This site is used to publish specifications, meeting logistics, and other information about the QT4† CG (AKA the “XQuery and XSLT Extensions Community Group”).
The CG has weekly teleconferences on Tuesdays.
- The meeting logistics page provides additional details about meetings.
- The agendas and minutes are posted.
- You’ll find discussion
- in the mailing list archives
- and in the issues and pull requests on GitHub.
- (The issues for the 3.0/3.1 specifications are available separately.)
- The specifications are on GitHub.
- The dashboard shows the current state of development
with published versions of open pull requests.
- Pull requests are formatted automatically by GitHub actions.
- A complete list of recently published pull requests is also available.
The lightbulb logo is available in several sizes and variations.
Specifications
The latest drafts of
- XSLT Transformations (XSLT) Version 4.0
- XSLT Streaming Version 4.0
- XPath and XQuery Functions and Operators 4.0
- XML Path Language (XPath) 4.0, and
- XQuery 4.0: An XML Query Language
- XQuery and XPath Data Model 4.0
- XSLT and XQuery Serialization 4.0
- EXPath Binary Module 4.0
- EXPath File Module 4.0
are updated automatically when changes are accepted by the CG.
Grammar explorer
The grammar explorer is a set of pages that describe the various QT grammars and the relationships between the nonterminals and the specifications.
It is updated automatically when changes are accepted by the CG.
Stable drafts: 28 January 2026
At meeting 148, the Community Group agreed to publish a set of stable drafts. These drafts are a snapshot of the specifications representing the consensus of the group at the time of publication. They are published with a dated URL and will remain available at that URL so that users and implementors can refer to this as a versioned draft, confident that it won’t change. However, the work is not finished, and the specification is under active development. For links to the most recent specifications, see above.