodes () {
+        var nodes = this.nodesg.selectAll("g.page");
+        console.log("update_nodes", nodes.size());
+        nodes.classed("active", d=>d.active);
+        nodes.classed("active2", d=>d.active2);
+        nodes.classed("highlight", d=>d.highlight);
+        nodes.sort((a, b) => {
+            // console.log("sort", a, b);
+            var x = a.active ? 10 : (a.active2 ? 5 : 0),
+                y = b.active ? 10 : (b.active2 ? 5 : 0);
+            return x - y; 
+        });
+        var links = this.linksg.selectAll("line");
+        links.classed("active2", d=>d.active2);        
+        links.classed("history", d=>d.type == "history");        
+        links.sort((a, b) => {
+            // console.log("sort", a, b);
+            var x = a.active2 ? 10 : (a.history ? 5 : 0),
+                y = b.active2 ? 10 : (b.history ? 5 : 0);
+            return x - y; 
+        });
+    }
+
+    update_forces () {
+        var force = this.simulation.force("link");
+        console.log("update_forces:force", force);
+        this.simulation.force("link").strength(d => {
+            if (d.source.active || d.target.active) {
+                return 1;
+            } else {
+                // same as d3.force's defaultStrength
+                return 0.5 * (1 / Math.min(d.source.count, d.target.count)); 
+            }
+        });
+        this.simulation.alphaTarget(0.3).restart();
+    }
+
+
+}
+
diff --git a/src/test.js b/src/test.js
new file mode 100644
index 0000000..52f7a98
--- /dev/null
+++ b/src/test.js
@@ -0,0 +1,3 @@
+export function test () {
+    alert("testing import");
+}
\ No newline at end of file
diff --git a/src/wiki.js b/src/wiki.js
new file mode 100644
index 0000000..8212438
--- /dev/null
+++ b/src/wiki.js
@@ -0,0 +1,154 @@
+
+import fetchJsonp from 'fetch-jsonp';
+import { map } from 'd3-collection';
+
+var NS = {
+    main: 0,
+    discussion: 1,
+    template: 10,
+    category: 14,
+    news: 3106,
+    web: 3116
+}
+
+export class Wiki {
+    constructor (apiurl) {
+        this.apiurl = apiurl;
+        this.pages_by_title = {};
+        this.ns_names = {};
+        for (var key in NS) {
+            var nsid = NS[key];
+            this.ns_names[nsid] = key;
+        }
+    }
+    get_page_by_title (title) {
+        var p = this.pages_by_title[title];
+        if (p) {
+            return p;
+        } else {
+            p = new Page(this, {title: title, ns: 0});
+            this.pages_by_title[title] = p;
+            return p; 
+        }
+    }
+    page_for_object (n, merge_data) {
+        if (merge_data === undefined) { merge_data = true; }
+        var title = n.title,
+            p = this.pages_by_title[title];
+        if (p) {
+            if (merge_data) { p.merge_data(n); }
+            return p;
+        } else {
+            p = new Page(this, n);
+            this.pages_by_title[title] = p;
+            return p; 
+        }
+    }
+    get_ns_classname (nsid) {
+        // console.log("get_ns_classname", nsid, this.ns_names[nsid]);
+        var ret = this.ns_names[nsid];
+        console.log("classname", ret);
+        if (ret === undefined) { console.log("warning classname undefined for ns", nsid); }
+        return ret;
+    }
+    union (p1, p2) {
+        var union = map(p1, d=>d.title);
+        for (var i=0, l=p2.length; i<l; i++) {
+            var x = p2[i];
+            union.set(x.title, x);
+        }
+        return union.values();
+    }
+}
+
+export class Page {
+    constructor (wiki, node) {
+        this.wiki = wiki;
+        this.merge_data(node);
+    }
+    url () {
+        // return this.wiki.apiurl.replace("api.php", "index.php")+"/"+encodeURIComponent(this.title);
+        return this.wiki.apiurl.replace("api.php", "index.php")+"/"+encodeURIComponent(this.title);
+    }
+    merge_data (node) {
+        for (var key in node) {
+            if (node.hasOwnProperty(key)) {
+                this[key] = node[key];
+            }
+        }        
+    }
+
+    // api.php?action=query&prop=categories&titles=Albert%20Einstein
+    async get_prop (pname, prefix) {
+        var ret = [];
+        var url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop="+pname+"&titles="+encodeURIComponent(this.title);
+        while (true) {
+            var data = await fetchJsonp(url);
+            var json = await data.json();
+            // console.log("BACKLINKS.RAW", json);
+            // filter REDIRECTS + Discussion pages (ns==1)
+            if (json.query.pages[0]) {
+                var p = json.query.pages[0];
+                // extract any missing page info
+                if (p.ns && !this.ns) { this.ns = p.ns; }
+                if (p.pageid && !this.pageid) { this.pageid = p.pageid; }
+            }
+            if (json.query.pages[0][pname]) {
+                ret.push.apply(ret, json.query.pages[0][pname]);
+            }
+            if (!json.continue) { break; }
+            url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop="+pname+"&"+prefix+"continue="+json.continue[prefix+"continue"]+"&titles="+encodeURIComponent(this.title);
+        }
+        ret = ret.map(x => this.wiki.page_for_object(x));
+        // console.log("get_backlinks", ret);
+        console.log("get_prop", pname, prefix, ret);
+        return ret;
+    }
+    async get_links () {
+        return await this.get_prop("links", "pl");
+        // // http://localhost/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+        // var ret = [];
+        // var url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop=links&titles="+encodeURIComponent(this.title);
+        // while (true) {
+        //     var data = await fetchJsonp(url);
+        //     var json = await data.json();
+        //     // console.log("JSON", json);
+        //     if (json.query.pages[0]) {
+        //         var p = json.query.pages[0];
+        //         // extract any missing page info
+        //         if (p.ns && !this.ns) { this.ns = p.ns; }
+        //         if (p.pageid && !this.pageid) { this.pageid = p.pageid; }
+        //     }
+        //     if (json.query.pages[0].links) {
+        //         ret.push.apply(ret, json.query.pages[0].links);
+        //     }
+        //     if (!json.continue) { break; }
+        //     url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&prop=links&plcontinue="+json.continue.plcontinue+"&titles="+encodeURIComponent(this.title);
+        // }
+        // ret = ret.map(x => this.wiki.page_for_object(x));
+        // // map these to page objects
+        // return ret;
+    }
+    async get_linkshere () {
+        return await this.get_prop("linkshere", "lh");
+    }
+    async get_list () {        
+        // http://localhost/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+        var ret = [];
+        var url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&list=backlinks&bltitle="+encodeURIComponent(this.title);
+        while (true) {
+            var data = await fetchJsonp(url);
+            var json = await data.json();
+            // console.log("BACKLINKS.RAW", json);
+            // filter REDIRECTS + Discussion pages (ns==1)
+            var backlinks = json.query.backlinks;
+            // backlink = backlinks.filter(x => (!x.redirect && x.ns != 1);
+            ret.push.apply(ret, backlinks);
+            if (!json.continue) { break; }
+            url = this.wiki.apiurl+"?action=query&format=json&formatversion=2&list=backlinks&blcontinue="+json.continue.blcontinue+"&bltitle="+encodeURIComponent(this.title);
+        }
+        ret = ret.map(x => this.wiki.page_for_object(x));
+        // console.log("get_backlinks", ret);
+        return ret;
+    }
+}
diff --git a/src/wikimap.js b/src/wikimap.js
new file mode 100644
index 0000000..3246428
--- /dev/null
+++ b/src/wikimap.js
@@ -0,0 +1,210 @@
+import { event, select, selectAll} from 'd3-selection';
+import { values, set, map } from 'd3-collection';
+import { drag } from 'd3-drag';
+import { forceSimulation, forceLink, forceManyBody, forceCenter, forceX, forceY, forceRadial } from 'd3-force';
+import { Wiki, Page } from './wiki.js';
+import EventEmitter from 'eventemitter3';
+
+export class Map {
+
+    constructor (apiurl) {
+        var width = 600,
+            height = 600;
+        this.wiki = new Wiki(apiurl);
+        this.events = new EventEmitter();
+        this.active_page = null;
+        // this.nodes = {};
+        this.simulation = forceSimulation()
+            .velocityDecay(0.1)
+            .force("link", forceLink().id(d => d.title))
+            .force("charge", forceManyBody())
+            .force("radial", forceRadial(180, width/2, height/2));
+            // .force("center", forceCenter(width / 2, height / 2));
+        this.svg = null;
+        this.historylinks = {};
+    }
+
+    on (message, callback, context) {
+        this.events.on(message, callback, context);
+    }
+
+    init_svg (svg) {
+        this.svg = select(svg || "svg");
+        this.linksg = this.svg.append("g")
+            .attr("class", "links");
+        this.nodesg = this.svg.append("g")
+            .attr("class", "nodes");
+    }
+
+    dragstarted (d) {
+        if (!event.active) this.simulation.alphaTarget(0.3).restart();
+        d.fx = d.x;
+        d.fy = d.y;
+    }
+
+    dragged (d) {
+        d.fx = event.x;
+        d.fy = event.y;
+    }
+
+    dragended(d) {
+        if (!event.active) this.simulation.alphaTarget(0);
+        d.fx = null;
+        d.fy = null;
+    }
+
+    update_graph (graph) {
+        // console.log("UPDATE GRAPH", graph.nodes.length, graph.links.length);
+        var that = this,
+            link = this.linksg.selectAll("line")
+                .data(graph.links, function (d) { return that.link_key(d.source.title, d.target.title) });
+        var link_enter = link.enter()
+            .append("line");
+
+        link.exit().each(d => {
+            d.source.linked = false;
+            d.target.linked = false;
+        }).remove();
+        
+        link_enter.merge(link).each(d => {
+                d.source.linked = true;
+                d.target.linked = true;
+            });
+
+        var node = this.nodesg
+            .selectAll("g.page")
+            .data(graph.nodes, function (d) { return d.title });
+
+        var node_enter = node.enter().append("g")
+            .attr("class", d=>"page "+this.wiki.get_ns_classname(d.ns))
+            .on("click", d => {
+                this.set_active_node(d.title);
+            })
+            .on("mouseover", function (d) {
+                // console.log("mouseover", this);
+                select(this).classed("mouse", true);
+            })
+            .on("mouseout", function (d) {
+                // console.log("mouseout", this);
+                select(this).classed("mouse", false);
+            })
+            .call(drag()
+                .on("start", this.dragstarted.bind(this))
+                .on("drag", this.dragged.bind(this))
+                .on("end", this.dragended.bind(this)));
+
+        node_enter.append("circle")
+            .attr("r", 6);
+
+        node_enter.append("text")
+            .text(d => d.title)
+            .attr("x", 10);
+
+        //node_enter.append("title")
+        //   .text(function(d) { return d.title; });
+
+        node = node_enter.merge(node);
+        link = link_enter.merge(link);
+
+        node.classed("active", d=>d.active);
+
+        this.simulation
+            .nodes(graph.nodes)
+            .on("tick", ticked);
+
+        this.simulation.force("link")
+            .links(graph.links);
+
+        this.simulation.force("radial").radius(d => d.linked ? null : 200);
+
+        function ticked() {
+            link
+                .attr("x1", function(d) { return d.source.x; })
+                .attr("y1", function(d) { return d.source.y; })
+                .attr("x2", function(d) { return d.target.x; })
+                .attr("y2", function(d) { return d.target.y; });
+
+            // node
+            //     .attr("cx", function(d) { return d.x; })
+            //     .attr("cy", function(d) { return d.y; });
+            node
+                .attr("transform", d => `translate(${d.x},${d.y})`);
+        }
+        this.simulation.alphaTarget(0.3).restart();
+    }
+
+    link_key (a, b) {
+        return (a < b) ? ("link_"+a+"_"+b) : ("link_"+b+"_"+a);
+    }
+
+    walk (node, links) {
+        var links_seen = {};
+        // var node = this.ensure_node(nodename);
+        node.all_links.forEach(x => {
+            var link_key = this.link_key(node.title, x.title);
+            if (!links_seen[link_key]) {
+                links.push({source: node, target: x});
+                links_seen[link_key] = true;
+            }
+        })
+        return;
+    }
+
+    set_active_title (title) {
+        this.set_active_node(title);
+    }
+
+    async set_active_node (page) {
+        if (typeof(page) === "string") {
+            page = this.wiki.get_page_by_title(page)
+        }
+
+        if (page === this.active_page) {
+            // console.log("page is already the active page", page, this.active_page);
+            return;
+        }
+        if (this.active_page) {
+            this.active_page.active = false;
+            var lkey = this.link_key(this.active_page.title, page.title),
+                source = (this.active_page.title < page.title) ? this.active_page : page,
+                target = (this.active_page.title < page.title) ? page : this.active_page;
+            this.historylinks[lkey] = {source: source, target: target};
+        }
+        // n = this.ensure_node(pagetitle);
+        
+        this.active_page = page;
+        this.active_page.active = true;
+        this.load(this.active_page);
+        this.events.emit("page", this.active_page.title);
+    }
+
+    async load (page) {
+        console.log("loading", page.title);
+        var links = await page.get_links(),
+            backlinks = await page.get_linkshere(),
+            alllinks = this.wiki.union(links, backlinks);
+
+        page.all_links = alllinks;
+        // console.log("alllinks", alllinks);
+        var graph = {};
+
+        graph.nodes = values(this.wiki.pages_by_title);
+        graph.links = [];
+        this.walk(page, graph.links);
+        // activate historylinks
+        values(this.historylinks).forEach(x => {
+            graph.links.push(x);
+        })
+        // graph.links = titles.map(t => ({source: pagetitle, target: t}));
+        this.update_graph(graph);
+        // console.log("GOT DATA", titles);
+        // return titles;
+    }
+}
+
+
+
+// http://erg.activearchives.org/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+// http://erg.activearchives.org/w/api.php?action=query&prop=info&titles=Main%20Page
+// Bienvenue_à_l’erg
+// http://erg.activearchives.org/mw/index.php/Bienvenue_%C3%A0_l%E2%80%99erg
diff --git a/src/wikimapsimple.js b/src/wikimapsimple.js
new file mode 100644
index 0000000..c3f2d63
--- /dev/null
+++ b/src/wikimapsimple.js
@@ -0,0 +1,285 @@
+import { event, select, selectAll} from 'd3-selection';
+import { values, set, map } from 'd3-collection';
+import { drag } from 'd3-drag';
+import { zoom } from 'd3-zoom';
+import { forceSimulation, forceLink, forceManyBody, forceCenter, forceX, forceY, forceRadial } from 'd3-force';
+import { Wiki, Page } from './wiki.js';
+import EventEmitter from 'eventemitter3';
+import { json } from 'd3-fetch';
+
+import { ForceNet } from './forcenet.js';
+
+export class SimpleMap {
+
+    constructor (symbols) {
+        var width = 600,
+            height = 600;
+
+        this.events = new EventEmitter();
+        this.active_page = null;
+        // this.nodes = {};
+        this.symbols = symbols;
+        this.net = new ForceNet(symbols);
+        this.net.on("nodeclick", this.nodeclick.bind(this));
+        // this.simulation = forceSimulation()
+        //     .velocityDecay(0.1)
+        //     .force("link", forceLink().id(d => d.title))
+        //     .force("charge", forceManyBody())
+        //     .force("radial", forceRadial(180, width/2, height/2));
+        //     // .force("center", forceCenter(width / 2, height / 2));
+        this.svg = null;
+        this.historylinks = {};
+        this.links = null;
+        this.highlight_category = null;
+        this.show_history = false;
+    }
+
+    nodeclick (d, elt) {
+        console.log("nodeclick", d, elt, this);
+        this.set_active_node(d, elt);
+    }
+
+    init_svg (svg) {
+        this.net.init_svg(svg);
+    }
+
+    async load_json (source) {
+        var data = await json(source);
+
+        // index the nodes by title, init link-arity count
+        var index = {};
+        this.nodes_by_title = index;
+        for (let i=0, l=data.nodes.length; i<l; i++) {
+            let node = data.nodes[i];
+            node.count = 0;
+            index[node.title] = node;
+        }
+        this.nodes = data.nodes;
+
+        var use_links = [];
+        data.links = data.links.forEach(x => {
+            var source = index[x.source],
+                target = index[x.target];
+            if (source === undefined) {
+                console.log("bad source", x.source);
+                return;
+            }
+            if (target === undefined) {
+                console.log("bad target", x.target);
+                return;
+            }
+            source.count += 1;
+            target.count += 1;
+            use_links.push({ source: source, target: target });
+        });
+        data.links = use_links;
+        this.links = data.links;
+        // console.log("data", data);
+        // calculate the node sizes (link arity)
+        this.net.update_graph(data);
+    }
+
+    get_symbol_image_path (cname) {
+        var symbol = this.symbols[cname];
+        if (symbol) {
+            let hpos = symbol.indexOf("#"),
+                rest = symbol.substr(hpos+1);
+            rest = rest.replace(/'/g, '');
+            return "img/"+rest+".png";
+        }
+    }
+    async load_cats (src, elt) {
+        var data = await json(src);
+        
+        console.log("indexing categories by title");
+        var cats_by_title = {};
+        for (let i=0, l=data.length; i<l; i++) {
+            let cat = data[i];
+            cats_by_title[cat.title] = cat;
+            cat.pages = [];
+            cat.tcount = 0;
+        }
+        // index categories
+        console.log("indexing categories");
+        for (let key in this.nodes_by_title) {
+            let node = this.nodes_by_title[key];
+            // console.log("key", key, node.cats);
+            for (let j=0, jl=node.cats.length; j<jl; j++) {
+                let cname = node.cats[j],
+                    cat = cats_by_title[cname];
+                if (cat) {
+                    // increment the category + parents
+                    cat.pages.push(node);
+                    cat.tcount += 1
+                    while (cat.parent) {
+                        cat = cats_by_title[cat.parent];
+                        cat.tcount += 1;
+                    }
+                } else {
+                    console.log("Warning, unknown category", cname);
+                }
+            }
+        }
+        console.log("pre filter", data.length);
+        data = data.filter(d => d.tcount > 0)
+        console.log("post filter", data.length);
+        console.log("load_cats.data", data, elt);
+        var cat = select(elt)
+            .selectAll("div.cat")
+            .data(data)
+            .enter()
+            .append("div")
+            .attr("class", "cat");
+        cat.classed("icon", d => this.get_symbol_image_path(d.title));
+        cat.append("span").attr("class", "icon").filter(d=> this.get_symbol_image_path(d.title)).style("background-image", d => "url("+this.get_symbol_image_path(d.title)+")");
+        cat.append("span").attr("class", "spacing").html(d => {
+            var d = d.depth,
+                ret = "";
+            while(d) {
+                ret += "&nbsp;&nbsp;&nbsp;&nbsp;";
+                d-=1;
+            }
+            return ret;
+        });
+        cat.append("a").attr("class", "label").html(d => d.title).attr("href", "#").on("click", d => {
+            event.preventDefault();
+            this.category_click(d);
+        })
+        cat.append("span").attr("class", "count").html(d => d.tcount)
+    }
+
+    category_click (d) {
+        console.log("category click", d);
+        if (this.highlight_category) {
+            // cleanup old pages
+            this.highlight_category.pages.forEach(d => d.highlight = false);
+        }
+        this.highlight_category = d;
+        this.highlight_category.pages.forEach(d => d.highlight = true);
+        this.net.update_nodes();
+        // set highlight category...
+        // all nodes with this category get .highlight = true
+        // make a category index ?!
+    }
+
+    on (message, callback, context) {
+        this.events.on(message, callback, context);
+    }
+
+/* OLD STYLE with node.all_links
+    walk (node, links) {
+        var links_seen = {};
+        // var node = this.ensure_node(nodename);
+        node.all_links.forEach(x => {
+            var link_key = this.link_key(node.title, x.title);
+            if (!links_seen[link_key]) {
+                links.push({source: node, target: x});
+                links_seen[link_key] = true;
+            }
+        })
+        return;
+    }
+*/
+    set_active_title (title) {
+        this.set_active_node(title);
+    }
+
+    activate_linked_nodes (page, active) {
+        // deactivate linked links/nodes
+        for (let i=0, l=this.links.length; i<l; i++) {
+            let link = this.links[i];
+            if (link.source == page || link.target == page) {
+                link.active2 = active;
+                link.source.active2 = active;
+                link.target.active2 = active;
+            }
+        }        
+    }
+
+    async set_active_node (page) {
+        if (typeof(page) === "string") {
+             let pagename = page;
+             page = this.nodes_by_title[page];
+
+             if (!page) {
+                console.log("wikimap.set_active_node: page not found", pagename);
+             }
+        }
+
+        if (page === this.active_page) {
+            // console.log("page is already the active page", page, this.active_page);
+            return;
+        }
+        if (this.active_page) {
+            this.active_page.active = false;
+            // deactivate linked links/nodes
+            this.activate_linked_nodes(this.active_page, false);
+            // ENSURE HISTORY LINK TO PREVIOUS NODE AND CURRENT
+            var lkey = this.net.link_key(this.active_page.title, page.title),
+                 source = (this.active_page.title < page.title) ? this.active_page : page,
+                 target = (this.active_page.title < page.title) ? page : this.active_page;
+            this.historylinks[lkey] = {source: source, target: target, type:"history"};
+        }
+        
+        this.active_page = page;
+        this.active_page.active = true;
+        this.activate_linked_nodes(this.active_page, true);
+
+        this.events.emit("page", this.active_page.title);
+
+        this.net.update_nodes();
+        this.net.update_forces();
+    }
+
+    set_show_history (value) {
+        console.log("wikimapsimple.show_history", value);
+        if (this.show_history !== value) {
+            this.show_history = value;
+            if (this.show_history) {
+                let graph = {};
+                graph.nodes = this.nodes;
+                graph.links = this.links.slice();
+                for (var key in this.historylinks) {
+                    graph.links.push(this.historylinks[key])
+                }
+                this.net.update_graph(graph);
+            } else {
+                let graph = {};
+                graph.nodes = this.nodes;
+                graph.links = this.links;
+                this.net.update_graph(graph);
+            }
+        }
+    }
+/*
+    async load (page) {
+        console.log("loading", page.title);
+        var links = await page.get_links(),
+            backlinks = await page.get_linkshere(),
+            alllinks = this.wiki.union(links, backlinks);
+
+        page.all_links = alllinks;
+        // console.log("alllinks", alllinks);
+        var graph = {};
+
+        graph.nodes = values(this.wiki.pages_by_title);
+        graph.links = [];
+        this.walk(page, graph.links);
+        // activate historylinks
+        values(this.historylinks).forEach(x => {
+            graph.links.push(x);
+        })
+        // graph.links = titles.map(t => ({source: pagetitle, target: t}));
+        this.update_graph(graph);
+        // console.log("GOT DATA", titles);
+        // return titles;
+    }
+*/
+}
+
+
+
+// http://erg.activearchives.org/mw/api.php?action=query&prop=links&titles=Bienvenue_%C3%A0_l%E2%80%99erg
+// http://erg.activearchives.org/w/api.php?action=query&prop=info&titles=Main%20Page
+// Bienvenue_à_l’erg
+// http://erg.activearchives.org/mw/index.php/Bienvenue_%C3%A0_l%E2%80%99erg
diff --git a/src/wikimaptotal.js b/src/wikimaptotal.js
new file mode 100644
index 0000000..c14c278
--- /dev/null
+++ b/src/wikimaptotal.js
@@ -0,0 +1,6 @@
+
+import { SimpleMap } from './wikimapsimple.js';
+
+// gather ALL nodes + links from the wiki via the API
+
+export { SimpleMap };
diff --git a/style.css b/style.css
new file mode 100644
index 0000000..baee288
--- /dev/null
+++ b/style.css
@@ -0,0 +1,183 @@
+#content {
+    position: absolute;
+    left: 0; top: 0; right: 0; bottom: 0;
+    background: #EEE;
+}
+
+#wiki {
+    position: absolute;
+    left: 50%;
+    right: 0;
+    top: 0;
+    bottom: 0;
+}
+#wiki iframe {
+    width: 100%;
+    height: 100%;
+    border: none;
+}
+body {
+    margin: 0;
+    overflow: hidden;
+}
+
+#controls {
+    position: absolute;
+    z-index:10;
+    bottom: 0;
+    display: none;
+}
+
+.links line {
+  /*stroke: #aaa;*/
+  stroke: none;
+}
+
+.links line.active2 {
+    stroke: red;
+}
+
+.links line.history {
+    stroke: purple;
+}
+
+.active {
+    stroke: red;
+}
+
+.category circle {
+    fill: yellow;
+}
+
+.web circle {
+    fill: purple;
+}
+
+.news circle {
+    fill: lightgray;
+}
+
+.template circle {
+    fill: lightgreen;
+}
+
+.discussion circle {
+    fill: aqua;
+}
+
+svg {
+    font: 10px sans-serif;
+}
+
+svg g.page {
+    cursor: pointer;
+}
+
+svg g.page text {
+    visibility: hidden;
+    fill: #222;
+    font: 10px sans-serif;
+}
+
+svg g.active text {
+    visibility: visible;
+}
+
+svg g.mouse text {
+    visibility: visible;
+}
+
+#cats {
+    position: absolute;
+    left: 0;
+    bottom: 0;
+}
+#cats .ocontents {
+    background: #FFFFFFDD;
+    display: none;
+    /*padding: 5px;*/
+    /*box-sizing: border-box;*/
+}
+#cats.expanded .ocontents {
+    display: block;
+}
+
+/* showall class */
+#cats div.cat {
+    display: none;
+}
+#cats div.cat span.spacing {
+    display: none;
+}
+#cats div.cat.icon {
+    display: block;
+}
+#cats.showall div.cat {
+    display: block;
+}
+#cats.showall div.cat span.spacing {
+    display: inline;
+}
+
+
+#cats .contents {
+    overflow: auto;
+    height: 50vh;
+    min-width: 300px;
+}
+#cats .contents .scroll {
+}
+#cats .botright {
+    position: absolute;
+    right: 0;
+    bottom: 0;
+}
+#cats .botright .thumb {
+    position: absolute;
+    left: 0;
+    bottom: 0;
+    width: 32px;
+    height: 32px;
+    background: #FFFFFFDD;
+}
+#cats div.cat span.icon {
+    position: relative;
+    top: 4px;
+    display: inline-block;
+    width: 18px;
+    height: 18px;
+    background-repeat: no-repeat;
+    margin-right: 4px;
+}
+#cats div.cat span.count {
+    padding: 0px 3px;
+    background: #DDD;
+    color: #444;
+    font-size: 10px;
+    margin-left: 4px;
+}
+#cats div.cat a {
+    color: black;
+    text-decoration: none;
+}
+
+
+use {
+    fill: #EEE;
+    stroke: black;
+}
+.active use {
+    fill: #FFF;
+    stroke: red;
+}
+.active text {
+    stroke: black;
+}
+.active2 use {
+    fill: #FFF;
+    stroke: red;
+}
+.highlight use {
+    fill: #FFF;
+    stroke: orange;
+}
\ No newline at end of file
diff --git a/symbols.00.svg b/symbols.00.svg
new file mode 100644
index 0000000..6d1248c
--- /dev/null
+++ b/symbols.00.svg
@@ -0,0 +1,241 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
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diff --git a/symbols.svg b/symbols.svg
new file mode 100644
index 0000000..71e3184
--- /dev/null
+++ b/symbols.svg
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