Glossary

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Accessibility Baseline(also: Baseline, Technology Baseline, WCAG Baseline)

An accessibility baseline, as used in WCAG 2.0 and later versions, is the set of technologies that a content author assumes are supported and enabled in the user agents (browsers and assistive technologies) used by their target audience. Authors must ensure that all content…

Accessibility Conformance Level(also: WCAG Conformance Level, Conformance Level)

Accessibility conformance levels are the tiered ratings defined by the Web Content Accessibility Guidelines (WCAG) to indicate the degree to which web content meets accessibility success criteria. WCAG defines three levels: Level A (minimum, addressing the most critical…

Accessibility-supported(also: Accessibility supported technology)

A WCAG 2.0 concept describing a web technology that has sufficient support from user agents (browsers) and assistive technologies to reliably convey accessibility information to users with disabilities. For a technology to be considered accessibility-supported, it must contain…

Accessible Authentication(also: WCAG 3.3.7, Accessible Authentication (Minimum))

A web accessibility requirement introduced in WCAG 2.2 (Success Criterion 3.3.7) that mandates for each step in an authentication process relying on a cognitive function test — such as remembering a password, solving a puzzle, or transcribing distorted text — at least one…

Alternative Text(also: Alt Text, Alt Attribute)

Text associated with an image that serves the same purpose and conveys the same essential information as the image. Alternative text is a fundamental web accessibility requirement specified in WCAG, enabling screen reader users to understand image content. Standards for writing…

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