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

This is direct prior art and evidence that the problem is recognized. NUIF should study why a schema-only standards effort failed to sustain momentum and differentiate through executable semantics, renderer/layout reference implementations, conformance fixtures, bidirectional synchronization and neutral editor proof rather than a field catalog alone.