W3C UI Specification Schema Community Group

Document status: reviewed. Canonical source.

Summary

The group proposed a common implementation-agnostic meta-model for UI design, layout, behavior, constraints, accessibility and QA with a JSON/JSON-Schema deliverable and coordination with Open UI and DTCG. W3C records show the group closed on 21 May 2026.

NUIF relevance

The published remit overlaps NUIF’s proposed document semantics. The group page records closure but gives no causal account; closure does not establish that a schema-centered approach is technically inadequate. NUIF’s use of executable semantics, conformance fixtures and source synchronization is a repository design choice. Its usefulness requires separate implementation and external workflow evidence.