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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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Table accessibility(also: Accessible tables, Data table accessibility)
The practice of structuring data tables so they can be understood by assistive technology users. Accessible tables require proper markup that distinguishes header cells from data cells, establishes relationships between headers and the data they describe, provides captions or…
Tooltip(also: Form Field Tooltip, Accessible Name (PDF))
In PDF forms, a tooltip is the programmatic label associated with a form field that assistive technologies read aloud when the user reaches that field. Unlike HTML, PDF does not have a native label-to-field association, so the tooltip carries the accessible name. Best practice…

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