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[[Category:XQuery]]
→Conventions
=Conventions=
* This The module will be available if the {{Code|basex-api}} library is included found in the classpath. This is the case if you use one of the complete distributions of BaseX (zip, exe, war) of BaseX.* All functions and errors are assigned to the {{Code|http://basex.org/modules/session}} namespace, which must be dynamically imported.<pre class="brush:xquery"code><nowiki>import module namespace session = "http://basex.org/modules/session";...</prenowiki>* In this documentation, the namespace is bound to the {{Code|session}} prefix.* Errors are assigned to the {{Code|http:<//basex.org/errors}} code> namespace, which is statically bound to the {{Code|bxerrsession}} prefix.* If any of the functions is called outside the servlet context, the error <code>[[XQuery Errors#BXSE0003BaseX Errors|BXSE0003basex:http]] </code> is raised.* As sessions are side-effecting operations, all functions are flagged as ''non-deterministic''. This means that the functions As a result, some query optimizations will not be reordered by the compilersuppressed.
=Functions=
==session:id==
{| width='100%'
|-
| width='90120' | '''Signatures'''
|{{Func|session:id||xs:string}}
|-
==session:created==
{| width='100%'
|-
| width='90120' | '''Signatures'''
|{{Func|session:created||xs:dateTime}}
|-
==session:accessed==
{| width='100%'
|-
| width='90120' | '''Signatures'''
|{{Func|session:accessed||xs:dateTime}}
|-
==session:names==
{| width='100%'
|-
| width='90120' | '''Signatures'''
|{{Func|session:names||xs:string*}}
|-
| '''Summary'''
|Returns the names of all variables attributes bound to the current session.
|-
| '''Examples'''
==session:get==
{{Mark|Updated with Version 9.3:}} Values that have no XQuery type will be returned as strings.
{| width='100%'
|-
| width='90120' | '''Signatures'''|{{Func|session:get|$key name as xs:string|xs:string?item()*}}<br/>{{Func|session:get|$key name as xs:string, $default as xs:stringitem()*|xs:stringitem()*}}
|-
| '''Summary'''
|Returns the value of a variable bound to session attribute with the current sessionspecified <code>$name</code>. If the variable does not existattribute is unknown, an empty sequence or the optionally specified default value is returned instead.|-| '''Errors'''|{{ErrorCode|BXSE0002|#Errors$default}} the value of a session variable could not will be retrievedreturned instead.
|-
| '''Examples'''
==session:set==
{| width='100%'
|-
| width='90120' | '''Signatures'''|{{Func|session:set|$key name as xs:string, $value as xs:stringitem()*|empty-sequence()}}
|-
| '''Summary'''
|Assigns a Binds the specified {{Code|$value }} to a the session variableattribute with the specified {{Code|$name}}.
|-
| '''Errors'''
|{{Error|BXSE0001set|#Errors}} a function item was specified as The supplied value of a session variablecannot be materialized.
|-
| '''Examples'''
==session:delete==
{| width='100%'
|-
| width='90120' | '''Signatures'''|{{Func|session:delete|$key name as xs:string|empty-sequence()}}
|-
| '''Summary'''
|Deletes a session variableattribute with the specified <code>$name</code>.
|-
| '''Examples'''
==session:close==
{| width='100%'
|-
| width='90120' | '''Signatures'''
|{{Func|session:close||empty-sequence()}}
|-
=Errors=
{| width='100%' class="wikitable" width="100%"! width="5%110"|Code! width="95%"|Description|-|{{Code|BXSE0001}}|A function item was specified as value of a session attribute.|-|{{Code|BXSE0002}}|An error occurred while retrieving the value of a session attribute.
|-
|{{Code|BXSE0003set}}|A function was called outside the servlet contextThe supplied value cannot be materialized.
|}
=Changelog=
;Version 9.3
* Updated: [[#session:get|session:get]]: Values that have no XQuery type will be returned as strings.
;Version 9.0
* Updated: error codes updated; errors now use the module namespace
;Version 8.0
* Updated: Allow sequences as session values.
This module was introduced with Version 7.5.
