Index: source
===================================================================
--- source	(revision 1414)
+++ source	(revision 1415)
@@ -42173,6 +42173,11 @@
     <p><span>Insert a foreign element</span> for the token, in the
     same namespace as the <span>current node</span>.</p>
 
+    <p>If the element has an <code title="">xmlns</code> attribute in
+    the <span>XMLNS namespace</span> whose value is not exactly the
+    same as the element's namespace, that is a <span>parse
+    error</span>.</p>
+
     <p>If the token has its <i>self-closing flag</i> set, pop the
     <span>current node</span> off the <span>stack of open
     elements</span> and <span title="acknowledge self-closing