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* In XQuery, local options can be set via option declarations and [[XQuery Extensions#Pragmas|pragmas]].
If options are changed by operations in the [[GUI]], the underlying commands will be listed in the [[GUI#Visualizations|Info View]].<br/><br/>
=Global Options=
|- valign="top"
| '''Summary'''
|Specifies the default authentication method, which will be used by the [[Web Application|HTTP server]] for negotiating credentials. Allowed values are {{Code|Basic}}, {{Code|Digest}}, and {{Code|Custom}}:<br/>
* If basic access is chosen, the client can still request digest authentication.
* This is different for digest access, which cannot be overwritten.
|- valign="top"
| '''Summary'''
|By default, if BaseX is run as [[Web Application]], the database server instance will be started in addition, which can then be addressed by [[Clients]] via the database port (see {{Option|PORT}}).<br/>If the option is set to {{Code|true}}, no database server will be launched.
|}
|- valign="top"
| '''Summary'''
|Defines name patterns for the parent elements of texts that are indexed. By default, all text nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.
|}
|- valign="top"
| '''Summary'''
|Defines name patterns for the attributes to be indexed. By default, all attribute nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.
|}
|- valign="top"
| '''Summary'''
|Defines name patterns for the attributes to be indexed. By default, tokens in all attribute nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.
|}
|- valign="top"
| '''Summary'''
|Defines name patterns for the parent elements of texts that are indexed. By default, all text nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.
|}
return $b/a is $a
</syntaxhighlight>
This step can be very expensive and memory consuming. If the option is disabled, child nodes will only be linked to the new parent nodes, and the upper query returns <code>true</code>.<br>The option should be used carefully as it changes the semantics of XQuery. It should preferably be used in [[XQuery Extensions#Database Pragmas|Pragmas]].
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