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Glossary · Accessibility

Web Content Accessibility Guidelines (WCAG)

W3C standard defining how to make web content perceivable, operable, understandable, and robust for users with disabilities.

Definition

In long form.

The Web Content Accessibility Guidelines, maintained by the W3C, are organized around four principles (POUR): perceivable, operable, understandable, and robust. Each principle is broken into success criteria at three conformance levels — A, AA, and AAA. The current normative version is WCAG 2.2, published October 2023. Most regulated buyers reference WCAG 2.1 AA or WCAG 2.2 AA in their procurement language. AAA is achievable on most flows but caps out for some interaction patterns.

In context

When a federal RFP says 'must conform to WCAG 2.1 AA', that's the conformance level you're committing to in your VPAT. Conformance is documented per-page (or per-template) and verified against each applicable success criterion.

Related terms

Adjacent definitions.

Section 508

Compliance

U.S. federal law requiring government information and communication technology to be accessible to people with disabilities.

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