| The name of a processing instruction is invalid.
|<code>processing-instruction { "1" } { "" }</code>
|- valign="top" scope="row"
|<code>XQDY0043</code>
| The node name of an attribute uses reserved prefixes or namespaces.
|<code>attribute xmlns { "etc" }</code>
|- valign="top" scope="row"
|<code>XQDY0064</code>