Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- ARIA Live Region(also: Live Region, ARIA Live)
- An ARIA live region is a section of a web page marked with the aria-live attribute that announces dynamic content changes to assistive technologies without requiring user focus to move to the updated area. Live regions are essential for making real-time updates — such as status…
- Accessibility Focus(also: A11y Focus, Screen Reader Focus)
- The currently selected element in a user interface as perceived by a screen reader or other assistive technology. When an element has accessibility focus, the screen reader announces its description and the user can interact with it. Only one element can have accessibility focus…
- Accessibility Tree(also: A11y Tree, Accessible Tree)
- A hierarchical data structure maintained by operating systems and browsers that represents the accessible elements of a user interface in a form that assistive technologies can interpret. The accessibility tree is derived from the visual UI but organized logically rather than…
- Audio Interference(also: Audio Conflict, Speech Conflict)
- Audio interference in a digital accessibility context is the overlap of two or more sound streams in a user's environment such that one masks another — most commonly, auto-playing media audio on a webpage drowning out a screen reader's synthesized speech. Because most consumer…
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