WCAG
WCAG, the Web Content Accessibility Guidelines, is the standard for accessible web content.
Definition
WCAG, the Web Content Accessibility Guidelines, is the standard for accessible web content. It has levels A, AA and AAA, and AA is the usual target.
Use case
Many laws and contracts refer to WCAG AA, so it becomes your working checklist.
Related terms
Documentation
WCAG 2 Overview
The official overview of versions 2.0, 2.1 and 2.2.