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With {{Version|8.5}}, the update expression was extended: * More than one node can now be specified as source:
Please note that the curly braces are mandatory here. Otherwise, the second {{Code|update}} keyword would be associated with the context item expression {{Code|.}}.
{{Mark|Introduced with Version 8.5}}: 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 availablein BaseX:
Additional With {{Version|9.0}}, serialization parameters can be specified as third argument (more details are found in the [https://www.w3.org/TR/xquery-update-30/#id-func-put XQUF 3.0 Specification]). Numerous additional [[Database Module#Updates|database functions]] exist for performing updates on document and database level.
no edit summary
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 should now be If wrapped with curly braces. * Update , update expressions can now be chained:
<pre class="brush:xquery">
}
</pre>
===transform with===
<pre class="brush:xquery">
===Built-in Functions===
{{Code|fn:put()}} is can be used to serialize XDM instances to secondary storage. It is executed at the end of a snapshot. Serialized documents therefore reflect all changes made effective during a query. No files will be created if the addressed nodes have been deleted.
===User-Defined Functions===
=Changelog=
;Version 9.0
* Updated: [[#Built-in Functions|Built-in Functions]]: serialization parameters
;Version 8.5
