update on a fragment, which would raise an error if applied on a database node.
;Example 1Target is a DOM node: : Query: <pre>insert node attribute id{'1'} into <<a id='0'/></pre>: Result:<pre/>
;Example 2Target is a database node: : QueryFile 'doc.xml': <pre><n id='1'/></pre>: <pre>insert node attribute id{'0'} into doc('doc.xml')//n</pre>: File 'doc.xml': <code><n id='1'/></code> : Result: <code>[XUDY0021] Duplicate attribute "id".</code>
===Fragments & fn:put()===