[html5] r1255 - /

whatwg at whatwg.org whatwg at whatwg.org
Tue Feb 26 16:24:15 PST 2008


Author: ianh
Date: 2008-02-26 16:24:14 -0800 (Tue, 26 Feb 2008)
New Revision: 1255

Modified:
   index
   source
Log:
[act] (1) Introduce the concept of 'sectioning root', of which we have four: <blockquote>, <td>, <datagrid>, <figure>; stop <blockquote> from being a sectioning element

Modified: index
===================================================================
--- index	2008-02-26 20:42:59 UTC (rev 1254)
+++ index	2008-02-27 00:24:14 UTC (rev 1255)
@@ -24,7 +24,7 @@
 
    <h1 id=html-5>HTML 5</h1>
 
-   <h2 class="no-num no-toc" id=working>Working Draft — 26 February
+   <h2 class="no-num no-toc" id=working>Working Draft — 27 February
     2008</h2>
 
    <p>You can take part in this work. <a
@@ -440,36 +440,33 @@
        <li><a href="#the-article"><span class=secno>3.8.4 </span>The
         <code>article</code> element</a>
 
-       <li><a href="#the-blockquote"><span class=secno>3.8.5 </span>The
-        <code>blockquote</code> element</a>
-
-       <li><a href="#the-aside"><span class=secno>3.8.6 </span>The
+       <li><a href="#the-aside"><span class=secno>3.8.5 </span>The
         <code>aside</code> element</a>
 
-       <li><a href="#the-h1"><span class=secno>3.8.7 </span>The
+       <li><a href="#the-h1"><span class=secno>3.8.6 </span>The
         <code>h1</code>, <code>h2</code>, <code>h3</code>, <code>h4</code>,
         <code>h5</code>, and <code>h6</code> elements</a>
 
-       <li><a href="#the-header"><span class=secno>3.8.8 </span>The
+       <li><a href="#the-header"><span class=secno>3.8.7 </span>The
         <code>header</code> element</a>
 
-       <li><a href="#the-footer"><span class=secno>3.8.9 </span>The
+       <li><a href="#the-footer"><span class=secno>3.8.8 </span>The
         <code>footer</code> element</a>
 
-       <li><a href="#the-address"><span class=secno>3.8.10 </span>The
+       <li><a href="#the-address"><span class=secno>3.8.9 </span>The
         <code>address</code> element</a>
 
-       <li><a href="#headings"><span class=secno>3.8.11 </span>Headings and
+       <li><a href="#headings"><span class=secno>3.8.10 </span>Headings and
         sections</a>
         <ul class=toc>
-         <li><a href="#outlines"><span class=secno>3.8.11.1. </span>Creating
+         <li><a href="#outlines"><span class=secno>3.8.10.1. </span>Creating
           an outline</a>
 
-         <li><a href="#associatedSection"><span class=secno>3.8.11.2.
+         <li><a href="#associatedSection"><span class=secno>3.8.10.2.
           </span>Determining which heading and section applies to a
           particular node</a>
 
-         <li><a href="#distinguishing"><span class=secno>3.8.11.3.
+         <li><a href="#distinguishing"><span class=secno>3.8.10.3.
           </span>Distinguishing site-wide headers from page headers</a>
         </ul>
       </ul>
@@ -487,6 +484,9 @@
 
        <li><a href="#the-dialog"><span class=secno>3.9.4 </span>The
         <code>dialog</code> element</a>
+
+       <li><a href="#the-blockquote"><span class=secno>3.9.5 </span>The
+        <code>blockquote</code> element</a>
       </ul>
 
      <li><a href="#preformatted"><span class=secno>3.10 </span>Preformatted
@@ -8409,74 +8409,7 @@
    href="#address">address</a></code> element) does not apply to nested
    <code><a href="#article">article</a></code> elements.
 
-  <h4 id=the-blockquote><span class=secno>3.8.5 </span>The <dfn
-   id=blockquote><code>blockquote</code></dfn> element</h4>
-
-  <dl class=element>
-   <dt>Categories
-
-   <dd><a href="#prose1">Prose content</a>.
-
-   <dd><a href="#sectioning0">Sectioning content</a>.
-
-   <dt>Contexts in which this element may be used:
-
-   <dd>Where <a href="#prose1">prose content</a> is expected.
-
-   <dt>Content model:
-
-   <dd><a href="#prose1">Prose content</a>.
-
-   <dt>Element-specific attributes:
-
-   <dd><code title=attr-blockquote-cite><a href="#cite">cite</a></code>
-
-   <dt>DOM interface:
-
-   <dd>
-    <pre
-     class=idl>interface <dfn id=htmlquoteelement>HTMLQuoteElement</dfn> : <a href="#htmlelement">HTMLElement</a> {
-           attribute DOMString <a href="#cite0" title=dom-quote-cite>cite</a>;
-};</pre>
-
-    <p class=note>The <code><a
-     href="#htmlquoteelement">HTMLQuoteElement</a></code> interface is also
-     used by the <code><a href="#q">q</a></code> element.</p>
-  </dl>
-
-  <p>The <code><a href="#blockquote">blockquote</a></code> element represents
-   a section that is quoted from another source.
-
-  <p>Content inside a <code><a href="#blockquote">blockquote</a></code> must
-   be quoted from another source, whose URI, if it has one, should be cited
-   in the <dfn id=cite title=attr-blockquote-cite><code>cite</code></dfn>
-   attribute.
-
-  <p>If the <code title=attr-blockquote-cite><a href="#cite">cite</a></code>
-   attribute is present, it must be a URI (or IRI). User agents should allow
-   users to follow such citation links.
-
-  <p>If a <code><a href="#blockquote">blockquote</a></code> element is <a
-   href="#preceded">preceded or followed</a> by a single <a
-   href="#paragraph">paragraph</a> that contains a single <code><a
-   href="#cite2">cite</a></code> element and that is itself not <a
-   href="#preceded">preceded or followed</a> by another <code><a
-   href="#blockquote">blockquote</a></code> element and does not itself have
-   a <code><a href="#q">q</a></code> element descendant, then, the title of
-   the work given by that <code><a href="#cite2">cite</a></code> element
-   gives the source of the quotation contained in the <code><a
-   href="#blockquote">blockquote</a></code> element.
-
-  <p>The <dfn id=cite0 title=dom-quote-cite><code>cite</code></dfn> DOM
-   attribute <code>reflects</code> the element's <code title="">cite</code>
-   content attribte.
-
-  <p class=note>The best way to represent a conversation is not with the
-   <code><a href="#cite2">cite</a></code> and <code><a
-   href="#blockquote">blockquote</a></code> elements, but with the <code><a
-   href="#dialog">dialog</a></code> element.
-
-  <h4 id=the-aside><span class=secno>3.8.6 </span>The <dfn
+  <h4 id=the-aside><span class=secno>3.8.5 </span>The <dfn
    id=aside><code>aside</code></dfn> element</h4>
 
   <dl class=element>
@@ -8547,7 +8480,7 @@
 ...</pre>
   </div>
 
-  <h4 id=the-h1><span class=secno>3.8.7 </span>The <dfn
+  <h4 id=the-h1><span class=secno>3.8.6 </span>The <dfn
    id=h1><code>h1</code></dfn>, <dfn id=h2><code>h2</code></dfn>, <dfn
    id=h3><code>h3</code></dfn>, <dfn id=h4><code>h4</code></dfn>, <dfn
    id=h5><code>h5</code></dfn>, and <dfn id=h6><code>h6</code></dfn> elements</h4>
@@ -8587,7 +8520,7 @@
    the highest rank, the <code><a href="#h6">h6</a></code> element has the
    lowest rank, and two elements with the same name have equal rank.
 
-  <h4 id=the-header><span class=secno>3.8.8 </span>The <dfn
+  <h4 id=the-header><span class=secno>3.8.7 </span>The <dfn
    id=header><code>header</code></dfn> element</h4>
 
   <dl class=element>
@@ -8680,7 +8613,7 @@
    href="#header">header</a></code> element is the same as for an <code><a
    href="#h1">h1</a></code> element (the highest rank).
 
-  <h4 id=the-footer><span class=secno>3.8.9 </span>The <dfn
+  <h4 id=the-footer><span class=secno>3.8.8 </span>The <dfn
    id=footer><code>footer</code></dfn> element</h4>
 
   <dl class=element>
@@ -8740,7 +8673,7 @@
 </body></pre>
   </div>
 
-  <h4 id=the-address><span class=secno>3.8.10 </span>The <dfn
+  <h4 id=the-address><span class=secno>3.8.9 </span>The <dfn
    id=address><code>address</code></dfn> element</h4>
 
   <dl class=element>
@@ -8824,7 +8757,7 @@
    element, does not apply to its ancestor elements, e.g. the page's <code><a
    href="#body0">body</a></code>.
 
-  <h4 id=headings><span class=secno>3.8.11 </span><dfn id=headings0>Headings
+  <h4 id=headings><span class=secno>3.8.10 </span><dfn id=headings0>Headings
    and sections</dfn></h4>
 
   <p>The <code><a href="#h1">h1</a></code>-<code><a href="#h6">h6</a></code>
@@ -8837,16 +8770,18 @@
    href="#rank">rank</a> start new (implied) sections, headers of lower <a
    href="#rank">rank</a> start subsections that are part of the previous one.
 
-  <p><a href="#sectioning0">Sectioning content</a> elements other than
-   <code><a href="#blockquote">blockquote</a></code> are always considered
-   subsections of their nearest ancestor element of <a
+  <p><a href="#sectioning0">Sectioning content</a> elements are always
+   considered subsections of their nearest ancestor element of <a
    href="#sectioning0">sectioning content</a>, regardless of what implied
-   sections other headings may have created. However, <code><a
-   href="#blockquote">blockquote</a></code> elements <em>are</em> associated
-   with implied sections. Effectively, <code><a
-   href="#blockquote">blockquote</a></code> elements act like sections on the
-   inside, and act opaquely on the outside.
+   sections other headings may have created.
 
+  <p>Certain elements are said to be <dfn id=sectioning1 title="sectioning
+   root">sectioning roots</dfn>, including <code><a
+   href="#blockquote">blockquote</a></code> and <code><a
+   href="#td">td</a></code> elements. These elements can have their own
+   outlines, but the sections and headers inside these elements do not
+   contribute to the outlines of their ancestors.
+
   <div class=example>
    <p>For the following fragment:</p>
 
@@ -8868,28 +8803,21 @@
 
    <ol>
     <li> Foo (heading of explicit <code><a href="#body0">body</a></code>
-     section)
+     section, containing the "Grunt" paragraph)
      <ol>
-      <li> Bar (heading starting implied section)
-       <ol>
-        <li> Bla (heading of explicit <code><a
-         href="#blockquote">blockquote</a></code> section)
-       </ol>
-       Baz (paragraph)
+      <li> Bar (heading starting implied section, containing a block quote
+       and the "Baz" paragraph)
 
       <li> Quux (heading starting implied section)
 
       <li> Thud (heading of explicit <code><a
        href="#section">section</a></code> section)
      </ol>
-     Grunt (paragraph)
    </ol>
 
-   <p>Notice how the <code><a href="#blockquote">blockquote</a></code> nests
-    inside an implicit section while the <code><a
-    href="#section">section</a></code> does not (and in fact, ends the
-    earlier implicit section so that a later paragraph is back at the top
-    level).</p>
+   <p>Notice how the <code><a href="#section">section</a></code> ends the
+    earlier implicit section so that a later paragraph ("Grunt") is back at
+    the top level.</p>
   </div>
 
   <p>Sections may contain headers of any <a href="#rank">rank</a>, but
@@ -8941,7 +8869,7 @@
     produce the same outline in compliant user agents.</p>
   </div>
 
-  <h5 id=outlines><span class=secno>3.8.11.1. </span>Creating an outline</h5>
+  <h5 id=outlines><span class=secno>3.8.10.1. </span>Creating an outline</h5>
 
   <p class=big-issue>This section will be rewritten at some point. The
    algorithm likely won't change, but its description will be dramatically
@@ -9077,7 +9005,7 @@
 }</pre>
   </div>
 
-  <h5 id=associatedSection><span class=secno>3.8.11.2. </span>Determining
+  <h5 id=associatedSection><span class=secno>3.8.10.2. </span>Determining
    which heading and section applies to a particular node</h5>
 
   <p class=big-issue>This section will be rewritten at some point. The
@@ -9305,7 +9233,7 @@
    </table>
   </div>
 
-  <h5 id=distinguishing><span class=secno>3.8.11.3. </span>Distinguishing
+  <h5 id=distinguishing><span class=secno>3.8.10.3. </span>Distinguishing
    site-wide headers from page headers</h5>
 
   <p>Given the <a href="#outlines">hypothetical section tree</a>, but
@@ -9606,6 +9534,73 @@
    and <code><a href="#blockquote">blockquote</a></code> elements for other
    ways to cite or quote.
 
+  <h4 id=the-blockquote><span class=secno>3.9.5 </span>The <dfn
+   id=blockquote><code>blockquote</code></dfn> element</h4>
+
+  <dl class=element>
+   <dt>Categories
+
+   <dd><a href="#prose1">Prose content</a>.
+
+   <dd><a href="#sectioning1">Sectioning root</a>.
+
+   <dt>Contexts in which this element may be used:
+
+   <dd>Where <a href="#prose1">prose content</a> is expected.
+
+   <dt>Content model:
+
+   <dd><a href="#prose1">Prose content</a>.
+
+   <dt>Element-specific attributes:
+
+   <dd><code title=attr-blockquote-cite><a href="#cite">cite</a></code>
+
+   <dt>DOM interface:
+
+   <dd>
+    <pre
+     class=idl>interface <dfn id=htmlquoteelement>HTMLQuoteElement</dfn> : <a href="#htmlelement">HTMLElement</a> {
+           attribute DOMString <a href="#cite0" title=dom-quote-cite>cite</a>;
+};</pre>
+
+    <p class=note>The <code><a
+     href="#htmlquoteelement">HTMLQuoteElement</a></code> interface is also
+     used by the <code><a href="#q">q</a></code> element.</p>
+  </dl>
+
+  <p>The <code><a href="#blockquote">blockquote</a></code> element represents
+   a section that is quoted from another source.
+
+  <p>Content inside a <code><a href="#blockquote">blockquote</a></code> must
+   be quoted from another source, whose URI, if it has one, should be cited
+   in the <dfn id=cite title=attr-blockquote-cite><code>cite</code></dfn>
+   attribute.
+
+  <p>If the <code title=attr-blockquote-cite><a href="#cite">cite</a></code>
+   attribute is present, it must be a URI (or IRI). User agents should allow
+   users to follow such citation links.
+
+  <p>If a <code><a href="#blockquote">blockquote</a></code> element is <a
+   href="#preceded">preceded or followed</a> by a single <a
+   href="#paragraph">paragraph</a> that contains a single <code><a
+   href="#cite2">cite</a></code> element and that is itself not <a
+   href="#preceded">preceded or followed</a> by another <code><a
+   href="#blockquote">blockquote</a></code> element and does not itself have
+   a <code><a href="#q">q</a></code> element descendant, then, the title of
+   the work given by that <code><a href="#cite2">cite</a></code> element
+   gives the source of the quotation contained in the <code><a
+   href="#blockquote">blockquote</a></code> element.
+
+  <p>The <dfn id=cite0 title=dom-quote-cite><code>cite</code></dfn> DOM
+   attribute <code>reflects</code> the element's <code title="">cite</code>
+   content attribte.
+
+  <p class=note>The best way to represent a conversation is not with the
+   <code><a href="#cite2">cite</a></code> and <code><a
+   href="#blockquote">blockquote</a></code> elements, but with the <code><a
+   href="#dialog">dialog</a></code> element.
+
   <h3 id=preformatted><span class=secno>3.10 </span>Preformatted text</h3>
 
   <h4 id=the-pre><span class=secno>3.10.1 </span>The <dfn
@@ -12644,6 +12639,8 @@
 
    <dd><a href="#prose1">Prose content</a>.
 
+   <dd><a href="#sectioning1">Sectioning root</a>.
+
    <dt>Contexts in which this element may be used:
 
    <dd>Where <a href="#prose1">prose content</a> is expected.
@@ -19919,7 +19916,7 @@
   <dl class=element>
    <dt>Categories
 
-   <dd>None.
+   <dd><a href="#sectioning1">Sectioning root</a>.
 
    <dt>Contexts in which this element may be used:
 
@@ -21617,6 +21614,8 @@
 
    <dd><span>Interactive element</span>.
 
+   <dd><a href="#sectioning1">Sectioning root</a>.
+
    <dt>Contexts in which this element may be used:
 
    <dd>Where <a href="#prose1">prose content</a> is expected.

Modified: source
===================================================================
--- source	2008-02-26 20:42:59 UTC (rev 1254)
+++ source	2008-02-27 00:24:14 UTC (rev 1255)
@@ -6787,58 +6787,7 @@
   nested <code>article</code> elements.</p>
 
 
-  <h4>The <dfn><code>blockquote</code></dfn> element</h4>
 
-  <dl class="element">
-   <dt>Categories</dt>
-   <dd><span>Prose content</span>.</dd>
-   <dd><span>Sectioning content</span>.</dd>
-   <dt>Contexts in which this element may be used:</dt>
-   <dd>Where <span>prose content</span> is expected.</dd>
-   <dt>Content model:</dt>
-   <dd><span>Prose content</span>.</dd>
-   <dt>Element-specific attributes:</dt>
-   <dd><code title="attr-blockquote-cite">cite</code></dd>
-   <dt>DOM interface:</dt>
-   <dd>
-<pre class="idl">interface <dfn>HTMLQuoteElement</dfn> : <span>HTMLElement</span> {
-           attribute DOMString <span title="dom-quote-cite">cite</span>;
-};</pre>
-    <p class="note">The <code>HTMLQuoteElement</code> interface is
-    also used by the <code>q</code> element.</p>
-   </dd>
-  </dl>
-
-  <p>The <code>blockquote</code> element represents a section that is
-  quoted from another source.</p>
-
-  <p>Content inside a <code>blockquote</code> must be quoted from
-  another source, whose URI, if it has one, should be cited in the
-  <dfn title="attr-blockquote-cite"><code>cite</code></dfn>
-  attribute.</p>
-
-  <p>If the <code title="attr-blockquote-cite">cite</code> attribute
-  is present, it must be a URI (or IRI). User agents should allow
-  users to follow such citation links.</p>
-
-  <p>If a <code>blockquote</code> element is <span>preceded or
-  followed</span> by a single <span>paragraph</span> that contains a
-  single <code>cite</code> element and that is itself not
-  <span>preceded or followed</span> by another <code>blockquote</code>
-  element and does not itself have a <code>q</code> element
-  descendant, then, the title of the work given by that
-  <code>cite</code> element gives the source of the quotation
-  contained in the <code>blockquote</code> element.</p>
-
-  <p>The <dfn title="dom-quote-cite"><code>cite</code></dfn> DOM
-  attribute <code>reflects</code> the element's <code
-  title="">cite</code> content attribte.
-
-  <p class="note">The best way to represent a conversation is not with
-  the <code>cite</code> and <code>blockquote</code> elements, but with
-  the <code>dialog</code> element.</p>
-
-
   <h4>The <dfn><code>aside</code></dfn> element</h4>
 
   <dl class="element">
@@ -7144,17 +7093,18 @@
   start new (implied) sections, headers of lower <span>rank</span>
   start subsections that are part of the previous one.</p>
 
-  <p><span>Sectioning content</span> elements other than
-  <code>blockquote</code> are always considered subsections of their
-  nearest ancestor element of <span>sectioning content</span>,
-  regardless of what implied sections other headings may have created.
-  However, <code>blockquote</code> elements <em>are</em> associated
-  with implied sections. Effectively, <code>blockquote</code> elements
-  act like sections on the inside, and act opaquely on the
-  outside.</p>
+  <p><span>Sectioning content</span> elements are always considered
+  subsections of their nearest ancestor element of <span>sectioning
+  content</span>, regardless of what implied sections other headings
+  may have created.</p>
 
-  <div class="example">
+  <p>Certain elements are said to be <dfn title="sectioning
+  root">sectioning roots</dfn>, including <code>blockquote</code> and
+  <code>td</code> elements. These elements can have their own
+  outlines, but the sections and headers inside these elements do not
+  contribute to the outlines of their ancestors.</p>
 
+  <div class="example">
    <p>For the following fragment:</p>
    <pre><body>
  <h1>Foo</h1>
@@ -7172,16 +7122,10 @@
    <p>...the structure would be:</p>
    <ol>
     <li>
-     Foo (heading of explicit <code>body</code> section)
+     Foo (heading of explicit <code>body</code> section, containing the "Grunt" paragraph)
      <ol>
       <li>
-       Bar (heading starting implied section)
-       <ol>
-        <li>
-         Bla (heading of explicit <code>blockquote</code> section)
-        </li>
-       </ol>
-       Baz (paragraph)
+       Bar (heading starting implied section, containing a block quote and the "Baz" paragraph)
       </li>
       <li>
        Quux (heading starting implied section)
@@ -7190,13 +7134,11 @@
        Thud (heading of explicit <code>section</code> section)
       </li>
      </ol>
-     Grunt (paragraph)
     </li>
    </ol>
-   <p>Notice how the <code>blockquote</code> nests inside an implicit
-   section while the <code>section</code> does not (and in fact, ends
-   the earlier implicit section so that a later paragraph is back at
-   the top level).</p>
+   <p>Notice how the <code>section</code> ends the earlier implicit
+   section so that a later paragraph ("Grunt") is back at the top
+   level.</p>
   </div>
 
   <p>Sections may contain headers of any <span>rank</span>, but
@@ -7829,6 +7771,59 @@
   to cite or quote.</p>
 
 
+  <h4>The <dfn><code>blockquote</code></dfn> element</h4>
+
+  <dl class="element">
+   <dt>Categories</dt>
+   <dd><span>Prose content</span>.</dd>
+   <dd><span>Sectioning root</span>.</dd>
+   <dt>Contexts in which this element may be used:</dt>
+   <dd>Where <span>prose content</span> is expected.</dd>
+   <dt>Content model:</dt>
+   <dd><span>Prose content</span>.</dd>
+   <dt>Element-specific attributes:</dt>
+   <dd><code title="attr-blockquote-cite">cite</code></dd>
+   <dt>DOM interface:</dt>
+   <dd>
+<pre class="idl">interface <dfn>HTMLQuoteElement</dfn> : <span>HTMLElement</span> {
+           attribute DOMString <span title="dom-quote-cite">cite</span>;
+};</pre>
+    <p class="note">The <code>HTMLQuoteElement</code> interface is
+    also used by the <code>q</code> element.</p>
+   </dd>
+  </dl>
+
+  <p>The <code>blockquote</code> element represents a section that is
+  quoted from another source.</p>
+
+  <p>Content inside a <code>blockquote</code> must be quoted from
+  another source, whose URI, if it has one, should be cited in the
+  <dfn title="attr-blockquote-cite"><code>cite</code></dfn>
+  attribute.</p>
+
+  <p>If the <code title="attr-blockquote-cite">cite</code> attribute
+  is present, it must be a URI (or IRI). User agents should allow
+  users to follow such citation links.</p>
+
+  <p>If a <code>blockquote</code> element is <span>preceded or
+  followed</span> by a single <span>paragraph</span> that contains a
+  single <code>cite</code> element and that is itself not
+  <span>preceded or followed</span> by another <code>blockquote</code>
+  element and does not itself have a <code>q</code> element
+  descendant, then, the title of the work given by that
+  <code>cite</code> element gives the source of the quotation
+  contained in the <code>blockquote</code> element.</p>
+
+  <p>The <dfn title="dom-quote-cite"><code>cite</code></dfn> DOM
+  attribute <code>reflects</code> the element's <code
+  title="">cite</code> content attribte.
+
+  <p class="note">The best way to represent a conversation is not with
+  the <code>cite</code> and <code>blockquote</code> elements, but with
+  the <code>dialog</code> element.</p>
+
+
+
   <h3>Preformatted text</h3>
 
   <h4>The <dfn><code>pre</code></dfn> element</h4>
@@ -10566,6 +10561,7 @@
   <dl class="element">
    <dt>Categories</dt>
    <dd><span>Prose content</span>.</dd>
+   <dd><span>Sectioning root</span>.</dd>
    <dt>Contexts in which this element may be used:</dt>
    <dd>Where <span>prose content</span> is expected.</dd>
    <dt>Content model:</dt>
@@ -17401,7 +17397,7 @@
 
   <dl class="element">
    <dt>Categories</dt>
-   <dd>None.</dd>
+   <dd><span>Sectioning root</span>.</dd>
    <dt>Contexts in which this element may be used:</dt>
    <dd>As a child of a <code>tr</code> element.</dd>
    <dt>Content model:</dt>
@@ -19301,6 +19297,7 @@
    <dt>Categories</dt>
    <dd><span>Prose element</span>.</dd>
    <dd><span>Interactive element</span>.</dd>
+   <dd><span>Sectioning root</span>.</dd>
    <dt>Contexts in which this element may be used:</dt>
    <dd>Where <span>prose content</span> is expected.</dd>
    <dt>Content model:</dt>




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