. no namespace or
 attribute-qualifier) is not a legal <code>XmlElemRef</code> expression,
 since it's already used for standard JavaScript <A HREF="../../../../org/mozilla/javascript/ast/ElementGet.html" title="class in org.mozilla.javascript.ast"><CODE>ElementGet</CODE></A>
 array-indexing.  Hence, an <code>XmlElemRef</code> node always has
 either the attribute-qualifier, a non-<code>null</code> namespace node,
 or both.<p>

 The node starts at the <code>@</code> token, if present.  Otherwise it starts
 