Standards and expert research sources

Fetch only from the domains listed here; do not discover other sources by web search. Availability and research outcomes belong in the current research.md,...

Fetch only from the domains listed here; do not discover other sources by web search. Availability and research outcomes belong in the current research.md, not this maintained list.

Standards

Check the APG pattern whenever the component has one. Check WCAG and WAI-ARIA when a Decision topic needs a normative requirement.

SourceOfficial documentation
W3C WAI-ARIA Authoring Practices Guide (APG)Patterns index (find the component’s pattern here)
W3C Web Content Accessibility Guidelines (WCAG)w3.org/TR/WCAG22
W3C WAI-ARIAw3.org/TR/wai-aria

Expert research

Advisory only. Check when a Decision topic is a choice or boundary question, or when the design-system research is silent or contradictory on a topic.

SourceOfficial documentation
Nielsen Norman Group (NN/g)Design patterns topic (start here, then follow article links on nngroup.com)