XPath 4.0, XQuery 4.0, XSLT 4.0: Standards Progress

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" summary

A W3C Community Group plans to release XPath 4.0, XSLT 4.0 and XQuery 4.0 around 2025 with multiple implementors (Saxonica, BaseX, Christian Grün, and a new processor by Mukul Gandhi). XPath 4.0 introduces records, enums, optional parameters, string value templates and a large function catalog (71 new functions) for sequences, maps and arrays. XSLT 4.0 adds switch, typed modes, inline type definitions, optional function parameters and improved namespace handling; XQuery 4.0 extends FLOWR to arrays and maps, adds FLOWR WHILE, and updates XDM with bug fixes and XML Schema 1.1 support.

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" chapters (9)

1. 0:00Introduction
2. 1:23XPath 4.0 new features
3. 3:26Useful XPath functions
4. 5:51XSLT 4.0 major changes
5. 7:15Optional functions and parameters
6. 8:42XSLT mode improvements
7. 10:03XQuery and XDM updates
8. 11:49XML standards future
9. 13:17Q&A

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