Changes

* The module will be available if the {{Code|basex-api}} package must be included library is found in the classpath. This is always 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><nowiki>http://basex.org/modules/session</nowiki></code> namespace, which is statically bound to the {{Code|session}} prefix. The Prior to {{Version|9.2}}, the module must needed to be imported in the query prolog:

* In this documentation, the namespace is bound to the {{Code|session}} prefix.* Errors are assigned to the <code><nowiki>http://basex.org/errors</nowiki></code> namespace, which is statically bound to the {{Code|bxerr}} prefix.* If any of the functions is called outside the servlet context, the error {{Error|BXSE0003|<code>[[XQuery Errors#BaseX Errors}} |basex: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.

|Returns the names of all variables attributes bound to the current session.

|Returns the value of a session attribute with the specified <code>$name</code> bound to the current session. If the specified variable attribute is unknown, an empty sequence or the optionally specified default value is returned instead.|-| '''Errors'''|{{ErrorCode|BXSE0002|#Errors$default}} the value of a session variable could not will be retrievedreturned instead.

|{{Func|session:set|$key name as xs:string, $value as item()*|empty-sequence()}}

|Binds the specified key/{{Code|$value pair }} to a the sessionattribute with the specified {{Code|$name}}.

|{{Error|BXSE0001set|#Errors}} a function item was specified as The supplied value of a session variablecannot be materialized.

|{{Func|session:delete|$key name as xs:string|empty-sequence()}}

|Deletes a session variableattribute with the specified <code>$name</code>.

|{{Code|BXSE0001set}}|A function item was specified as The supplied value of a session attribute.|-|{{Code|BXSE0002}}|An error occurred while retrieving the value of a session attribute.|-|{{Code|BXSE0003}}|A function was called outside the servlet contextcannot be materialized.