Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Reference Sonification(also: Audio reference tone, Origin tone)
- A sonification design pattern in which a fixed, recognisable audio tone represents a known landmark - typically the origin of a coordinate system or another anchor point - and can be re-played on demand so that a user exploring a non-visual data space can re-orient themselves…
- Relational Diagram(also: Relational Information Display, RID)
- A graphical representation that depicts items (nodes) and the relationships (links) between them using a two-dimensional spatial layout. Common forms include entity-relationship diagrams, flowcharts, state diagrams, network diagrams, and mind maps. Relational diagrams encode…
- Relief Chart(also: 3D Chart, Haptic Chart, Relief Graph)
- A tactile data visualization that uses height (the third dimension) to encode data values, making charts accessible to people with visual impairments through touch. Unlike flat tactile graphics that use only texture or raised lines, relief charts represent data magnitude through…
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