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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Accessibility API(also: Accessibility Application Programming Interface, Platform Accessibility API)
A software interface provided by operating systems and browsers that exposes information about user interface elements — including their roles, states, properties, and relationships — to assistive technologies such as screen readers. Accessibility APIs (e.g., Microsoft UI…
Accessibility Object Model(also: AOM)
The Accessibility Object Model (AOM) is a proposed W3C web standard that aims to give JavaScript developers direct programmatic access to the browser's accessibility tree. While WAI-ARIA allows authors to annotate HTML with accessibility semantics through markup attributes, the…
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…
Aural CSS(also: Aural Cascading Style Sheets, CSS Aural Properties, CSS Speech)
Aural CSS refers to CSS properties designed to control the auditory presentation of web content, originally specified as the "aural" media type in CSS2 and later revised as the "speech" media type in CSS3. These properties allow web authors to specify how content should be…

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