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With {{Version|8.5}}, the update expression was extended: * More than one node can now be specified as source:
This usually works best with curly braces. If the braces were omitted, the second {{Code|update}} keyword would be associated with the context item expression {{Code|.}}.
{{Mark|Introduced with Version 8.5}}:
→transform with
The {{Code|update}} expression is a BaseX-specific convenience operator for the {{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. An example:
<pre class="brush:xquery">
</pre>
<pre class="brush:xquery">
</pre>
* In analogy with [[#transform with|transform with]], the updating expressions can now be If wrapped with curly braces. * Update , update expressions can now be chained:
<pre class="brush:xquery">
}
</pre>
===transform with===
The {{Code|transform with}} expression was added to the current [https://www.w3.org/TR/xquery-update-30/#id-transform-with XQuery Update 3.0] working draft. It is a simple version of the [[#update|update]] expression and also available in BaseX:
to the specification and BaseX. All errors are listed in the
[[XQuery Errors#Update Errors|XQuery Errors]] overview.
Please remember that the collected updates will be executed after the query evaluation.
If errors occur at this final stage, they cannot be caught via try/catch.
=Changelog=
