[e] (0) Add a note about how namespaces aren't supported.

Fixing http://www.w3.org/Bugs/Public/show_bug.cgi?id=7510 git-svn-id: http://svn.whatwg.org/webapps@3956 340c8d12-0b0e-0410-8428-c7bf67bfef74
whatwg · Sep 22, 2009 · ecfb9af · ecfb9af
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diff --git a/index b/index
@@ -61296,6 +61296,30 @@ interface <dfn id=messageport>MessagePort</dfn> {
   an <a href=#syntax-ambiguous-ampersand title=syntax-ambiguous-ampersand>ambiguous
   ampersand</a>.</p>
 
+  <div class=note>
+
+   <p>The HTML syntax does not support namespace
+   declarations, even in <a href=#foreign-elements>foreign elements</a>.</p>
+
+   <p>For instance, consider the following HTML fragment:</p>
+
+   <pre>&lt;p&gt;
+ &lt;svg&gt;
+  &lt;metadata&gt;
+   &lt;!-- this is invalid --&gt;
+   &lt;cdr:license xmlns:cdr="http://www.example.com/cdr/metadata" name="MIT"/&gt;
+  &lt;/metadata&gt;
+ &lt;/svg&gt;
+&lt;/p&gt;</pre>
+
+   <p>The innermost element, <code title="">cdr:license</code>, is
+   actually in the SVG namespace, as the "<code title="">xmlns:cdr</code>" attribute has no effect (unlike in
+   XML). In fact, as the comment in the fragment above says, the
+   fragment is actually non-conforming. This is because the SVG
+   specification does not define any elements called "<code title="">cdr:license</code>" in the SVG namespace.</p>
+
+  </div>
+
   <p><a href=#normal-elements>Normal elements</a> can have <a href=#syntax-text title=syntax-text>text</a>, <a href=#syntax-charref title=syntax-charref>character references</a>, other <a href=#syntax-elements title=syntax-elements>elements</a>, and <a href=#syntax-comments title=syntax-comments>comments</a>, but the text must not
   contain the character U+003C LESS-THAN SIGN (<code>&lt;</code>) or
   an <a href=#syntax-ambiguous-ampersand title=syntax-ambiguous-ampersand>ambiguous

diff --git a/source b/source
@@ -75829,6 +75829,32 @@ interface <dfn>MessagePort</dfn> {
   an <span title="syntax-ambiguous-ampersand">ambiguous
   ampersand</span>.</p>
 
+  <div class="note">
+
+   <p>The HTML syntax does not support namespace
+   declarations, even in <span>foreign elements</span>.</p>
+
+   <p>For instance, consider the following HTML fragment:</p>
+
+   <pre>&lt;p>
+ &lt;svg>
+  &lt;metadata>
+   &lt;!-- this is invalid -->
+   &lt;cdr:license xmlns:cdr="http://www.example.com/cdr/metadata" name="MIT"/>
+  &lt;/metadata>
+ &lt;/svg>
+&lt;/p></pre>
+
+   <p>The innermost element, <code title="">cdr:license</code>, is
+   actually in the SVG namespace, as the "<code
+   title="">xmlns:cdr</code>" attribute has no effect (unlike in
+   XML). In fact, as the comment in the fragment above says, the
+   fragment is actually non-conforming. This is because the SVG
+   specification does not define any elements called "<code
+   title="">cdr:license</code>" in the SVG namespace.</p>
+
+  </div>
+
   <p><span>Normal elements</span> can have <span
   title="syntax-text">text</span>, <span
   title="syntax-charref">character references</span>, other <span