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((notability|date=September 2011))

'''XQuery Update Facility''' is an extension to the XML Query language, [[XQuery]].  It provides expressions that can be used to make changes to instances of the XQuery 1.0 and [[XPath]] 2.0 Data Model.

It became a W3C Candidate Recommendation on 31 July 2009 and was finalised as Recommendation on 17 March 2011.<ref name="timelinehistory">((cite web|url=http://www.dblab.ntua.gr/~bikakis/XML%20and%20Semantic%20Web%20W3C%20Standards%20Timeline-History.pdf |title=XML and Semantic Web W3C Standards Timeline
))</ref>

A version to work with XQuery 3.0 was drafted,<ref>[https://www.w3.org/TR/2017/NOTE-xquery-update-30-20170124/ XQuery Update Facility 3.0]</ref> but was never completed, and is archived as a W3C Working Group Note.

==Implementations==
((more citations needed section|date=May 2020))
*  [[BaseX (database)|BaseX]] - An open source XML Database and XQuery Processor; supported since Version 6.0
* DataDirect XQuery - a java-based commercial XQuery processor. Supported since Version 4.0
* EMC Documentum xDB - Native XML Database.  XQuery Update Facility supported since Version 9.0
* [[eXist]] - The open source XML Database provide an extension to XQuery, which maps each of the XUpdate instructions to a corresponding XQuery expression
* MonetDB/XQuery - An open source XQuery processor on top of the  MonetDB relational database system (declared obsolete since 2011<ref>[https://www.monetdb.org/XQuery MonetDB/XQuery page]</ref>).
* [[PureXML]] - IBM DB2 offers XQuery Update Facility since Version 9.5.
* [[Oracle Database|Oracle]] XMLDB - Oracle database offers XQuery Update Facility since version 12.1.0.2 <ref>[https://docs.oracle.com/database/121/ADXDB/changes.htm#GUID-B2437062-2852-4B8C-A419-48FF8D9028F8 XQuery Update Facility in Oracle 12.1.0.2]</ref>).
* qizxopen  XQuery engine.
* SaxonSA XSLT and XQuery Processor - by [[Michael Howard Kay|Michael Kay]]; Supported since Version 9.1, but only in the commercial version.
* XQilla - An open source (ASL2.0) XQuery processing library with support for the latest XQuery Update features.  XQilla is written in C++ and includes a command line executable shell to execute queries against XML content stored on a local filesystem.  This library is actively developed and part of a supported Oracle product,  Berkeley DB XML.

==References==
((Reflist))

==External links==
* ((Wikibooks-inline|XQuery#XQuery_Updates|XQuery Updates))
* [http://www.w3.org/TR/xquery-update-10/ XQuery Update Facility] on [[World Wide Web Consortium|W3]]
* [http://www.xmlmind.com/tutorials.html XQuery Update for the impatient], a tutorial on XQuery Update and its quirks.
* [https://docs.oracle.com/database/121/ADXDB/changes.htm#GUID-B2437062-2852-4B8C-A419-48FF8D9028F8 XQuery Update Facility] - Changes in Oracle Database 12c Release 1 (12.1.0.1) for Oracle XML DB.

((W3C standards))

((DEFAULTSORT:Xquery Update Facility))
[[Category:World Wide Web Consortium standards]]


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