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Please note that With {{Version 8.5}}, the update expression was extended: * More than one node can be specified as source: <pre class="brush:xquery">db:open('data')//item update delete node text()</pre> * In analogy with [[#transform with|transform with]], the updating expressions can – and should – be wrapped with curly braces. * The update expression can now be chained: <pre class="brush:xquery">(<root1/>, <root2/>) update { insert node <child/> into .} update { insert node "text" into child}</pre> ===transform with=== {{Mark|Introduced with Version 8.5}}: The {{Code|updatetransform with}} expression is not part of the official XQuery Update Facility yet.It is currently being discussed in the [https://www.w3.org/BugsTR/Publicxquery-update-30/show_bug#id-transform-with XQuery Update 3.cgi?id=23643 W3 Bug Tracker0]];your feedback working draft. It is welcomealso available in BaseX.
→Non-Updating Expressions
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The {{Code|update}} expression is a convenience operator for writing simple transform expressionsthe {{Code|copy/modify/return}} construct.
Similar to the [[XQuery 3.0#Simple Map Operator|XQuery 3.0 map operator]], the value of the first
expression is bound as context item, and the second expression performs updates on this item.
The updated item is returned as result.
==Functions==
