Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- On Input(also: WCAG 3.2.2)
- WCAG 2.1 success criterion 3.2.2 (Level A) requires that changing the setting of any user interface component does not automatically cause a change of context (e.g., submitting a form, navigating to a new page, or moving focus to another component) unless the user has been…
- Online Accessibility Act(also: OAA, US Online Accessibility Act)
- A proposed US federal law (H.R. 1100, introduced in the 117th Congress) that would require consumer-facing websites and mobile apps of covered organisations to comply with Web Content Accessibility Guidelines (WCAG). The OAA is intended to close an ambiguity in the existing…
- Online Braille(also: Web Braille, Digital Braille, Electronic Braille)
- Online Braille refers to Braille content that is generated, distributed, or accessed through the Internet or digital platforms, as opposed to traditional embossed paper Braille. This includes web-based Braille translation services, downloadable Braille-formatted files such as…
- Opportunistic Accessibility(also: Opportunistic Accessibility Improvement)
- Opportunistic accessibility is an approach to improving digital accessibility in which enhancements are automatically applied to the maximum extent possible without causing negative side effects. Rather than treating accessibility as an all-or-nothing goal, opportunistic…
- Overlay Fact Sheet(also: Accessibility Overlay Fact Sheet)
- A public document signed by over 600 accessibility experts, lawyers, and contributors to web accessibility guidelines that critically evaluates the claims made by accessibility overlay vendors. The fact sheet argues that overlays do not adequately address the needs of disabled…
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