From 8b77e95d154c5477b5b597cbbf3d8ebcd9cfdd3b Mon Sep 17 00:00:00 2001
From: Mike Samuel <mikesamuel@gmail.com>
Date: Wed, 27 Mar 2019 16:24:15 -0400
Subject: [PATCH] copy from tc39/template-for-proposals

---
 .gitattributes    |    3 +
 .gitignore        |   45 +-
 .npmrc            |    1 +
 index.html        | 1835 ++++++++++++++++++++++++++++++++++++
 package-lock.json | 2261 ---------------------------------------------
 package.json      |    3 +
 spec.emu          |   23 +
 7 files changed, 1908 insertions(+), 2263 deletions(-)
 create mode 100644 .gitattributes
 create mode 100644 .npmrc
 create mode 100644 index.html
 delete mode 100644 package-lock.json
 create mode 100644 spec.emu
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..31e2b43
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+index.html  -diff merge=ours
+spec.js     -diff merge=ours
+spec.css    -diff merge=ours
diff --git a/.gitignore b/.gitignore
index 5de3df8..fd18f10 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,45 @@
-# node
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
 node_modules
-# emacs droppings
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
+
+# Only apps should have lockfiles
+yarn.lock
+package-lock.json
+npm-shrinkwrap.json
+
+# Emacs droppings
 *~
\ No newline at end of file
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..43c97e7
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+package-lock=false
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..d5e1ad4
--- /dev/null
+++ b/index.html
@@ -0,0 +1,1835 @@
+<!doctype html>
+<head><meta charset="utf-8">
+<link rel="stylesheet" href="./spec.css">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/styles/github.min.css">
+<script src="./spec.js"></script>
+<title>Array.isTemplateObject</title><script type="application/json" id="menu-search-biblio">[{"type":"clause","id":"sec-demo-clause","aoid":null,"title":"This is an emu-clause","titleHTML":"This is an emu-clause","number":"1","namespace":"<no location>","location":"","referencingIds":[],"key":"This is an emu-clause"},{"type":"clause","id":"sec-copyright-and-software-license","aoid":null,"title":"Copyright & Software License","titleHTML":"Copyright &amp; Software License","number":"A","namespace":"<no location>","location":"","referencingIds":[],"key":"Copyright & Software License"}]</script><script>"use strict";
+
+function Search(menu) {
+  this.menu = menu;
+  this.$search = document.getElementById('menu-search');
+  this.$searchBox = document.getElementById('menu-search-box');
+  this.$searchResults = document.getElementById('menu-search-results');
+  
+  this.loadBiblio();
+  
+  document.addEventListener('keydown', this.documentKeydown.bind(this));
+  
+  this.$searchBox.addEventListener('keydown', debounce(this.searchBoxKeydown.bind(this), { stopPropagation: true }));
+  this.$searchBox.addEventListener('keyup', debounce(this.searchBoxKeyup.bind(this), { stopPropagation: true }));
+}
+
+Search.prototype.loadBiblio = function () {
+  var $biblio = document.getElementById('menu-search-biblio');
+  if (!$biblio) {
+    this.biblio = [];
+  } else {
+    this.biblio = JSON.parse($biblio.textContent);
+    this.biblio.clauses = this.biblio.filter(function (e) { return e.type === 'clause' });
+    this.biblio.byId = this.biblio.reduce(function (map, entry) {
+      map[entry.id] = entry;
+      return map;
+    }, {});
+  }
+}
+
+Search.prototype.documentKeydown = function (e) {
+  if (e.keyCode === 191) {
+    e.preventDefault();
+    e.stopPropagation();
+    this.triggerSearch();
+  }
+}
+
+Search.prototype.searchBoxKeydown = function (e) {
+  e.stopPropagation();
+  e.preventDefault();
+  if (e.keyCode === 191 && e.target.value.length === 0) {
+    e.preventDefault();
+  } else if (e.keyCode === 13) {
+    e.preventDefault();
+    this.selectResult();
+  }
+}
+
+Search.prototype.searchBoxKeyup = function (e) {
+  if (e.keyCode === 13 || e.keyCode === 9) {
+    return;
+  }
+  
+  this.search(e.target.value);
+}
+
+
+Search.prototype.triggerSearch = function (e) {
+  if (this.menu.isVisible()) {
+    this._closeAfterSearch = false;
+  } else {
+    this._closeAfterSearch = true;
+    this.menu.show();
+  }
+
+  this.$searchBox.focus();
+  this.$searchBox.select();
+}
+// bit 12 - Set if the result starts with searchString
+// bits 8-11: 8 - number of chunks multiplied by 2 if cases match, otherwise 1.
+// bits 1-7: 127 - length of the entry
+// General scheme: prefer case sensitive matches with fewer chunks, and otherwise
+// prefer shorter matches.
+function relevance(result, searchString) {
+  var relevance = 0;
+  
+  relevance = Math.max(0, 8 - result.match.chunks) << 7;
+  
+  if (result.match.caseMatch) {
+    relevance *= 2;
+  }
+  
+  if (result.match.prefix) {
+    relevance += 2048
+  }
+  
+  relevance += Math.max(0, 255 - result.entry.key.length);
+  
+  return relevance;
+}
+
+Search.prototype.search = function (searchString) {
+  var s = Date.now();
+
+  if (searchString === '') {
+    this.displayResults([]);
+    this.hideSearch();
+    return;
+  } else {
+    this.showSearch();
+  }
+  
+  if (searchString.length === 1) {
+    this.displayResults([]);
+    return;
+  }
+    
+  var results;
+
+  if (/^[\d\.]*$/.test(searchString)) {
+    results = this.biblio.clauses.filter(function (clause) {
+      return clause.number.substring(0, searchString.length) === searchString;
+    }).map(function (clause) {
+      return { entry: clause };
+    });
+  } else {
+    results = [];
+    
+    for (var i = 0; i < this.biblio.length; i++) {
+      var entry = this.biblio[i];
+      if (!entry.key) {
+        // biblio entries without a key aren't searchable
+        continue;
+      }
+
+      var match = fuzzysearch(searchString, entry.key);
+      if (match) {
+        results.push({ entry: entry, match: match });
+      }
+    }
+  
+    results.forEach(function (result) {
+      result.relevance = relevance(result, searchString);
+    });
+    
+    results = results.sort(function (a, b) { return b.relevance - a.relevance });
+
+  }
+
+  if (results.length > 50) {
+    results = results.slice(0, 50);
+  }
+  
+  this.displayResults(results);
+}
+Search.prototype.hideSearch = function () {
+  this.$search.classList.remove('active');
+}
+
+Search.prototype.showSearch = function () {
+  this.$search.classList.add('active');
+}
+
+Search.prototype.selectResult = function () {
+  var $first = this.$searchResults.querySelector('li:first-child a');
+
+  if ($first) {
+    document.location = $first.getAttribute('href');
+  }
+  
+  this.$searchBox.value = '';
+  this.$searchBox.blur();
+  this.displayResults([]);
+  this.hideSearch();
+
+  if (this._closeAfterSearch) {
+    this.menu.hide();
+  }
+}
+
+Search.prototype.displayResults = function (results) {
+  if (results.length > 0) {
+    this.$searchResults.classList.remove('no-results');
+    
+    var html = '<ul>';
+
+    results.forEach(function (result) {
+      var entry = result.entry;
+      var id = entry.id;
+      var cssClass = '';
+      var text = '';
+
+      if (entry.type === 'clause') {
+        var number = entry.number ? entry.number + ' ' : '';
+        text = number + entry.key;
+        cssClass = 'clause';
+        id = entry.id;
+      } else if (entry.type === 'production') {
+        text = entry.key;
+        cssClass = 'prod';
+        id = entry.id;  
+      } else if (entry.type === 'op') {
+        text = entry.key;
+        cssClass = 'op';
+        id = entry.id || entry.refId;
+      } else if (entry.type === 'term') {
+        text = entry.key;
+        cssClass = 'term';
+        id = entry.id || entry.refId;
+      }
+
+      if (text) {
+        html += '<li class=menu-search-result-' + cssClass + '><a href="#' + id + '">' + text + '</a></li>'
+      }
+    });
+
+    html += '</ul>'
+
+    this.$searchResults.innerHTML = html;
+  } else {
+    this.$searchResults.innerHTML = '';
+    this.$searchResults.classList.add('no-results');
+  }
+}
+
+
+function Menu() {
+  this.$toggle = document.getElementById('menu-toggle');
+  this.$menu = document.getElementById('menu');
+  this.$toc = document.querySelector('menu-toc > ol');
+  this.$pins = document.querySelector('#menu-pins');
+  this.$pinList = document.getElementById('menu-pins-list');
+  this.$toc = document.querySelector('#menu-toc > ol');
+  this.$specContainer = document.getElementById('spec-container');
+  this.search = new Search(this);
+  
+  this._pinnedIds = {}; 
+  this.loadPinEntries();
+
+  // toggle menu
+  this.$toggle.addEventListener('click', this.toggle.bind(this));
+
+  // keydown events for pinned clauses
+  document.addEventListener('keydown', this.documentKeydown.bind(this));
+
+  // toc expansion
+  var tocItems = this.$menu.querySelectorAll('#menu-toc li');
+  for (var i = 0; i < tocItems.length; i++) {
+    var $item = tocItems[i];
+    $item.addEventListener('click', function($item, event) {
+      $item.classList.toggle('active');
+      event.stopPropagation();
+    }.bind(null, $item));
+  }
+
+  // close toc on toc item selection
+  var tocLinks = this.$menu.querySelectorAll('#menu-toc li > a');
+  for (var i = 0; i < tocLinks.length; i++) {
+    var $link = tocLinks[i];
+    $link.addEventListener('click', function(event) {
+      this.toggle();
+      event.stopPropagation();
+    }.bind(this));
+  }
+
+  // update active clause on scroll
+  window.addEventListener('scroll', debounce(this.updateActiveClause.bind(this)));
+  this.updateActiveClause();
+
+  // prevent menu scrolling from scrolling the body
+  this.$toc.addEventListener('wheel', function (e) {
+    var target = e.currentTarget;
+    var offTop = e.deltaY < 0 && target.scrollTop === 0;
+    if (offTop) {
+      e.preventDefault();
+    }
+    var offBottom = e.deltaY > 0
+                    && target.offsetHeight + target.scrollTop >= target.scrollHeight;
+
+    if (offBottom) {
+		  e.preventDefault();
+	  }
+  })
+}
+
+Menu.prototype.documentKeydown = function (e) {
+  e.stopPropagation();
+  if (e.keyCode === 80) {
+    this.togglePinEntry();
+  } else if (e.keyCode > 48 && e.keyCode < 58) {
+    this.selectPin(e.keyCode - 49);
+  }
+}
+
+Menu.prototype.updateActiveClause = function () {
+  this.setActiveClause(findActiveClause(this.$specContainer))
+}
+
+Menu.prototype.setActiveClause = function (clause) {
+  this.$activeClause = clause;
+  this.revealInToc(this.$activeClause);
+}
+
+Menu.prototype.revealInToc = function (path) {
+  var current = this.$toc.querySelectorAll('li.revealed');
+  for (var i = 0; i < current.length; i++) {
+    current[i].classList.remove('revealed');
+    current[i].classList.remove('revealed-leaf');
+  }
+  
+  var current = this.$toc;
+  var index = 0;
+  while (index < path.length) {
+    var children = current.children;
+    for (var i = 0; i < children.length; i++) {
+      if ('#' + path[index].id === children[i].children[1].getAttribute('href') ) {
+        children[i].classList.add('revealed');
+        if (index === path.length - 1) {
+          children[i].classList.add('revealed-leaf');
+          var rect = children[i].getBoundingClientRect();
+          this.$toc.getBoundingClientRect().top
+          var tocRect = this.$toc.getBoundingClientRect();
+          if (rect.top + 10 > tocRect.bottom) {
+            this.$toc.scrollTop = this.$toc.scrollTop + (rect.top - tocRect.bottom) + (rect.bottom - rect.top);
+          } else if (rect.top < tocRect.top) {
+            this.$toc.scrollTop = this.$toc.scrollTop - (tocRect.top - rect.top);
+          }
+        }
+        current = children[i].querySelector('ol');
+        index++;
+        break;
+      }      
+    }
+    
+  }
+}
+
+function findActiveClause(root, path) {
+  var clauses = new ClauseWalker(root);
+  var $clause;
+  var found = false;
+  var path = path || [];
+  
+  while ($clause = clauses.nextNode()) {
+    var rect = $clause.getBoundingClientRect();
+    var $header = $clause.children[0];
+    var marginTop = parseInt(getComputedStyle($header)["margin-top"]);
+    
+    if ((rect.top - marginTop) <= 0 && rect.bottom > 0) {
+      found = true;
+      return findActiveClause($clause, path.concat($clause)) || path;
+    }
+  }
+  
+  return path;
+}
+
+function ClauseWalker(root) {
+  var previous;
+  var treeWalker = document.createTreeWalker(
+    root,
+    NodeFilter.SHOW_ELEMENT,
+    {
+      acceptNode: function (node) {
+        if (previous === node.parentNode) {
+          return NodeFilter.FILTER_REJECT;
+        } else {
+          previous = node;
+        }
+        if (node.nodeName === 'EMU-CLAUSE' || node.nodeName === 'EMU-INTRO' || node.nodeName === 'EMU-ANNEX') {
+          return NodeFilter.FILTER_ACCEPT;
+        } else {
+          return NodeFilter.FILTER_SKIP;
+        }
+      }
+    },
+    false
+    );
+  
+  return treeWalker;
+}
+
+Menu.prototype.toggle = function () {
+  this.$menu.classList.toggle('active');
+}
+
+Menu.prototype.show = function () {
+  this.$menu.classList.add('active');
+}
+
+Menu.prototype.hide = function () {
+  this.$menu.classList.remove('active');
+}
+
+Menu.prototype.isVisible = function() {
+  return this.$menu.classList.contains('active');
+}
+
+Menu.prototype.showPins = function () {
+  this.$pins.classList.add('active');
+}
+
+Menu.prototype.hidePins = function () {
+  this.$pins.classList.remove('active');
+}
+
+Menu.prototype.addPinEntry = function (id) {
+  var entry = this.search.biblio.byId[id];
+  if (!entry) {
+    // id was deleted after pin (or something) so remove it
+    delete this._pinnedIds[id];
+    this.persistPinEntries();
+    return;
+  }
+
+  if (entry.type === 'clause') {
+    var prefix;
+    if (entry.number) {
+      prefix = entry.number + ' ';
+    } else {
+      prefix = '';
+    }
+    this.$pinList.innerHTML += '<li><a href="#' + entry.id + '">' + prefix + entry.titleHTML + '</a></li>';
+  } else {
+    this.$pinList.innerHTML += '<li><a href="#' + entry.id + '">' + entry.key + '</a></li>';
+  }
+
+  if (Object.keys(this._pinnedIds).length === 0) {
+    this.showPins();
+  }
+  this._pinnedIds[id] = true;
+  this.persistPinEntries();
+}
+
+Menu.prototype.removePinEntry = function (id) {
+  var item = this.$pinList.querySelector('a[href="#' + id + '"]').parentNode;
+  this.$pinList.removeChild(item);
+  delete this._pinnedIds[id];
+  if (Object.keys(this._pinnedIds).length === 0) {
+    this.hidePins();
+  }
+
+  this.persistPinEntries();
+}
+
+Menu.prototype.persistPinEntries = function () {
+  try {
+    if (!window.localStorage) return;
+  } catch (e) {
+    return;
+  }
+
+  localStorage.pinEntries = JSON.stringify(Object.keys(this._pinnedIds));
+}
+
+Menu.prototype.loadPinEntries = function () {
+  try {
+    if (!window.localStorage) return;
+  } catch (e) {
+    return;
+  }
+  
+  var pinsString = window.localStorage.pinEntries;
+  if (!pinsString) return;
+  var pins = JSON.parse(pinsString);
+  for(var i = 0; i < pins.length; i++) {
+    this.addPinEntry(pins[i]);
+  }
+}
+
+Menu.prototype.togglePinEntry = function (id) {
+  if (!id) {
+    id = this.$activeClause[this.$activeClause.length - 1].id;
+  }
+
+  if (this._pinnedIds[id]) {
+    this.removePinEntry(id);
+  } else {
+    this.addPinEntry(id);
+  }
+}
+
+Menu.prototype.selectPin = function (num) {
+  document.location = this.$pinList.children[num].children[0].href;
+}
+
+var menu;
+function init() {
+  menu = new Menu();
+  var $container = document.getElementById('spec-container');
+  $container.addEventListener('mouseover', debounce(function (e) {
+    Toolbox.activateIfMouseOver(e);
+  }));
+}
+
+document.addEventListener('DOMContentLoaded', init);
+
+function debounce(fn, opts) {
+  opts = opts || {};
+  var timeout;
+  return function(e) {
+    if (opts.stopPropagation) {
+      e.stopPropagation();
+    }
+    var args = arguments;
+    if (timeout) {
+      clearTimeout(timeout);
+    }
+    timeout = setTimeout(function() {
+      timeout = null;
+      fn.apply(this, args);
+    }.bind(this), 150);
+  }
+}
+
+var CLAUSE_NODES = ['EMU-CLAUSE', 'EMU-INTRO', 'EMU-ANNEX'];
+function findLocalReferences ($elem) {
+  var name = $elem.innerHTML;
+  var references = [];
+
+  var parentClause = $elem.parentNode;
+  while (parentClause && CLAUSE_NODES.indexOf(parentClause.nodeName) === -1) {
+    parentClause = parentClause.parentNode;
+  }
+
+  if(!parentClause) return;
+
+  var vars = parentClause.querySelectorAll('var');
+
+  for (var i = 0; i < vars.length; i++) {
+    var $var = vars[i];
+
+    if ($var.innerHTML === name) {
+      references.push($var);
+    }
+  }
+
+  return references;
+}
+
+function toggleFindLocalReferences($elem) {
+  var references = findLocalReferences($elem);
+  if ($elem.classList.contains('referenced')) {
+    references.forEach(function ($reference) {
+      $reference.classList.remove('referenced');
+    });
+  } else {
+    references.forEach(function ($reference) {
+      $reference.classList.add('referenced');
+    });
+  }
+}
+
+function installFindLocalReferences () {
+  document.addEventListener('click', function (e) {
+    if (e.target.nodeName === 'VAR') {
+      toggleFindLocalReferences(e.target);
+    }
+  });
+}
+
+document.addEventListener('DOMContentLoaded', installFindLocalReferences);
+
+
+
+
+// The following license applies to the fuzzysearch function
+// The MIT License (MIT)
+// Copyright © 2015 Nicolas Bevacqua
+// Copyright © 2016 Brian Terlson
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+function fuzzysearch (searchString, haystack, caseInsensitive) {
+  var tlen = haystack.length;
+  var qlen = searchString.length;
+  var chunks = 1;
+  var finding = false;
+  var prefix = true;
+  
+  if (qlen > tlen) {
+    return false;
+  }
+  
+  if (qlen === tlen) {
+    if (searchString === haystack) {
+      return { caseMatch: true, chunks: 1, prefix: true };
+    } else if (searchString.toLowerCase() === haystack.toLowerCase()) {
+      return { caseMatch: false, chunks: 1, prefix: true };
+    } else {
+      return false;
+    }
+  }
+  
+  outer: for (var i = 0, j = 0; i < qlen; i++) {
+    var nch = searchString[i];
+    while (j < tlen) {
+      var targetChar = haystack[j++];
+      if (targetChar === nch) {
+        finding = true;
+        continue outer;
+      }
+      if (finding) {
+        chunks++;
+        finding = false;
+      }
+    }
+    
+    if (caseInsensitive) { return false }
+    
+    return fuzzysearch(searchString.toLowerCase(), haystack.toLowerCase(), true);
+  }
+  
+  return { caseMatch: !caseInsensitive, chunks: chunks, prefix: j <= qlen };
+}
+
+var Toolbox = {
+  init: function () {
+    this.$container = document.createElement('div');
+    this.$container.classList.add('toolbox');
+    this.$permalink = document.createElement('a');
+    this.$permalink.textContent = 'Permalink';
+    this.$pinLink = document.createElement('a');
+    this.$pinLink.textContent = 'Pin';
+    this.$pinLink.setAttribute('href', '#');
+    this.$pinLink.addEventListener('click', function (e) {
+      e.preventDefault();
+      e.stopPropagation();
+      menu.togglePinEntry(this.entry.id);
+    }.bind(this));
+
+    this.$refsLink = document.createElement('a');
+    this.$refsLink.setAttribute('href', '#');
+    this.$refsLink.addEventListener('click', function (e) {
+      e.preventDefault();
+      e.stopPropagation();
+      referencePane.showReferencesFor(this.entry);
+    }.bind(this));
+    this.$container.appendChild(this.$permalink);
+    this.$container.appendChild(this.$pinLink);
+    this.$container.appendChild(this.$refsLink);
+    document.body.appendChild(this.$container);
+  },
+
+  activate: function (el, entry, target) {
+    if (el === this._activeEl) return;
+    this.active = true;
+    this.entry = entry;
+    this.$container.classList.add('active');
+    this.top = el.offsetTop - this.$container.offsetHeight - 10;
+    this.left = el.offsetLeft;
+    this.$container.setAttribute('style', 'left: ' + this.left + 'px; top: ' + this.top + 'px');
+    this.updatePermalink();
+    this.updateReferences();
+    this._activeEl = el;
+    if (this.top < document.body.scrollTop && el === target) {
+      // don't scroll unless it's a small thing (< 200px)
+      this.$container.scrollIntoView();
+    }
+  },
+
+  updatePermalink: function () {
+    this.$permalink.setAttribute('href', '#' + this.entry.id);
+  },
+
+  updateReferences: function () {
+    this.$refsLink.textContent = 'References (' + this.entry.referencingIds.length + ')';
+  },
+
+  activateIfMouseOver: function (e) {
+    var ref = this.findReferenceUnder(e.target);
+    if (ref && (!this.active || e.pageY > this._activeEl.offsetTop)) {
+      var entry = menu.search.biblio.byId[ref.id];
+      this.activate(ref.element, entry, e.target);
+    } else if (this.active && ((e.pageY < this.top) || e.pageY > (this._activeEl.offsetTop + this._activeEl.offsetHeight))) {
+      this.deactivate();
+    }
+  },
+
+  findReferenceUnder: function (el) {
+    while (el) {
+      var parent = el.parentNode;
+      if (el.nodeName === 'H1' && parent.nodeName.match(/EMU-CLAUSE|EMU-ANNEX|EMU-INTRO/) && parent.id) {
+        return { element: el, id: parent.id };
+      } else if (el.nodeName.match(/EMU-(?!CLAUSE|XREF|ANNEX|INTRO)|DFN/) &&
+                el.id && el.id[0] !== '_') {
+        if (el.nodeName === 'EMU-FIGURE' || el.nodeName === 'EMU-TABLE' || el.nodeName === 'EMU-EXAMPLE') {
+          // return the figcaption element
+          return { element: el.children[0].children[0], id: el.id };
+        } else if (el.nodeName === 'EMU-PRODUCTION') {
+          // return the LHS non-terminal element
+          return { element: el.children[0], id: el.id };
+        } else {
+          return { element: el, id: el.id };
+        }
+      }
+      el = parent;
+    }
+  },
+
+  deactivate: function () {
+    this.$container.classList.remove('active');
+    this._activeEl = null;
+    this.activeElBounds = null;
+    this.active = false;
+  }
+}
+
+var referencePane = {
+  init: function() {
+    this.$container = document.createElement('div');
+    this.$container.setAttribute('id', 'references-pane-container');
+
+    var $spacer = document.createElement('div');
+    $spacer.setAttribute('id', 'references-pane-spacer');
+
+    this.$pane = document.createElement('div');
+    this.$pane.setAttribute('id', 'references-pane');
+
+    this.$container.appendChild($spacer);
+    this.$container.appendChild(this.$pane);
+
+    this.$header = document.createElement('div');
+    this.$header.classList.add('menu-pane-header');
+    this.$header.textContent = 'References to ';
+    this.$headerRefId = document.createElement('a');
+    this.$header.appendChild(this.$headerRefId);
+    this.$closeButton = document.createElement('span');
+    this.$closeButton.setAttribute('id', 'references-pane-close');
+    this.$closeButton.addEventListener('click', function (e) {
+      this.deactivate();
+    }.bind(this));
+    this.$header.appendChild(this.$closeButton);
+
+    this.$pane.appendChild(this.$header);
+    var tableContainer = document.createElement('div');
+    tableContainer.setAttribute('id', 'references-pane-table-container');
+
+    this.$table = document.createElement('table');
+    this.$table.setAttribute('id', 'references-pane-table');
+
+    this.$tableBody = this.$table.createTBody();
+
+    tableContainer.appendChild(this.$table);
+    this.$pane.appendChild(tableContainer);
+
+    menu.$specContainer.appendChild(this.$container);
+  },
+
+  activate: function () {
+    this.$container.classList.add('active');
+  },
+
+  deactivate: function () {
+    this.$container.classList.remove('active');
+  },
+
+  showReferencesFor(entry) {
+    this.activate();
+    var newBody = document.createElement('tbody');
+    var previousId;
+    var previousCell;
+    var dupCount = 0;
+    this.$headerRefId.textContent = '#' + entry.id;
+    this.$headerRefId.setAttribute('href', '#' + entry.id);
+    entry.referencingIds.map(function (id) {
+      var target = document.getElementById(id);
+      var cid = findParentClauseId(target);
+      var clause = menu.search.biblio.byId[cid];
+      var dupCount = 0;
+      return { id: id, clause: clause }
+    }).sort(function (a, b) {
+      return sortByClauseNumber(a.clause, b.clause);
+    }).forEach(function (record, i) {
+      if (previousId === record.clause.id) {
+        previousCell.innerHTML += ' (<a href="#' + record.id + '">' + (dupCount + 2) + '</a>)';
+        dupCount++;
+      } else {
+        var row = newBody.insertRow();
+        var cell = row.insertCell();
+        cell.innerHTML = record.clause.number;
+        cell = row.insertCell();
+        cell.innerHTML = '<a href="#' + record.id + '">' + record.clause.titleHTML + '</a>';
+        previousCell = cell;
+        previousId = record.clause.id;
+        dupCount = 0;
+      }
+    }, this);
+    this.$table.removeChild(this.$tableBody);
+    this.$tableBody = newBody;
+    this.$table.appendChild(this.$tableBody);
+  }
+}
+function findParentClauseId(node) {
+  while (node && node.nodeName !== 'EMU-CLAUSE' && node.nodeName !== 'EMU-INTRO' && node.nodeName !== 'EMU-ANNEX') {
+    node = node.parentNode;
+  }
+  if (!node) return null;
+  return node.getAttribute('id');
+}
+
+function sortByClauseNumber(c1, c2) {
+  var c1c = c1.number.split('.');
+  var c2c = c2.number.split('.');
+
+  for (var i = 0; i < c1c.length; i++) {
+    if (i >= c2c.length) {
+      return 1;
+    }
+    
+    var c1 = c1c[i];
+    var c2 = c2c[i];
+    var c1cn = Number(c1);
+    var c2cn = Number(c2);
+
+    if (Number.isNaN(c1cn) && Number.isNaN(c2cn)) {
+      if (c1 > c2) {
+        return 1;
+      } else if (c1 < c2) {
+        return -1;
+      }
+    } else if (!Number.isNaN(c1cn) && Number.isNaN(c2cn)) {
+      return -1;
+    } else if (Number.isNaN(c1cn) && !Number.isNaN(c2cn)) {
+      return 1;
+    } else if(c1cn > c2cn) {
+      return 1;
+    } else if (c1cn < c2cn) {
+      return -1;
+    }
+  }
+
+  if (c1c.length === c2c.length) {
+    return 0;
+  }
+  return -1;
+}
+
+document.addEventListener('DOMContentLoaded', function () {
+  Toolbox.init();
+  referencePane.init();
+})
+var CLAUSE_NODES = ['EMU-CLAUSE', 'EMU-INTRO', 'EMU-ANNEX'];
+function findLocalReferences ($elem) {
+  var name = $elem.innerHTML;
+  var references = [];
+
+  var parentClause = $elem.parentNode;
+  while (parentClause && CLAUSE_NODES.indexOf(parentClause.nodeName) === -1) {
+    parentClause = parentClause.parentNode;
+  }
+
+  if(!parentClause) return;
+
+  var vars = parentClause.querySelectorAll('var');
+
+  for (var i = 0; i < vars.length; i++) {
+    var $var = vars[i];
+
+    if ($var.innerHTML === name) {
+      references.push($var);
+    }
+  }
+
+  return references;
+}
+
+function toggleFindLocalReferences($elem) {
+  var references = findLocalReferences($elem);
+  if ($elem.classList.contains('referenced')) {
+    references.forEach(function ($reference) {
+      $reference.classList.remove('referenced');
+    });
+  } else {
+    references.forEach(function ($reference) {
+      $reference.classList.add('referenced');
+    });
+  }
+}
+
+function installFindLocalReferences () {
+  document.addEventListener('click', function (e) {
+    if (e.target.nodeName === 'VAR') {
+      toggleFindLocalReferences(e.target);
+    }
+  });
+}
+
+document.addEventListener('DOMContentLoaded', installFindLocalReferences);
+</script><style>body {
+  display: flex;
+  font-size: 18px;
+  line-height: 1.5;
+  font-family: Cambria, Palatino Linotype, Palatino, Liberation Serif, serif;
+  padding: 0;
+  margin: 0;
+  color: #111;
+}
+
+#spec-container {
+  padding: 0 20px;
+  flex-grow: 1;
+  flex-basis: 66%;
+  box-sizing: border-box;
+  overflow: hidden;
+}
+
+body.oldtoc {
+  margin: 0 auto;
+}
+
+a {
+    text-decoration: none;
+    color: #206ca7;
+}
+
+a:visited {
+  color: #206ca7;
+}
+
+a:hover {
+    text-decoration: underline;
+    color: #239dee;
+}
+
+
+code {
+    font-weight: bold;
+    font-family: Consolas, Monaco, monospace;
+    white-space: pre;
+}
+
+pre code {
+  font-weight: inherit;
+}
+
+pre code.hljs {
+  background-color: #fff;
+  margin: 0;
+  padding: 0;
+}
+
+ol.toc {
+    list-style: none;
+    padding-left: 0;
+}
+
+ol.toc ol.toc {
+    padding-left: 2ex;
+    list-style: none;
+}
+
+var {
+  color: #2aa198;
+  transition: background-color 0.25s ease;
+  cursor: pointer;
+}
+
+var.referenced {
+  background-color: #ffff33;
+}
+
+emu-const {
+  font-family: sans-serif;
+}
+
+emu-val {
+  font-weight: bold;
+}
+emu-alg ol, emu-alg ol ol ol ol {
+    list-style-type: decimal;
+}
+
+emu-alg ol ol, emu-alg ol ol ol ol ol {
+    list-style-type: lower-alpha;
+}
+
+emu-alg ol ol ol, ol ol ol ol ol ol {
+    list-style-type: lower-roman;
+}
+
+emu-eqn {
+  display: block;
+  margin-left: 4em;
+}
+
+emu-eqn.inline {
+  display: inline;
+  margin: 0;
+}
+
+emu-eqn div:first-child {
+  margin-left: -2em;
+}
+
+emu-note {
+    margin: 1em 0;
+    color: #666;
+    border-left: 5px solid #ccc;
+    display: flex;
+    flex-direction: row;
+}
+
+emu-note > span.note {
+    flex-basis: 100px;
+    min-width: 100px;
+    flex-grow: 0;
+    flex-shrink: 1;
+    text-transform: uppercase;
+    padding-left: 5px;
+}
+
+emu-note[type=editor] {
+  border-left-color: #faa;
+}
+
+emu-note > div.note-contents {
+  flex-grow: 1;
+  flex-shrink: 1;
+}
+
+emu-note > div.note-contents > p:first-of-type {
+  margin-top: 0;
+}
+
+emu-note > div.note-contents > p:last-of-type {
+  margin-bottom: 0;
+}
+
+emu-figure {
+  display: block;
+}
+
+emu-example {
+  display: block;
+  margin: 1em 3em;
+}
+
+emu-example figure figcaption {
+  margin-top: 0.5em;
+  text-align: left;
+}
+
+emu-figure figure,
+emu-example figure,
+emu-table figure {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+emu-production {
+    display: block;
+    margin-top: 1em;
+    margin-bottom: 1em;
+    margin-left: 5ex;
+}
+
+emu-grammar.inline, emu-production.inline,
+emu-grammar.inline emu-production emu-rhs, emu-production.inline emu-rhs,
+emu-grammar[collapsed] emu-production emu-rhs, emu-production[collapsed] emu-rhs {
+    display: inline;
+    padding-left: 1ex;
+    margin-left: 0;
+}
+
+emu-grammar[collapsed] emu-production, emu-production[collapsed] {
+    margin: 0;
+}
+
+emu-constraints {
+    font-size: .75em;
+    margin-right: 1ex;
+}
+
+emu-gann {
+    margin-right: 1ex;
+}
+
+emu-gann emu-t:last-child,
+emu-gann emu-nt:last-child {
+    margin-right: 0;
+}
+
+emu-geq {
+    margin-left: 1ex;
+    font-weight: bold;
+}
+
+emu-oneof {
+    font-weight: bold;
+    margin-left: 1ex;
+}
+
+emu-nt {
+    display: inline-block;
+    font-style: italic;
+    white-space: nowrap;
+    text-indent: 0;
+}
+
+emu-nt a, emu-nt a:visited {
+  color: #333;
+}
+
+emu-rhs emu-nt {
+    margin-right: 1ex;
+}
+
+emu-t {
+    display: inline-block;
+    font-family: monospace;
+    font-weight: bold;
+    white-space: nowrap;
+    text-indent: 0;
+}
+
+emu-production emu-t {
+    margin-right: 1ex;
+}
+
+emu-rhs {
+    display: block;
+    padding-left: 75px;
+    text-indent: -25px;
+}
+
+emu-mods {
+    font-size: .85em;
+    vertical-align: sub;
+    font-style: normal;
+    font-weight: normal;
+}
+
+emu-production[collapsed] emu-mods {
+  display: none;
+}
+
+emu-params, emu-opt {
+  margin-right: 1ex;
+  font-family: monospace;
+}
+
+emu-params, emu-constraints {
+  color: #2aa198;
+}
+
+emu-opt {
+  color: #b58900;
+}
+
+emu-gprose {
+    font-size: 0.9em;
+    font-family: Helvetica, Arial, sans-serif;
+}
+
+h1.shortname {
+  color: #f60;
+  font-size: 1.5em;
+  margin: 0;
+}
+
+h1.version {
+  color: #f60;
+  font-size: 1.5em;
+  margin: 0;
+}
+
+h1.title {
+  margin-top: 0;
+  color: #f60;
+}
+
+h1.first {
+  margin-top: 0;
+}
+
+h1, h2, h3, h4, h5, h6 {
+    position: relative;
+}
+
+h1 .secnum {
+  text-decoration: none;
+  margin-right: 10px;
+}
+
+h1 span.title {
+  order: 2;
+}
+
+
+h1 { font-size: 2.67em; margin-top: 2em; margin-bottom: 0; line-height: 1em;}
+h2 { font-size: 2em; }
+h3 { font-size: 1.56em; }
+h4 { font-size: 1.25em; }
+h5 { font-size: 1.11em; }
+h6 { font-size: 1em; }
+
+h1:hover span.utils {
+  display: block;
+}
+
+span.utils {
+  font-size: 18px;
+  line-height: 18px;
+  display: none;
+  position: absolute;
+  top: 100%;
+  left: 0;
+  right: 0;
+  font-weight: normal;
+}
+
+span.utils:before {
+    content: "⤷";
+    display: inline-block;
+    padding: 0 5px;
+}
+
+span.utils > * {
+  display: inline-block;
+  margin-right: 20px;
+}
+
+h1 span.utils span.anchor a,
+h2 span.utils span.anchor a,
+h3 span.utils span.anchor a,
+h4 span.utils span.anchor a,
+h5 span.utils span.anchor a,
+h6 span.utils span.anchor a {
+  text-decoration: none;
+  font-variant: small-caps;
+}
+
+h1 span.utils span.anchor a:hover,
+h2 span.utils span.anchor a:hover,
+h3 span.utils span.anchor a:hover,
+h4 span.utils span.anchor a:hover,
+h5 span.utils span.anchor a:hover,
+h6 span.utils span.anchor a:hover {
+  color: #333;
+}
+
+emu-intro h1, emu-clause h1, emu-annex h1 { font-size: 2em; }
+emu-intro h2, emu-clause h2, emu-annex h2 { font-size: 1.56em; }
+emu-intro h3, emu-clause h3, emu-annex h3 { font-size: 1.25em; }
+emu-intro h4, emu-clause h4, emu-annex h4 { font-size: 1.11em; }
+emu-intro h5, emu-clause h5, emu-annex h5 { font-size: 1em; }
+emu-intro h6, emu-clause h6, emu-annex h6 { font-size: 0.9em; }
+emu-intro emu-intro h1, emu-clause emu-clause h1, emu-annex emu-annex h1 { font-size: 1.56em; }
+emu-intro emu-intro h2, emu-clause emu-clause h2, emu-annex emu-annex h2 { font-size: 1.25em; }
+emu-intro emu-intro h3, emu-clause emu-clause h3, emu-annex emu-annex h3 { font-size: 1.11em; }
+emu-intro emu-intro h4, emu-clause emu-clause h4, emu-annex emu-annex h4 { font-size: 1em; }
+emu-intro emu-intro h5, emu-clause emu-clause h5, emu-annex emu-annex h5 { font-size: 0.9em; }
+emu-intro emu-intro emu-intro h1, emu-clause emu-clause emu-clause h1, emu-annex emu-annex emu-annex h1 { font-size: 1.25em; }
+emu-intro emu-intro emu-intro h2, emu-clause emu-clause emu-clause h2, emu-annex emu-annex emu-annex h2 { font-size: 1.11em; }
+emu-intro emu-intro emu-intro h3, emu-clause emu-clause emu-clause h3, emu-annex emu-annex emu-annex h3 { font-size: 1em; }
+emu-intro emu-intro emu-intro h4, emu-clause emu-clause emu-clause h4, emu-annex emu-annex emu-annex h4 { font-size: 0.9em; }
+emu-intro emu-intro emu-intro emu-intro h1, emu-clause emu-clause emu-clause emu-clause h1, emu-annex emu-annex emu-annex emu-annex h1 { font-size: 1.11em; }
+emu-intro emu-intro emu-intro emu-intro h2, emu-clause emu-clause emu-clause emu-clause h2, emu-annex emu-annex emu-annex emu-annex h2 { font-size: 1em; }
+emu-intro emu-intro emu-intro emu-intro h3, emu-clause emu-clause emu-clause emu-clause h3, emu-annex emu-annex emu-annex emu-annex h3 { font-size: 0.9em; }
+emu-intro emu-intro emu-intro emu-intro emu-intro h1, emu-clause emu-clause emu-clause emu-clause emu-clause h1, emu-annex emu-annex emu-annex emu-annex emu-annex h1 { font-size: 1em; }
+emu-intro emu-intro emu-intro emu-intro emu-intro h2, emu-clause emu-clause emu-clause emu-clause emu-clause h2, emu-annex emu-annex emu-annex emu-annex emu-annex h2 { font-size: 0.9em; }
+emu-intro emu-intro emu-intro emu-intro emu-intro emu-intro h1, emu-clause emu-clause emu-clause emu-clause emu-clause emu-clause h1, emu-annex emu-annex emu-annex emu-annex emu-annex emu-annex h1 { font-size: 0.9em }
+
+emu-clause, emu-intro, emu-annex {
+    display: block;
+}
+
+/* Figures and tables */
+figure { display: block; margin: 1em 0 3em 0; }
+figure object { display: block; margin: 0 auto; }
+figure table.real-table { margin: 0 auto; }
+figure figcaption {
+    display: block;
+    color: #555555;
+    font-weight: bold;
+    text-align: center;
+}
+
+emu-table table {
+  margin: 0 auto;
+}
+
+emu-table table, table.real-table {
+    border-collapse: collapse;
+}
+
+emu-table td, emu-table th, table.real-table td, table.real-table th {
+    border: 1px solid black;
+    padding: 0.4em;
+    vertical-align: baseline;
+}
+emu-table th, emu-table thead td, table.real-table th {
+    background-color: #eeeeee;
+}
+
+/* Note: the left content edges of table.lightweight-table >tbody >tr >td
+   and div.display line up. */
+table.lightweight-table {
+    border-collapse: collapse;
+    margin: 0 0 0 1.5em;
+}
+table.lightweight-table td, table.lightweight-table th {
+    border: none;
+    padding: 0 0.5em;
+    vertical-align: baseline;
+}
+
+/* diff styles */
+ins {
+    background-color: #e0f8e0;
+    text-decoration: none;
+    border-bottom: 1px solid #396;
+}
+
+del {
+    background-color: #fee;
+}
+
+ins.block, del.block,
+emu-production > ins, emu-production > del,
+emu-grammar > ins, emu-grammar > del {
+  display: block;
+}
+emu-rhs > ins, emu-rhs > del { 
+  display: inline;
+}
+
+tr.ins > td > ins {
+  border-bottom: none;
+}
+
+tr.ins > td {
+  background-color: #e0f8e0;
+}
+
+tr.del > td {
+  background-color: #fee;
+}
+
+/* Menu Styles */
+#menu-toggle {
+  font-size: 2em;
+
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 1.5em;
+  height: 1.5em;
+  z-index: 3;
+  visibility: hidden;
+  color: #1567a2;
+  background-color: #fff;
+
+  line-height: 1.5em;
+  text-align: center;
+  -webkit-touch-callout: none;
+  -webkit-user-select: none;
+  -khtml-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;;
+
+  cursor: pointer;
+}
+
+#menu {
+  display: flex;
+  flex-direction: column;
+  width: 33%; height: 100vh;
+  max-width: 500px;
+  box-sizing: border-box;
+  background-color: #ddd;
+  overflow: hidden;
+  transition: opacity 0.1s linear;
+  padding: 0 5px;
+  position: fixed;
+  left: 0; top: 0;
+  border-right: 2px solid #bbb;
+
+  z-index: 2;
+}
+
+#menu-spacer {
+  flex-basis: 33%;
+  max-width: 500px;
+  flex-grow: 0;
+  flex-shrink: 0;
+}
+
+#menu a {
+  color: #1567a2;
+}
+
+#menu.active {
+  display: flex;
+  opacity: 1;
+  z-index: 2;
+}
+
+#menu-pins {
+  flex-grow: 1;
+  display: none;
+}
+
+#menu-pins.active {
+  display: block;
+}
+
+#menu-pins-list {
+  margin: 0;
+  padding: 0;
+  counter-reset: pins-counter;
+}
+
+#menu-pins-list > li:before {
+  content: counter(pins-counter);
+  counter-increment: pins-counter;
+  display: inline-block;
+  width: 25px;
+  text-align: center;
+  border: 1px solid #bbb;
+  padding: 2px;
+  margin: 4px;
+  box-sizing: border-box;
+  line-height: 1em;
+  background-color: #ccc;
+  border-radius: 4px;
+}
+#menu-toc > ol {
+  padding: 0;
+  flex-grow: 1;
+}
+
+#menu-toc > ol li {
+  padding: 0;
+}
+
+#menu-toc > ol , #menu-toc > ol ol {
+  list-style-type: none;
+  margin: 0;
+  padding: 0;
+}
+
+#menu-toc > ol ol {
+  padding-left: 0.75em;
+}
+
+#menu-toc li {
+  text-overflow: ellipsis;
+  overflow: hidden;
+  white-space: nowrap;
+}
+
+#menu-toc .item-toggle {
+  display: inline-block;
+  transform: rotate(-45deg) translate(-5px, -5px);
+  transition: transform 0.1s ease;
+  text-align: center;
+  width: 20px;
+
+  color: #aab;
+
+  -webkit-touch-callout: none;
+  -webkit-user-select: none;
+  -khtml-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;;
+
+  cursor: pointer;
+}
+
+#menu-toc .item-toggle-none {
+  display: inline-block;
+  width: 20px;
+}
+
+#menu-toc li.active > .item-toggle {
+  transform: rotate(45deg) translate(-5px, -5px);
+}
+
+#menu-toc li > ol {
+  display: none;
+}
+
+#menu-toc li.active > ol {
+  display: block;
+}
+
+#menu-toc li.revealed > a {
+  background-color: #bbb;
+  font-weight: bold;
+  /*
+  background-color: #222;
+  color: #c6d8e4;
+  */
+}
+
+#menu-toc li.revealed-leaf> a {
+  color: #206ca7;
+  /*
+  background-color: #222;
+  color: #c6d8e4;
+  */
+}
+
+#menu-toc li.revealed > .item-toggle {
+  transform: rotate(45deg) translate(-5px, -5px);
+}
+
+#menu-toc li.revealed > ol {
+  display: block;
+}
+
+#menu-toc li > a {
+  padding: 2px 5px;
+}
+
+#menu > * {
+  margin-bottom: 5px;
+}
+
+.menu-pane-header {
+  padding: 0 5px;
+  text-transform: uppercase;
+  background-color: #aaa;
+  color: #335;
+  font-weight: bold;
+  letter-spacing: 2px;
+  flex-grow: 0;
+  flex-shrink: 0;
+  font-size: 0.8em;
+}
+
+#menu-toc {
+  display: flex;
+  flex-direction: column;
+  width: 100%;
+  overflow: hidden;
+  flex-grow: 1;
+}
+
+#menu-toc ol.toc {
+  overflow-x: hidden;
+  overflow-y: auto;
+}
+
+#menu-search {
+  position: relative;
+  flex-grow: 0;
+  flex-shrink: 0;
+  width: 100%;
+  
+  display: flex;
+  flex-direction: column;
+  
+  max-height: 300px;
+}
+
+#menu-trace-list {
+  display: none;
+}
+
+#menu-search-box {
+  box-sizing: border-box;
+  display: block;
+  width: 100%;
+  margin: 5px 0 0 0;
+  font-size: 1em;
+  padding: 2px;
+  background-color: #bbb;
+  border: 1px solid #999;
+}
+
+#menu-search-results {
+  overflow-x: hidden;
+  overflow-y: auto;
+}
+
+li.menu-search-result-clause:before {
+    content: 'clause';
+    width: 40px;
+    display: inline-block;
+    text-align: right;
+    padding-right: 1ex;
+    color: #666;
+    font-size: 75%;
+}
+li.menu-search-result-op:before {
+    content: 'op';
+    width: 40px;
+    display: inline-block;
+    text-align: right;
+    padding-right: 1ex;
+    color: #666;
+    font-size: 75%;
+}
+
+li.menu-search-result-prod:before {
+    content: 'prod';
+    width: 40px;
+    display: inline-block;
+    text-align: right;
+    padding-right: 1ex;
+    color: #666;
+    font-size: 75%
+}
+
+
+li.menu-search-result-term:before {
+    content: 'term';
+    width: 40px;
+    display: inline-block;
+    text-align: right;
+    padding-right: 1ex;
+    color: #666;
+    font-size: 75%
+}
+
+#menu-search-results ul {
+  padding: 0 5px;
+  margin: 0;
+}
+
+#menu-search-results li {
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
+
+
+#menu-trace-list {
+  counter-reset: item;
+  margin: 0 0 0 20px;
+  padding: 0;
+}
+#menu-trace-list li {
+  display: block;
+  white-space: nowrap;
+}
+
+#menu-trace-list li .secnum:after {
+  content: " ";
+}
+#menu-trace-list li:before {
+    content: counter(item) " ";
+    background-color: #222;
+    counter-increment: item;
+    color: #999;
+    width: 20px;
+    height: 20px;
+    line-height: 20px;
+    display: inline-block;
+    text-align: center;
+    margin: 2px 4px 2px 0;
+}
+
+@media (max-width: 1000px) {
+  body {
+    margin: 0;
+    display: block;
+  }
+
+  #menu {
+    display: none;
+    padding-top: 3em;
+    width: 450px;
+  }
+
+  #menu.active {
+    position: fixed;
+    height: 100%;
+    left: 0;
+    top: 0;
+    right: 300px;
+  }
+
+  #menu-toggle {
+    visibility: visible;
+  }
+
+  #spec-container {
+    padding: 0 5px;
+  }
+
+  #references-pane-spacer {
+    display: none;
+  }
+}
+
+@media only screen and (max-width: 800px) {
+  #menu {
+    width: 100%;
+  }
+
+  h1 .secnum:empty {
+    margin: 0; padding: 0;
+  }
+}
+
+
+/* Toolbox */
+.toolbox {
+	position: absolute;
+	background: #ddd;
+	border: 1px solid #aaa;
+  display: none;
+  color: #eee;
+  padding: 5px;
+  border-radius: 3px;
+}
+
+.toolbox.active {
+  display: inline-block;
+}
+
+.toolbox a {
+  text-decoration: none;
+  padding: 0 5px;
+}
+
+.toolbox a:hover {
+  text-decoration: underline;
+}
+
+.toolbox:after, .toolbox:before {
+	top: 100%;
+	left: 15px;
+	border: solid transparent;
+	content: " ";
+	height: 0;
+	width: 0;
+	position: absolute;
+	pointer-events: none;
+}
+
+.toolbox:after {
+	border-color: rgba(0, 0, 0, 0);
+	border-top-color: #ddd;
+	border-width: 10px;
+	margin-left: -10px;
+}
+.toolbox:before {
+	border-color: rgba(204, 204, 204, 0);
+	border-top-color: #aaa;
+	border-width: 12px;
+	margin-left: -12px;
+}
+
+#references-pane-container {
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  height: 250px;
+  display: none;
+  background-color: #ddd;
+  z-index: 1;
+}
+
+#references-pane-table-container {
+  overflow-x: hidden;
+  overflow-y: auto;
+}
+
+#references-pane-spacer {
+  flex-basis: 33%;
+  max-width: 500px;
+}
+
+#references-pane {
+  flex-grow: 1;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+}
+
+#references-pane-container.active {
+  display: flex;
+}
+
+#references-pane-close:after {
+  content: '✖';
+  float: right;
+  cursor: pointer;
+}
+
+#references-pane table tr td:first-child {
+  text-align: right;
+  padding-right: 5px;
+}
+
+@media print {
+  #menu-toggle {
+    display: none; 
+  }
+}
+</style></head><body><div id="menu-toggle">☰</div><div id="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins</div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-demo-clause" title="This is an emu-clause"><span class="secnum">1</span> This is an emu-clause</a></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">A</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version first">Stage 0 Draft / March 27, 2019</h1><h1 class="title">Array.isTemplateObject</h1>
+
+<emu-clause id="sec-demo-clause">
+  <h1><span class="secnum">1</span>This is an emu-clause</h1>
+  <p>This is an algorithm:</p>
+  <emu-alg><ol><li>Let <var>proposal</var> be <emu-val>undefined</emu-val>.</li><li>If IsAccepted(<var>proposal</var>),<ol><li>Let <var>stage</var> be <emu-val>0</emu-val>.</li></ol></li><li>Else,<ol><li>Let <var>stage</var> be <emu-val>-1</emu-val>.</li></ol></li><li>Return ?&nbsp;<emu-xref aoid="ToString" id="_ref_0"><a href="https://tc39.github.io/ecma262/#sec-tostring">ToString</a></emu-xref>(<var>proposal</var>).
+  </li></ol></emu-alg>
+</emu-clause><emu-annex id="sec-copyright-and-software-license">
+      <h1><span class="secnum">A</span>Copyright &amp; Software License</h1>
+      
+      <h2>Copyright Notice</h2>
+      <p>© 2019 Mike Samuel</p>
+
+      <h2>Software License</h2>
+      <p>All Software contained in this document ("Software") is protected by copyright and is being made available under the "BSD License", included below. This Software may be subject to third party rights (rights from parties other than Ecma International), including patent rights, and no licenses under such third party rights are granted under this license even if the third party concerned is a member of Ecma International. SEE THE ECMA CODE OF CONDUCT IN PATENT MATTERS AVAILABLE AT https://ecma-international.org/memento/codeofconduct.htm FOR INFORMATION REGARDING THE LICENSING OF PATENT CLAIMS THAT ARE REQUIRED TO IMPLEMENT ECMA INTERNATIONAL STANDARDS.</p>
+
+<p>Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:</p>
+
+<ol>
+  <li>Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.</li>
+  <li>Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.</li>
+  <li>Neither the name of the authors nor Ecma International may be used to endorse or promote products derived from this software without specific prior written permission.</li>
+</ol>
+
+<p>THIS SOFTWARE IS PROVIDED BY THE ECMA INTERNATIONAL "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ECMA INTERNATIONAL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</p>
+
+    </emu-annex>
+</div></body>
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index e3c99d7..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,2261 +0,0 @@
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diff --git a/package.json b/package.json
index 91f6f35..5e1bd1f 100644
--- a/package.json
+++ b/package.json
@@ -1,4 +1,5 @@
 {
+  "private": true,
   "name": "proposal-array-is-template-object",
   "version": "1.0.0",
   "description": "npm, I just want to run some tests",
@@ -7,6 +8,7 @@
     "test": "test"
   },
   "scripts": {
+    "build": "ecmarkup spec.emu > index.html",
     "test": "mocha"
   },
   "repository": {
@@ -21,6 +23,7 @@
   "homepage": "https://github.com/mikesamuel/proposal-array-is-template-object#readme",
   "devDependencies": {
     "chai": "^4.2.0",
+    "ecmarkup": "^3.16.0",
     "mocha": "^6.0.2",
     "pre-commit": "^1.2.2"
   },
diff --git a/spec.emu b/spec.emu
new file mode 100644
index 0000000..5040075
--- /dev/null
+++ b/spec.emu
@@ -0,0 +1,23 @@
+<!doctype html>
+<meta charset="utf8">
+<link rel="stylesheet" href="./spec.css">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/styles/github.min.css">
+<script src="./spec.js"></script>
+<pre class="metadata">
+title: Array.isTemplateObject
+stage: 0
+contributors: Mike Samuel
+</pre>
+
+<emu-clause id="sec-demo-clause">
+  <h1>This is an emu-clause</h1>
+  <p>This is an algorithm:</p>
+  <emu-alg>
+    1. Let _proposal_ be *undefined*.
+    1. If IsAccepted(_proposal_),
+      1. Let _stage_ be *0*.
+    1. Else,
+      1. Let _stage_ be *-1*.
+    1. Return ? ToString(_proposal_).
+  </emu-alg>
+</emu-clause>
