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===XQUERY3===
{| width='100%'
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| width='120' | '''Signature'''
|{{Code|XQUERY3}}
|-
| '''Default'''
|{{Code|true}}
|-
| '''Summary'''
|Enables all [[XQuery 3.0]] features supported by BaseX. If this option is set to {{Code|false}}, the XQuery parser will only accept expressions of the XQuery 1.0 specification.
→MIXUPDATES
| '''Summary'''
|Prints more information on internal query rewritings, optimizations, and performance. By default, this info is shown in the [[GUI#Visualizations|Info View]] in the GUI. It can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-V</code>.
|}
|-
| '''Summary'''
|Allows queries to both contain updating and non-updating expressions. All updating constraints will be turned off, and nodes to be returned will be copied before they are modified by an updating expression. – By default, in compliance with the XQuery Update Facility, this option is set to {{Code|false}}, because the XQuery Update Facility does not allow an updating query to . See [[XQuery Update#Returning Results|return resultsReturning Results]]for more details.
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===WITHDB===
{{Mark|Introduced with Version 9.3.}}
{| width='100%'
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| '''Summary'''
|By default, paths URIs specified in the [[Databases#XML Documents|fn:doc]] and [[Databases#XML Documents|fn:collection]] functions will also be resolved against existing databases. If {{Function|Database|db:open}} is consistently used to access database documents, it is recommendable to disable this option:* Access to local and external resources will be faster, as the database lookup is will be skipped.
* No locks will be created by the two functions (see [[Transaction Management#Limitations|limitations of database locking]] for more details).
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