Currently published as Candidate Recommendation:
- WAI-ARIA 1.0 (Technical Specification)
- WAI-ARIA 1.0 Primer
- WAI-ARIA 1.0 Authoring Practices
- WAI-ARIA 1.0 User Agent Implementation Guide
- WAI-ARIA 1.0 Roadmap
Up-to-date information: http://w3.org/WAI/intro/aria