diff --git a/resources/tcrs.pptx b/resources/tcrs.pptx
index 02ff377..3b0747c 100644
Binary files a/resources/tcrs.pptx and b/resources/tcrs.pptx differ
diff --git a/spec/examples/mapml.png b/spec/examples/mapml.png
index 538e29d..dcdf674 100644
Binary files a/spec/examples/mapml.png and b/spec/examples/mapml.png differ
diff --git a/spec/index.html b/spec/index.html
index b6129f6..5666fc8 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -11,7 +11,8 @@
     <link rel="preload" as="style" href="https://www.w3.org/StyleSheets/TR/2016/cg-draft">
     <link rel="preconnect" href="https://respec.org">
     <link rel="preconnect" href="https://api.specref.org">
-    <!-- ReSpec config -->
+    <link rel="icon" href="https://www.w3.org/community/src/templates/wordpress/StoryTeller/favicon.ico" >
+<!-- ReSpec config -->
     <script src="https://www.w3.org/Tools/respec/respec-w3c" class="remove" async></script>
     <script class="remove">
       var respecConfig = {
@@ -20,23 +21,23 @@
         editors: [
           {
             name: "Peter Rushforth",
-            company: "Natural Resources Canada",
+            company: "Natural Resources Canada"
           },
           {
-            name: "Robert Linder",
-          },
+            name: "Robert Linder"
+          }
         ],
         authors: [
           {
             name: "Peter Rushforth",
-            company: "Natural Resources Canada",
+            company: "Natural Resources Canada"
           },
           {
-            name: "Robert Linder",
+            name: "Robert Linder"
           },
           {
-            name: "Joan Masó",
-          },
+            name: "Joan Masó"
+          }
         ],
         group: "maps4html",
         wgPublicList: "public-maps4html",
@@ -49,45 +50,45 @@
           "Web-Map-Custom-Element": {
             title: "Web Map Custom Element",
             href: "https://github.com/Maps4HTML/Web-Map-Custom-Element",
-            publisher: "W3C Maps for HTML Community Group",
+            publisher: "W3C Maps for HTML Community Group"
           },
           "MAPML-SCHEMA": {
             title: "MapML Schema",
             href: "https://github.com/Maps4HTML/MapML/tree/gh-pages/schema",
-            publisher: "Peter Rushforth. W3C Maps for HTML Community Group",
+            publisher: "Peter Rushforth. W3C Maps for HTML Community Group"
           },
           "EPSG-REGISTRY": {
             title: "EPSG Geodetic Parameter Dataset",
             href: "https://epsg.org/home.html",
-            publisher: "International Association of Oil ans Gas Producers",
+            publisher: "International Association of Oil ans Gas Producers"
           },
           "MapServer-MapML": {
             title: "MS RFC 123: Support for MapML output in MapServer",
             href: "https://mapserver.org/development/rfc/ms-rfc-123.html",
-            publisher: "The Open Source Geospatial Foundation",
+            publisher: "The Open Source Geospatial Foundation"
           },
           "GeoServer-MapML": {
             title: "GeoServer MapML Extension",
             href: "https://docs.geoserver.org/latest/en/user/extensions/mapml/index.html",
-            publisher: "W3C Maps for HTML Community Group",
+            publisher: "W3C Maps for HTML Community Group"
           },
           "GDAL-MapML" : {
             title: "GDAL MapML Driver",
             href: "https://gdal.org/drivers/vector/mapml.html",
-            publisher: "The Open Source Geospatial Foundation",
+            publisher: "The Open Source Geospatial Foundation"
           },
           "UCR-MapML-Matrix": {
             title: "MapML UCR Fulfillment Matrix",
             href: "https://maps4html.org/UCR-MapML-Matrix/mapml-ucrs-fulfillment-matrix.html",
-            publisher: "W3C Maps for HTML Community Group",
-          },
-        },
+            publisher: "W3C Maps for HTML Community Group"
+          }
+        }
       };
       respecConfig.otherLinks = [
         {
           key: "Join the Community Group",
-          data: [{ value: "Maps for HTML Community Group", href: "https://www.w3.org/community/maps4html/" }],
-        },
+          data: [{ value: "Maps for HTML Community Group", href: "https://www.w3.org/community/maps4html/" }]
+        }
       ];
     </script>
     <style>
@@ -319,7 +320,7 @@ <h3>Changes</h3>
               <li><time>2020-08-19</time>: Remove feature <code>type</code> property from IDL.</li>
               <li><time>2020-08-19</time>: Add <code>feature</code> element's <code>zoom</code> attribute.</li>
               <li><time>2020-08-19</time>: Update <a href="#the-feature-element"><code>feature</code></a> element's content model to reflect implementation.</li>
-              <li><time>2020-09-28</time>: Add <a href="#attr-map-controlslist"><code>controlslist</code></a> attribute to the <code>map</code> element.
+              <li><time>2020-09-28</time>: Add <a href="#attr-mapml-viewer-controlslist"><code>controlslist</code></a> attribute to the <code>map</code> element.
               <li><time>2021-03-01</time>: Update abstract to describe where MapML syntax and semantics fit into HTML.</li>
               <li><time>2021-03-01</time>: Update <a href="#implementation-experience">Implementation Experience</a>.</li>
               <li><time>2021-03-01</time>: Remove MicroXML references, update introduction to id MapML as an extension to HTML.</li>
@@ -339,6 +340,7 @@ <h3>Changes</h3>
               <li><time>2023-06-05</time>: Add initial draft spec for <code>mapml2geojson</code>().
               <li><time>2023-06-08</time>: Add initial draft WebIDL for <code>geojson2mapml</code>(). Add prose for <code>back</code>, <code>forward</code>, <code>reload</code>.
               <li><time>2023-06-12</time>: Add <code>HTMLGeometryChildElement</code> abstract interface
+              <li><time>2023-06-29</time>: Update Authoring section. Include definitions of local and remote content.
             </ol>
           </details>
         </section>
@@ -391,7 +393,7 @@ <h2 id="use-cases-and-requirements">Use Cases and Requirements</h2>
         <h2 id="web-maps">Web Maps</h2>
         
         <p>
-          A <dfn>Web map</dfn> is an embedded media element defined by
+          A <dfn>Web map</dfn> is an embedded interactive content widget defined by
           the <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element,
           in conjunction with any <a href="#the-map-caption-element"><code>map-caption</code></a> and
           <a href="#the-layer-element"><code>layer</code></a> element descendants.
@@ -410,23 +412,23 @@ <h4>The <code>&lt;<dfn id="the-mapml-viewer-element">mapml-viewer</dfn>&gt;</cod
         <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#embedded-content-2">Embedded content</a>.</dd>
         <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#interactive-content-2">Interactive content</a>.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-        <dd>Where <a href="https://html.spec.whatwg.org/multipage/dom.html#embedded-content-2">embedded content</a> is expected.</dd>
+        <dd>In <a href="#dfn-local-content">local HTML content</a>, where <a href="https://html.spec.whatwg.org/multipage/dom.html#embedded-content-2">embedded content</a> is expected.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
         <dd>Zero or more <a href="#the-layer-element"><code>layer</code></a> elements, preceded or followed by zero or one <a href="#the-map-caption-element"><code>map-caption</code></a> elements.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
         <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#global-attributes">Global attributes</a>.</dd>
-        <dd><code>zoom</code> — A non-negative integer zoom value.</dd>
-        <dd><code>lat</code> — A decimal degrees latitude value for the map center.</dd>
-        <dd><code>lon</code> — A decimal degrees longitude value for the map center.</dd>
-        <dd><code>projection</code> — A case-sensitive string 
+        <dd id="attr-mapml-viewer-zoom"><code>zoom</code> — A non-negative integer zoom value.</dd>
+        <dd id="attr-mapml-viewer-lat"><code>lat</code> — A decimal degrees latitude value for the map center.</dd>
+        <dd id="attr-mapml-viewer-lon"><code>lon</code> — A decimal degrees longitude value for the map center.</dd>
+        <dd id="attr-mapml-viewer-projection"><code>projection</code> — A case-sensitive string 
           <a href="#tiled-coordinate-reference-systems-table">identifier</a> of 
           the MapML coordinate reference system used by the map. The default if
           not present is <a href="#tcrs-OSMTILE"><code>OSMTILE</code></a>.</dd>
-        <dd><code>controls</code> — Show user agent controls.</dd>
-        <dd><code>controlslist</code> — Show/hide specific user agent controls.</dd>
-        <dd><code>width</code> — Horizontal dimension in pixels.</dd>
-        <dd><code>height</code> — Vertical dimension in pixels.</dd>
-        <dd><code>static</code> — Disable map interactivity.</dd>
+        <dd id="attr-mapml-viewer-controls"><code>controls</code> — Show user agent controls.</dd>
+        <dd id="attr-mapml-viewer-controlslist"><code>controlslist</code> — Show/hide specific user agent controls.</dd>
+        <dd id="attr-mapml-viewer-width"><code>width</code> — Horizontal dimension in pixels.</dd>
+        <dd id="attr-mapml-viewer-height"><code>height</code> — Vertical dimension in pixels.</dd>
+        <dd id="attr-mapml-viewer-static"><code>static</code> — Disable map interactivity.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-tag-omission">Tag omission in text/html</a>:</dt>
         <dd>Neither tag is omissible.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-accessibility-considerations">Accessibility considerations</a>:</dt>
@@ -524,20 +526,20 @@ <h4>The <code>&lt;<dfn id="the-mapml-viewer-element">mapml-viewer</dfn>&gt;</cod
           element, in conjunction with child <a href="#the-map-caption-element"><code>map-caption</code></a>
           and <a href="#the-layer-element"><code>layer</code></a> elements, defines a map media element.</p>
           
-        <p>The <dfn id="attr-map-zoom"><code>zoom</code></dfn> content attribute 
+        <p>The <a href="#attr-mapml-viewer-zoom"><code>zoom</code></a> content attribute 
           indirectly identifies an initial scale of the map.</p>
         <p>The <a href="#dom-htmlmapmlviewerelement-zoom"><code>zoom</code></a> 
           IDL attribute must 
           <a href="https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#reflect">reflect</a> 
           the content attribute of the same name.</p>
         
-        <p>The <dfn id="attr-map-lat"><code>lat</code></dfn> and <dfn id="attr-map-lon"><code>lon</code></dfn> content attributes locate the initial center of the map.</p>
+        <p>The <a href="#attr-mapml-viewer-lat"><code>lat</code></a> and <a href="#attr-mapml-viewer-lon"><code>lon</code></a> content attributes locate the initial center of the map.</p>
         <p>The <a href="#dom-htmlmapmlviewerelement-lat"><code>lat</code></a> and <a href="#dom-htmlmapmlviewerelement-lon"><code>lon</code></a> IDL attributes must <a href="https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#reflect">reflect</a> the content attribute of the same name.</p>
         <p class="note"><em>The <a href="#dom-htmlmapmlviewerelement-lat"><code>lat</code></a>, <a href="#dom-htmlmapmlviewerelement-lon"><code>lon</code></a> and <a href="#dom-htmlmapmlviewerelement-zoom"><code>zoom</code></a> attributes have no dynamic effect (they only control the default initial state of the element).</em></p>
 
-        <p>The location and zoom level of the map created with the <code>mapml-viewer</code> element can be dynamically changed via the <code>zoomTo()</code> API method, which will also change the <code>zoom</code>, <code>lat</code> and <code>lon</code> attributes.</p>
+        <p>The location and zoom level of the map created with the <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element can be dynamically changed via the <a href="#dom-htmlmapmlviewerelement-zoomto"><code>zoomTo()</code></a> API method, which will also change the <a href="#dom-htmlmapmlviewerelement-zoom"><code>zoom</code></a>, <a href="#dom-htmlmapmlviewerelement-lat"><code>lat</code></a> and <a href="#dom-htmlmapmlviewerelement-lon"><code>lon</code></a> attributes.</p>
 
-        <p>The <dfn id="attr-map-controls" class="lint-ignore"><code>controls</code></dfn> attribute is a <a href="https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If present, it indicates that the author has not provided scripted controls and would like the user agent to provide its own set of controls.</p>
+        <p>The <a href="#attr-mapml-viewer-controls"><code>controls</code></a> attribute is a <a href="https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If present, it indicates that the author has not provided scripted controls and would like the user agent to provide its own set of controls.</p>
         <!-- https://html.spec.whatwg.org/multipage/media.html#user-interface -->
         <p>
           If the attribute is present,
@@ -555,59 +557,60 @@ <h4>The <code>&lt;<dfn id="the-mapml-viewer-element">mapml-viewer</dfn>&gt;</cod
         </p>
         <p>The <a href="#dom-htmlmapmlviewerelement-controls"><code>controls</code></a> IDL attribute must <a href="https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#reflect">reflect</a> the content attribute of the same name.</p>
         
-        <p>The <dfn id="attr-map-controlslist"><code>controlslist</code></dfn> attribute, when specified, helps the user agent select what controls to show on the media element whenever the user agent shows its own set of controls.
+        <p>The <a href="#attr-mapml-viewer-controlslist"><code>controlslist</code></a> attribute, when specified, helps the user agent select what controls to show on the media element whenever the user agent shows its own set of controls.
           Its value must be an <a href="https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens">unordered set of unique space-separated tokens</a> that are <a href="https://infra.spec.whatwg.org/#ascii-case-insensitive">ASCII case-insensitive</a>.
-          The allowed values are
-          <dfn id="attr-map-controlslist-nofullscreen"><code>nofullscreen</code></dfn>,
-          <dfn id="attr-map-controlslist-nolayer"><code>nolayer</code></dfn>,
-          <dfn id="attr-map-controlslist-noreload"><code>noreload</code></dfn>,
-          <dfn id="attr-map-controlslist-nozoom"><code>nozoom</code></dfn>,
-          <dfn id="attr-map-controlslist-noscale"><code>noscale</code></dfn>, and 
-          <dfn id="attr-map-controlslist-geolocation"><code>geolocation</code></dfn>.
+          
+<p>The <a href="#dom-htmlmapmlviewerelement-controlslist"><code>controlsList</code></a> IDL attribute must <a href="https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#reflect">reflect</a> the value of the <a href="#attr-mapml-viewer-controlslist"><code>controlslist</code></a> content attribute.</p>
+
+<p>The <a href="https://dom.spec.whatwg.org/#concept-supported-tokens">supported tokens</a> for <a href="#dom-htmlmapmlviewerelement-controlslist"><code>controlsList</code></a>'s <a href="https://dom.spec.whatwg.org/#interface-domtokenlist">DOMTokenList</a> are the allowed values of the <a href="#attr-mapml-viewer-controlslist"><code>controlslist</code></a> attribute and supported by the user agent. The allowed values are
+          <a href="#attr-mapml-viewer-controlslist-nofullscreen"><code>nofullscreen</code></a>,
+          <a href="#attr-mapml-viewer-controlslist-nolayer"><code>nolayer</code></a>,
+          <a href="#attr-mapml-viewer-controlslist-noreload"><code>noreload</code></a>,
+          <a href="#attr-mapml-viewer-controlslist-nozoom"><code>nozoom</code></a>,
+          <a href="#attr-mapml-viewer-controlslist-noscale"><code>noscale</code></a>, and 
+          <a href="#attr-mapml-viewer-controlslist-geolocation"><code>geolocation</code></a>.
         </p>
           
-        <p>The <a href="#attr-map-controlslist-nofullscreen"><code>nofullscreen</code></a> keyword hints that the fullscreen mode control should be hidden when using the user agent's own set of controls for the media element.</p>
-        <p>The <a href="#attr-map-controlslist-nolayer"><code>nolayer</code></a> keyword hints that the layer control should be hidden when using the user agent's own set of controls for the media element.</p>
-        <p>The <a href="#attr-map-controlslist-noreload"><code>noreload</code></a> keyword hints that the reload control should be hidden when using the user agent's own set of controls for the media element.</p>
-        <p>The <a href="#attr-map-controlslist-nozoom"><code>nozoom</code></a> keyword hints that the zoom controls should be hidden when using the user agent's own set of controls for the media element.</p>
-        <p>The <a href="#attr-map-controlslist-noscale"><code>noscale</code></a> keyword hints that the scalebar control should be hidden when using the user agent's own set of controls for the media element.</p>
-        <p>The <a href="#attr-map-controlslist-geolocation"><code>geolocation</code></a> 
+        <p>The <dfn id="attr-mapml-viewer-controlslist-nofullscreen"><code>nofullscreen</code></dfn> keyword hints that the fullscreen mode control should be hidden when using the user agent's own set of controls for the media element.</p>
+        <p>The <dfn id="attr-mapml-viewer-controlslist-nolayer"><code>nolayer</code></dfn> keyword hints that the layer control should be hidden when using the user agent's own set of controls for the media element.</p>
+        <p>The <dfn id="attr-mapml-viewer-controlslist-noreload"><code>noreload</code></dfn> keyword hints that the reload control should be hidden when using the user agent's own set of controls for the media element.</p>
+        <p>The <dfn id="attr-mapml-viewer-controlslist-nozoom"><code>nozoom</code></dfn> keyword hints that the zoom controls should be hidden when using the user agent's own set of controls for the media element.</p>
+        <p>The <dfn id="attr-mapml-viewer-controlslist-noscale"><code>noscale</code></dfn> keyword hints that the scalebar control should be hidden when using the user agent's own set of controls for the media element.</p>
+        <p>The <dfn id="attr-mapml-viewer-controlslist-geolocation"><code>geolocation</code></dfn> 
         keyword hints that a control to allow the user to enable client-side representation 
         of the user agent's location should be presented.  Triggering the control 
         should invoke an interaction to obtain a time-limited 
         <a href="https://www.w3.org/TR/permissions/#dfn-express-permission">express 
-        permission</a> [permissions] to display the user agent's location on the viewer.</p>
+        permission</a> [[permissions]] to display the user agent's location on the viewer.</p>
         
         <p class="note"><em>Hiding these aspects of the user agent's own controls does not necessarily disable the related functionality. For example, the user agent might present the same functionality through a context menu or keyboard shortcut.</em></p>
         
-        <p>The <a href="#dom-htmlmapmlviewerelement-controlslist"><code>controlsList</code></a> IDL attribute must <a href="https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#reflect">reflect</a> the value of the <a href="#attr-map-controlslist"><code>controlslist</code></a> content attribute.</p>
         
-        <p>The <a href="https://dom.spec.whatwg.org/#concept-supported-tokens">supported tokens</a> for <a href="#dom-htmlmapmlviewerelement-controlslist"><code>controlsList</code></a>'s <a href="https://dom.spec.whatwg.org/#interface-domtokenlist">DOMTokenList</a> are the allowed values defined in the <a href="#attr-map-controlslist"><code>controlslist</code></a> attribute and supported by the user agent.</p>
         
         <p>A user agent MAY ignore the author's preference when it makes sense.</p>
         
-        <p class="note">A user agent might ignore the <a href="#attr-map-controlslist-nofullscreen"><code>nofullscreen</code></a> keyword if the content area containing the map is small, such as on a mobile device.</p>
+        <p class="note">A user agent might ignore the <a href="#attr-mapml-viewer-controlslist-nofullscreen"><code>nofullscreen</code></a> keyword if the content area containing the map is small, such as on a mobile device.</p>
         
-        <p>The <dfn id="attr-map-projection" class="lint-ignore"><code>projection</code></dfn> 
+        <p>The <a href="#attr-mapml-viewer-projection" class="lint-ignore"><code>projection</code></a> 
           attribute value identifies the tiled coordinate reference system for 
           the <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a>
           and the fallback tiled coordinate reference system for its content 
           <a href="the-layer-element"><code>layer</code></a> elements. 
           Layers share the projection declared by their parent 
           <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> 
-          either by using the fallback <a href="#attr-map-projection"><code>
+          either by using the fallback <a href="#attr-mapml-viewer-projection"><code>
           projection</code></a> value from the parent, or via an optional child 
           <a href="#the-meta-element"><code>meta</code></a>
           element specifying the <code>projection</code> via that element's 
           <code>name</code> and <code>content</code> attribute values. 
-          The default value of the <a href="#attr-map-projection"><code>
+          The default value of the <a href="#attr-mapml-viewer-projection"><code>
           projection</code></a>, if the content attribute is not present, is 
           <a href="#tcrs-OSMTILE"><code>OSMTILE</code></a>.
           The complete set of defined tiled coordinate reference systems can be found in the
         <a href="#tiled-coordinate-reference-systems-table">Tiled Coordinate Reference Systems</a> table.
         </p>
         
-        <p>The <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element supports the <dfn id="attr-map-width"><code>width</code></dfn> and <dfn id="attr-map-height"><code>height</code></dfn> <a href="https://html.spec.whatwg.org/multipage/embedded-content-other.html#dimension-attributes">dimension attributes</a>. [[HTML]]</p>
+        <p>The <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element supports the <a href="#attr-mapml-viewer-width"><code>width</code></a> and <a href="#attr-mapml-viewer-height"><code>height</code></a> <a href="https://html.spec.whatwg.org/multipage/embedded-content-other.html#dimension-attributes">dimension attributes</a>. [[HTML]]</p>
         <p>The <a href="https://drafts.csswg.org/css-images/#default-object-size">default object size</a> is a width of 300 <a href="https://drafts.csswg.org/css-values/#px">CSS pixels</a> and a height of 150 <a href="https://drafts.csswg.org/css-values/#px">CSS pixels</a>. [[css-images-3]]</p>
         
         <p>
@@ -801,7 +804,7 @@ <h4>The <code>&lt;<dfn id="the-map-caption-element">map-caption</dfn>&gt;</code>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
         <dd>None.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-        <dd>As the first or last child of a <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element.</dd>
+        <dd>In <a href="#dfn-local-content">local HTML content</a>, as the first or last child of a <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
         <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#phrasing-content-2">Phrasing content</a>.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -858,7 +861,7 @@ <h4>The <code>&lt;<dfn id="the-layer-element">layer</dfn>&gt;</code> element</h4
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
         <dd>None.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-        <dd>As a child of the <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element.</dd>
+        <dd>In <a href="#dfn-local-content">local HTML content</a>, as a child of the <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element.</dd>
         <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
         <dd>If the <a href="#attr-layer-src"><code>src</code></a> attribute is present: <a href="https://html.spec.whatwg.org/multipage/dom.html#concept-content-nothing">Nothing</a>. 
         If no <a href="#attr-layer-src"><code>src</code></a> attribute is present: 
@@ -1028,35 +1031,68 @@ <h4>The <code>&lt;<dfn id="the-layer-element">layer</dfn>&gt;</code> element</h4
       <section class="informative">
         <h3 id="authoring">Authoring</h3>
         
-        <p>
-          A <a href="#dfn-web-map">Web map</a> is a rectangular page area,
-          represented in HTML in the form of a
-          <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element,
-          containing a set of zero or more
-          <a href="#the-layer-element"><code>layer</code></a> elements, with an
-          optional accessible name assigned by a first or last child 
-          <a href="#the-map-caption-element"><code>map-caption</code></a> element.
-          Map layers are drawn in document order of the
-          <a href="#the-layer-element"><code>layer</code></a> elements,
-          following the SVG
-          <a href="https://www.w3.org/TR/SVG/render.html#PaintersModel">painters model</a>.
-          If the author enables, via the  <a href="#the-layer-element"><code>layer</code></a> 
-          <a href="#attr-layer-checked"><code>checked</code></a> attribute, more than one layer,
-          all the layers will be painted, in document order.
-          Features in layers drawn earlier will be painted over by later layers.
-        </p>
-        
-        <p>
-          A map's initial location
-          (<a href="#attr-map-lat"><code>lat</code></a>,
-          <a href="#attr-map-lon"><code>lon</code></a>),
-          extent
-          (<a href="#attr-map-width"><code>width</code></a>,
-          <a href="#attr-map-height"><code>height</code></a>)
-          and scale
-          (<a href="#attr-map-zoom"><code>zoom</code></a>)
-          are defined by its attributes.
-        </p>
+          <p>A <a href="#dfn-web-map">Web map</a> is a rectangular viewport on a page, established in HTML by the 
+          <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> element, with 
+          an optional accessible name for the rendered map, which is assigned by a child 
+          <a href="#the-map-caption-element"><code>map-caption</code></a> element.</p>  
+
+          <p>A map's initial location is defined by the 
+          <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> 
+          <a href="#attr-mapml-viewer-lat"><code>lat</code></a> and 
+          <a href="#attr-mapml-viewer-lon"><code>lon</code></a> attributes. A map's initial display 
+          scale is approximately defined by the 
+          <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a>'s 
+          <a href="#attr-mapml-viewer-zoom"><code>zoom</code></a> attribute, while the spatial extent 
+          of a map is defined by its <a href="#attr-mapml-viewer-lat"><code>lat</code></a>, 
+          <a href="#attr-mapml-viewer-lon"><code>lon</code></a> and 
+          <a href="#attr-mapml-viewer-zoom"><code>zoom</code></a> attributes, and its rendered 
+          viewport size in defined in CSS pixels.</p>
+
+          <p>In addition to <a href="#the-map-caption-element"><code>map-caption</code></a>, 
+          a <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> also contains
+          a set of zero or more <a href="#the-layer-element"><code>layer</code></a> elements. 
+          Map layers are drawn in document order of the <a href="#the-layer-element"><code>layer</code></a> 
+          elements, following the SVG painters model. If the author enables more than one 
+          <a href="#the-layer-element"><code>layer</code></a>, via the 
+          <a href="#the-layer-element"><code>layer</code></a>s' <code>checked</code> 
+          attribute,  all the <code>checked</code> layers will be rendered, in document order.</p>  
+
+          <p>A <a href="#the-mapml-viewer-element"><code>mapml-viewer</code></a> optionally 
+            displays a set of user controls, based on the viewer's <a href="#attr-mapml-viewer-controls"><code>controls</code></a> and 
+            <a href="#attr-mapml-viewer-controlslist"><code>controlslist</code></a> attributes.  User controls may include a dialog for 
+          controlling the appearance and order of map layers.  The appearance of each map 
+          <a href="#the-layer-element"><code>layer</code></a> in the layer control dialog 
+          includes the accessible name of the <a href="#the-layer-element"><code>layer</code></a>, 
+          which is set by the map author.</p>
+
+          <p>The set of map viewer controls is under control of the HTML author.  The arrangement, 
+          appearance and accessibility of the controls is managed by the user agent. While
+          it is possible to replace or augment the set of controls and their arrangement, 
+          it is not recommended to do so, since such changes will necessarily change the 
+          accessibility and usability of the map for users.</p> 
+          
+          <h4>Local and remote content</h4>
+          
+          <p>Map layers are created and managed with the <a href="#the-layer-element"><code>layer</code></a> 
+          element.  The <a href="#the-layer-element"><code>layer</code></a> element represents 
+          map content by one of two mechanisms.  The first mechanism is as the child or descendant content of the 
+          <a href="#the-layer-element"><code>layer</code></a> element directly.  This 
+          configuration of content is called <dfn id="dfn-local-content">local content</dfn> throughout this specification. 
+          The second mechanism for representing map content is by URL reference; this 
+          content configuration is called <dfn id="dfn-remote-content">remote content</dfn>, and the content is referenced via 
+          the <a href="#the-layer-element"><code>layer</code></a> <a href="#attr-layer-src"><code>src</code></a> 
+          attribute. <a href="#the-layer-element"><code>layer</code></a> element content 
+          may be local or remote, but a <a href="#the-layer-element"><code>layer</code></a> 
+          element may not have both <a href="#dfn-local-content">local content</a> and <a href="#dfn-remote-content">remote content</a>; if a 
+          <a href="#the-layer-element"><code>layer</code></a> element has both <a href="#dfn-local-content">local content</a>
+          and a <a href="#attr-layer-src"><code>src</code></a> attribute, the (which one?) 
+          will be ignored.  In the element descriptions of this document, each contains a 
+          "Contexts in which this element can be used" section.  The terms "<a href="#dfn-local-content">local content</a>" 
+          and "<a href="#dfn-remote-content">remote content</a>" in that section is intended to describe the appropriate 
+          authoring context of the element according to the above definition of local and 
+          remote content.  Local and remote content serve different use cases: local content
+          can be interactive, and DOM-accessible, while remote content is rendered, but 
+          not interactive, nor accessible to JavaScript or CSS.</p>
         
         <section>
           <h4>Examples</h4>
@@ -1067,7 +1103,8 @@ <h4>Examples</h4>
             [[Web-Map-Custom-Element]]
           </p>
           
-          <aside class="example">
+          <h4>Local content</h4>
+          <aside class="example" title="Example using local content">
             <p>
               A basic map of Paris:
             </p>
@@ -1075,18 +1112,27 @@ <h4>Examples</h4>
             <iframe class="authoring-example" title="Authoring example 1" src="examples/map-1.html" width="300" height="150" loading="lazy"></iframe>
           
             <p>
-              This map can be created with the following markup:
+              This map can be created with the following markup that demonstrates <a href="#dfn-local-content">local content</a>:
             </p>
             
             <pre>
               &lt;mapml-viewer zoom="11" lat="48.8566" lon="2.3522"&gt;
                 &lt;map-caption&gt;Paris, the City of Lights&lt;/map-caption&gt;
-                &lt;layer src="https://example.com/mapml/osm/" checked crossorigin&gt;&lt;/layer&gt;
+                &lt;layer checked&gt;
+                  &lt;map-link rel="license" href="https://www.openstreetmap.org/copyright" title="© OpenStreetMap contributors CC BY-SA"/&gt;
+                  &lt;map-extent units="OSMTILE" &gt;
+                    &lt;map-input name="z" type="zoom"  value="18" min="0" max="18"&gt;&lt;/map-input&gt;
+                    &lt;map-input name="x" type="location" units="tilematrix" axis="column"&gt;&lt;/map-input&gt;
+                    &lt;map-input name="y" type="location" units="tilematrix" axis="row"&gt;&lt;/map-input&gt;
+                    &lt;map-link rel="tile" tref="https://tile.openstreetmap.org/{z}/{x}/{y}.png" /&gt;
+                  &lt;/map-extent&gt;
+                &lt;/layer&gt;
               &lt;/mapml-viewer&gt;
             </pre>
           </aside>
           
-          <aside class="example">
+          <h4>Remote content</h4>          
+          <aside class="example" title="Example using remote content">
             <p>
               A map of Ottawa,
               with default and non-default controls enabled, and dimensions specified:
@@ -1095,7 +1141,7 @@ <h4>Examples</h4>
             <iframe class="authoring-example" title="Authoring example 2" src="examples/map-2.html" width="600" height="350" loading="lazy"></iframe>
           
             <p>
-              This map can be created with the following markup:
+              This map can be created with the following markup that demonstrates <a href="#dfn-remote-content">remote content</a>:
             </p>
             
             <pre>
@@ -1104,6 +1150,25 @@ <h4>Examples</h4>
                 &lt;layer label="Canada Base Map - Transportation (CBMT)" src="https://example.com/mapml/cbmt/" checked crossorigin&gt;&lt;/layer&gt;
               &lt;/mapml-viewer&gt;
             </pre>
+            <p>The document that is found at the <code>src</code> URL above has content MIME media type "text/mapml" and is as follows:</p>
+            <pre>
+              &lt;mapml- xmlns="http://www.w3.org/1999/xhtml"&gt;
+                &lt;map-head&gt;
+                  &lt;map-title&gt;Canada Base Map - Transportation (CBMT)&lt;/map-title&gt;
+                  &lt;map-meta http-equiv="Content-Type" content="text/mapml;charset=UTF-8"&gt;&lt;/map-meta&gt;
+                  &lt;map-meta charset="utf-8"&gt;&lt;/map-meta&gt;
+                  &lt;map-link rel="license" href="https://www.nrcan.gc.ca/earth-sciences/geography/topographic-information/free-data-geogratis/licence/17285" title="Canada Base Map © Natural Resources Canada"&gt;&lt;/map-link&gt;
+                &lt;/map-head&gt;
+                &lt;map-body&gt;
+                  &lt;map-extent units="CBMTILE"&gt;
+                    &lt;map-input name="z" type="zoom" value="17" min="0" max="17"&gt;&lt;/map-input&gt;
+                    &lt;map-input name="y" type="location" units="tilematrix" axis="row"&gt;&lt;/map-input&gt;
+                    &lt;map-input name="x" type="location" units="tilematrix" axis="column"&gt;&lt;/map-input&gt;
+                    &lt;map-link rel="tile" tref="https://geoappext.nrcan.gc.ca/arcgis/rest/services/BaseMaps/CBMT3978/MapServer/tile/{z}/{y}/{x}"&gt;&lt;/map-link&gt;
+                  &lt;/map-extent&gt;
+                &lt;/map-body&gt;
+              &lt;/mapml-&gt;
+            </pre>
           </aside>
         </section>
       </section>
@@ -1120,6 +1185,19 @@ <h4 id="coordinate-systems">Coordinate Systems</h4>
           conforming to this specification, we override any externally defined axis order. Coordinates are serialized as <i>horizontal axis followed by vertical axis</i>, separated by whitespace. Where applicable, coordinate pairs are
           separated by whitespace. The axis names of a coordinate system are identified by this document.
         </p>
+        <aside class="example" title="Relations between coordinate systems, coordinate reference systems and viewport">
+          <figure>
+            <a href="examples/mapml.png" style="cursor:zoom-in;">
+              <img src="examples/mapml.png" width="3240" height="2016" loading="lazy" alt="Origins, orientations and axis names of tcrs, pcrs, gcrs, tilematrix, map, and tile coordinate systems">
+            </a>
+            <figcaption>
+            Prototype MapML services are available,
+            representing
+            <a href="https://geogratis.gc.ca/mapml/en/osmtile/cbmt/">tiled</a>
+            and vector data.
+            </figcaption>
+          </figure>
+        </aside>
         </section>
         <section>
         <h4 id="coordinate-reference-systems">Coordinate Reference Systems</h4>
@@ -1545,7 +1623,7 @@ <h5>The <code>&lt;<dfn id="the-mapml-element">mapml</dfn>&gt;</code> element</h5
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd>None.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>The root of a MapML document.</dd>
+          <dd>The root of a <a href="#remote-content">remote content</a>-MapML document.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd>One <a href="#the-head-element"><code>head</code></a> element, followed by one <a href="#the-body-element"><code>body</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -1601,7 +1679,7 @@ <h5>The <code>&lt;<dfn id="the-head-element">head</dfn>&gt;</code> element</h5>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd>None.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>As the first child element of the <a href="#the-mapml-element"><code>mapml</code></a> element.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as the first child element of the <a href="#the-mapml-element"><code>mapml</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd>One or more elements of metadata content, of which exactly one is a <code>title</code> element and no more than one is a <code>base</code> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -1659,7 +1737,8 @@ <h5>The <code>&lt;<dfn id="the-title-element">title</dfn>&gt;</code> element</h5
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#metadata-content-2">Metadata content</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>As a child of the <a href="#the-head-element"><code>head</code></a> element.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as a child of the <a href="#the-head-element"><code>head</code></a> element.</dd>
+          <dd>In <a href="#dfn-local-content">local content</a>, as a child of the <a href="#the-layer-element"><code>layer</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#text-content">Text</a> that is not <a href="https://html.spec.whatwg.org/multipage/dom.html#inter-element-whitespace">inter-element whitespace</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -1717,7 +1796,8 @@ <h5>The <code>&lt;<dfn id="the-base-element">base</dfn>&gt;</code> element</h5>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#metadata-content-2">Metadata content</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>As a child element of the <a href="#the-head-element"><code>head</code></a> element.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as a child element of the <a href="#the-head-element"><code>head</code></a> element.</dd>
+          <dd>In <a href="#dfn-local-content">local content</a>, as a child of the <a href="#the-layer-element"><code>layer</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-content-nothing">Nothing</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -1776,7 +1856,8 @@ <h5>The <code>&lt;<dfn id="the-meta-element">meta</dfn>&gt;</code> element</h5>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#metadata-content-2">Metadata content</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>In the <a href="#the-head-element"><code>head</code></a> element.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as a child element of the <a href="#the-head-element"><code>head</code></a> element.</dd>
+          <dd>In <a href="#dfn-local-content">local content</a>, as a child of the <a href="#the-layer-element"><code>layer</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-content-nothing">Nothing</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -1836,8 +1917,8 @@ <h5>The <code>&lt;<dfn id="the-link-element">link</dfn>&gt;</code> element</h5>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#metadata-content-2">Metadata content</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>If the element represents a hyperlink (has a <code>href</code> attribute): as a child of the <a href="#the-head-element"><code>head</code></a> or <a href="#the-body-element"><code>body</code></a> element.</dd>
-          <dd>If the element represents a link template (has a <code>tref</code> attribute): as a child of the <a href="#the-extent-element"><code>extent</code></a> element.</dd>
+          <dd>If the element represents a hyperlink (has a <code>href</code> attribute): In <a href="#dfn-local-content">local content</a>, as a child of the <a href="#the-layer-element"><code>layer</code></a> element; in <a href="#dfn-remote-content">remote content</a>, as a child of the <a href="#the-head-element"><code>head</code></a> or <a href="#the-body-element"><code>body</code></a> element.</dd>
+          <dd>If the element represents a link template (has a <code>tref</code> attribute): As a child of the <a href="#the-extent-element"><code>extent</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-content-nothing">Nothing</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -2019,7 +2100,7 @@ <h5>The <code>&lt;<dfn id="the-body-element">body</dfn>&gt;</code> element</h5>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/sections.html#sectioning-root">Sectioning root</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>As the second child of the <a href="#the-mapml-element"><code>mapml</code></a> element.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as the second child of the <a href="#the-mapml-element"><code>mapml</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd>Features and metadata.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -2074,7 +2155,8 @@ <h5>The <code>&lt;<dfn id="the-extent-element">extent</dfn>&gt;</code> element</
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#metadata-content-2">Metadata content</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>A child of the <a href="#the-body-element"><code>body</code></a> element when loaded over the network, or a child of the <a href="#the-layer-element"><code>layer</code></a> element when loaded inline.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as a child of the <a href="#the-head-element"><code>head</code></a> element.</dd>
+          <dd>In <a href="#dfn-local-content">local content</a>, as a child of the <a href="#the-layer-element"><code>layer</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd>
             A set of multiple <a href="#the-input-element"><code>input</code></a> and one or more <a href="#the-link-element"><code>link</code></a> elements with their <code>rel</code> attribute in either the "<a href="#link-rel-tile"><code>tile</code></a>", "<a href="#link-rel-image"><code>image</code></a>" or "<a href="#link-rel-features"><code>features</code></a>" state, and zero or one
@@ -2470,65 +2552,6 @@ <h2><code>input</code>@<code>axis</code> values</h2>
         </div>
         </section>
         <section>
-        <h5>The <code>&lt;<dfn id="the-label-element" class="lint-ignore">label</dfn>&gt;</code> element</h5>
-        <dl class="def">
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
-          <dd>N/A.</dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>
-            As a child of the <a href="#the-extent-element"><code>extent</code></a> element.
-          </dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
-          <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#phrasing-content-2">Phrasing content</a>.</dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
-          <dd><code>for</code> — Identifies by id reference the select for which the content of this element is the label.</dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-accessibility-considerations">Accessibility considerations</a>:</dt>
-          <dd>
-            <details class="a11y-details">
-              <summary>For authors</summary>
-              <div class="table-responsive">
-              <table class="def">
-                <thead>
-                  <tr>
-                    <th>Implicit ARIA semantics</th>
-                    <th>ARIA roles, states and properties which MAY be used</th>
-                  </tr>
-                </thead>
-                <tbody>
-                  <tr>
-                    <th>
-                      <a href="https://www.w3.org/TR/html-aria/#dfn-no-corresponding-role">No corresponding <code>role</code></a>
-                    </th>
-                    <td>
-                      <p><strong>No <code>role</code> or <code>aria-*</code> attributes</strong>.</p>
-                    </td>
-                  </tr>
-                </tbody>
-              </table>
-              </div>
-            </details>
-          </dd>
-          <dd>
-            <details class="a11y-details">
-              <summary>For implementers</summary>
-              <div class="issue" data-number="165"><!-- empty comment to avoid generating more than the GH issue's title --></div>
-            </details>
-          </dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-dom">DOM interface</a>:</dt>
-          <dd></dd>
-          <dd>
-            <pre class="idl">
-            [Exposed=Window]
-            interface HTMLLabelElement : HTMLElement {
-              [HTMLConstructor] constructor();
-              
-              attribute DOMString for;
-            };
-            </pre>
-          </dd>
-        </dl>
-        </section>
-        <section>
         <h5>The <code>&lt;<dfn id="the-select-element">select</dfn>&gt;</code> element</h5>
         <dl class="def">
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
@@ -2658,7 +2681,8 @@ <h5>The <code>&lt;<dfn id="the-tile-element">tile</dfn>&gt;</code> element</h5>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd>Feature data.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>Child of the <a href="#the-body-element"><code>body</code></a> element.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as a child of the <a href="#the-body-element"><code>body</code></a> element.</dd>
+          <dd>In <a href="#dfn-local-content">local content</a>, as a child of the <a href="#the-layer-element"><code>layer</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-content-nothing">Nothing</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
@@ -2731,73 +2755,18 @@ <h5>The <code>&lt;<dfn id="the-tile-element">tile</dfn>&gt;</code> element</h5>
         </p>
         </section>
         <section>
-        <h5>The <code>&lt;<dfn id="the-image-element">image</dfn>&gt;</code> element</h5>
-        <dl class="def">
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
-          <dd>Feature data.</dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>A child of the <a href="#the-feature-element"><code>feature</code></a> element, which has a sibling <code>bbox</code> element.</dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
-          <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-content-nothing">Nothing</a>.</dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
-          <dd><code>src</code> — Address of the hyperlink.</dd>
-          <dd><code>type</code> — A hint as to the MIME type of the resource.</dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-accessibility-considerations">Accessibility considerations</a>:</dt>
-          <dd>
-            <details class="a11y-details">
-              <summary>For authors</summary>
-              <div class="table-responsive">
-              <table class="def">
-                <thead>
-                  <tr>
-                    <th>Implicit ARIA semantics</th>
-                    <th>ARIA roles, states and properties which MAY be used</th>
-                  </tr>
-                </thead>
-                <tbody>
-                  <tr>
-                    <th>
-                      <a href="https://www.w3.org/TR/html-aria/#dfn-no-corresponding-role">No corresponding <code>role</code></a>
-                    </th>
-                    <td>
-                      <p><strong>No <code>role</code> or <code>aria-*</code> attributes</strong>.</p>
-                    </td>
-                  </tr>
-                </tbody>
-              </table>
-              </div>
-            </details>
-          </dd>
-          <dd>
-            <details class="a11y-details">
-              <summary>For implementers</summary>
-              <div class="issue" data-number="165"><!-- empty comment to avoid generating more than the GH issue's title --></div>
-            </details>
-          </dd>
-          <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-dom">DOM interface</a>:</dt>
-          <dd>
-            <pre class="idl">
-            [Exposed=Window]
-            interface HTMLImageElement : HTMLElement {
-              [HTMLConstructor] constructor();
-            };
-            </pre>
-          </dd>
-        </dl>
-        </section>
-        <section>
         <h5>The <code>&lt;<dfn id="the-feature-element">feature</dfn>&gt;</code> element</h5>
         <dl class="def">
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-categories">Categories</a>:</dt>
           <dd>Feature data.</dd>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#interactive-content-2">Interactive content</a>.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-contexts">Contexts in which this element can be used</a>:</dt>
-          <dd>Child of the <a href="#the-body-element"><code>body</code></a> element.</dd>
+          <dd>In <a href="#dfn-remote-content">remote content</a>, as a child of the <a href="#the-body-element"><code>body</code></a> element.</dd>
+          <dd>In <a href="#dfn-local-content">local content</a>, as a child of the <a href="#the-layer-element"><code>layer</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-content-model">Content model</a>:</dt>
           <dd>Optional <a href="#the-featurecaption-element"><code>featurecaption</code></a> element, 
             optional <a href="#the-geometry-element"><code>geometry</code></a> element, 
-            optional <a href="#the-properties-element"><code>properties</code></a> element,
-            optional <a href="#the-image-element"><code>image</code></a> element.</dd>
+            optional <a href="#the-properties-element"><code>properties</code></a> element.</dd>
           <dt><a href="https://html.spec.whatwg.org/multipage/dom.html#concept-element-attributes">Content attributes</a>:</dt>
           <dd><a href="https://html.spec.whatwg.org/multipage/dom.html#global-attributes">Global attributes</a>.</dd>
           <dd><code>zoom</code> — the 'native' zoom level of the feature geometry.</dd>
@@ -3234,32 +3203,6 @@ <h5>The <code>&lt;<dfn id="the-coordinates-element">coordinates</dfn>&gt;</code>
         </section>
         </section>
         
-        <section class="informative">
-        <h3>Authoring</h3>
-        <p>
-        While MapML is human-readable and can be written by hand,
-        authors typically will use conversion programs
-        and other specialized software tools to generate MapML.
-        </p>
-        
-        <section>
-        <h4 id="examples">Examples</h4>
-          <aside class="example">
-            <figure>
-              <a href="examples/mapml.png" style="cursor:zoom-in;">
-                <img src="examples/mapml.png" width="3240" height="2016" loading="lazy" alt="Origins, orientations and axis names of tcrs, pcrs, gcrs, tilematrix, map, and tile coordinate systems">
-              </a>
-              <figcaption>
-              Prototype MapML services are available,
-              representing
-              <a href="https://geogratis.gc.ca/mapml/en/osmtile/cbmt/">tiled</a>
-              and vector data.
-              </figcaption>
-            </figure>
-          </aside>
-        </section>
-        </section>
-        
         <section>
         <h2 id="styling">Styling</h2>
         <p>MapML documents can be styled with Cascading Style Sheets.</p>