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* If any of the functions is called outside the servlet context, <code>[[XQuery Errors#BaseX Errors|basex:http]]</code> is raised.
* If a specified session id is not found, <code>[[#Errors|not-found]]</code> is raised.
* As sessions are side-effecting operations, all functions are flagged as ''non-deterministicnondeterministic''. As a result, some query optimizations will be suppressed.
=Functions=
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|<pre>sessions:ids||() as xs:string*}}</pre>
|- valign="top"
| '''Summary'''
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|<pre>sessions:created|( $id as xs:string|) as xs:dateTime}}</pre>
|- valign="top"
| '''Summary'''
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|<pre>sessions:accessed|( $id as xs:string|) as xs:dateTime}}</pre>
|- valign="top"
| '''Summary'''
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|<pre>sessions:names|( $id as xs:string|) as xs:string*}}</pre>
|- valign="top"
| '''Summary'''
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|sessions:get|$id as xs:string, $name as xs:string|item()*}}<br/pre>{{Func|sessions:get|( $id as xs:string, $name as xs:string, $default as item()*| := ()) as item()*}}</pre>
|- valign="top"
| '''Summary'''
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|<pre>sessions:set|( $id as xs:string, $name as xs:string, $value as item()*|) as empty-sequence()}}</pre>
|- valign="top"
| '''Summary'''
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|<pre>sessions:delete|( $id as xs:string, $name as xs:string|) as empty-sequence()}}</pre>
|- valign="top"
| '''Summary'''
{| width='100%'
|- valign="top"
| width='120' | '''SignaturesSignature'''|{{Func|<pre>sessions:close|( $id as xs:string|) as empty-sequence()}}</pre>
|- valign="top"
| '''Summary'''
