QT4 CG Meeting 160 Agenda 2026-04-14

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Agenda

This meeting will be hosted on Zoom at 16:00BST (15:00GMT, 17:00CEST, 11:00EDT).

See the meeting logistics page for more details.

1. Administrivia

1.1. Roll call

1.2. Approve the agenda

1.3. Approve minutes of previous meeting

Minutes of the previous meeting.

1.4. Next meeting

This meeting is planned for 14 April 2026.

The next meeting is planned for 21 April 2026.

1.5. Review of open action items [1/10]

  • [ ] QT4CG-143-02: MK to try to recover the ability to extract formal equivalences into tests
  • [ ] QT4CG-144-01: MK to consider if any now lost value comparisons should be added as examples.
  • [ ] QT4CG-150-04: NW to see about a status update on PR #2345; possibly schedule discussion
  • [ ] QT4CG-156-01: MK: add reference to data model in F&O 9.2
  • [ ] QT4CG-156-03: MK to revise PR #2516 in light of the comments.
  • [ ] QT4CG-158-01: MK to revisit the Conformance section to revise in light of #2556 error changes
  • [ ] QT4CG-158-02: MK to add system-properties() keys for file and binary support

1.6. Review of open pull requests and issues

This section summarizes all of the issues and pull requests that need to be resolved before we can finish. See Technical Agenda below for the focus of this meeting.

1.6.1. Blocked

The following PRs are open but have merge conflicts or comments which suggest they aren’t ready for action.

  • PR #2470: 1310 Functions fn:regex and ?matching-substrings
  • PR #2350: 708 An alternative proposal for generators
  • PR #2345: 2299 Expand pipeline to allow arrow expression in path expression
  • PR #2247: 716 Deferred Evaluation in XPath - the f:generator record
  • PR #2160: 2073 data model changes for JNodes and Sequences
  • PR #2071: 77c deep update
  • PR #2019: 1776: XSLT template rules for maps and array

1.6.2. Close without action

It has been proposed that the following issues be closed without action. If you think discussion is necessary, please say so.

  • Issue #1584: Review the XML Schema and RELAX NG schemas for XSLT 4.0 for compatibility

1.6.3. Substantive PRs

The following substantive PRs were open when this agenda was prepared.

  • PR #2578: 2561 Explain and define methods and method calls
  • PR #2577: 2575 Make xs:error available unconditionally
  • PR #2574: 2550 Shadow attributes in RELAX NG grammar (alt)
  • PR #2566: 1979 Records with type annotations

1.6.4. Required for V4.0

The following issues are labeled “required for V4.0”.

  • Issue #1777: Shallow copy in XSLT with maps and arrays
  • Issue #675: XSLT streaming rules for new constructs

2. Technical agenda

2.1. PR #2578: 2561 Explain and define methods and method calls

See PR #2578.

2.2. PR #2577: 2575 Make xs:error available unconditionally

See PR #2577.

2.3. PR #2574: 2550 Shadow attributes in RELAX NG grammar (alt)

See PR #2574.

2.4. PR #2566: 1979 Records with type annotations

See PR #2566.

Are we ready for more discussion?

2.5. Triage and issue review

It seems unlikely that the reviewing PRs will take the full hour. Let’s plan to consider other triage activities.

3. Any other business