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This document is governed by the 1 March 2017 W3C Process Document. This document was published by the W3C XML Query Working Group and the W3C XSLT Working Group, each of which is part of the XML Activity.
This Recommendation specifies XSLT and XQuery Functions and Operators (F&O) version 3.1, a fully compatible extension of F&O version 3.0.
It also replicates some of the functions defined herein, notably those concerned with processing of maps, so that these functions are available in XSLT 3.0 whether or not the processor supports XPath 3.1.
This is the fourth version of the specification of this function library.
This document defines three classes of functions: [XML Schema Part 2: Datatypes Second Edition] defines a number of primitive and derived datatypes, collectively known as built-in datatypes.
This document defines functions and operations on these datatypes as well as the other types (for example, nodes and sequences of nodes) defined in Section 2.7 Schema Information of the [XQuery and XPath Data Model (XDM) 3.1].
It also defines functions and operators on nodes and node sequences as defined in the [XQuery and XPath Data Model (XDM) 3.1].
These functions and operators are defined for use in [XML Path Language (XPath) 3.1] and [XQuery 3.1: An XML Query Language] and [XSL Transformations (XSLT) Version 3.0] and other related XML standards.
The second version was published under the title on 23 January 2007, subsequently revised in a second edition published on 14 December 2010.
Please report errors in this document using W3C's public Bugzilla system (instructions can be found at https://
If access to that system is not feasible, you may send your comments to the W3C XSLT/XPath/XQuery public comments mailing list, [email protected]
This document incorporates minor changes made against the Proposed Recommendation of 17 January 2017.
Changes to this document since the Proposed Recommendation are detailed in F.5 Changes since the Proposed Recommendation of 17 January 2017.
Archives of the comments and responses are available at https://lists.w3.org/Archives/Public/public-qt-comments/.