#: Query: <pre>insert nodes <a/> into root(), delete nodes //a</pre>
#: Result: Node <a/> is still in the database, because the delete function didn't find the nodes inserted by the insert function.
==XQUF Concepts==
<p>The most important thing to keep in mind when using XQuery Update is the pending update list. In contrast to other programming languages, XQUF statements are not executed immediately, but are first collected in a list-like structure, the pending update list (PUL).
==New Expressions==