Implement W3C XQuery Update Facility 3.0#6214

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joewiz wants to merge 8 commits intoeXist-db:developfrom

joewiz:v2/w3c-xquery-update-3.0

Commits on Apr 13, 2026

[feature] Implement W3C XQUF 3.0 expression classes and Pending Update List

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[feature] Add XQUF static type checking and isVacuous() detection

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[feature] Add in-memory DOM mutation methods for XQUF operations

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[feature] Add XQUF 3.0 grammar rules to XQuery.g and XQueryTree.g

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[feature] Implement fn:put and XQUF integration infrastructure

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[test] Add XQUF JUnit tests and performance benchmarks

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Commits on Apr 25, 2026

[feature] Add declare revalidation parser support for XQUF 3.0

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Commits on Apr 26, 2026

[refactor] Annotate intentional identity comparison in PendingUpdateList

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