Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- UI Semantics(also: User Interface Semantics, Interface Semantics)
- The meaningful properties and roles of user interface elements that go beyond their visual appearance, including what an element does, how it can be interacted with, and its relationship to other elements. UI semantics are essential for accessibility because assistive…
- Upper Ontology(also: Foundation Ontology, Top-level Ontology)
- An upper ontology is a high-level, domain-independent ontology that describes very general concepts — such as 'object', 'role', 'event', 'time', or, in a web-accessibility context, generic structural roles like 'menu', 'navigation', 'content region', or 'decoration'. It is…
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