Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- OpenType(also: OpenType Font)
- A font format developed by Microsoft and Adobe that supports advanced typographic features including glyph substitution (GSUB) and glyph positioning (GPOS). OpenType fonts are critical for correctly rendering complex scripts such as Indian languages, Arabic, and Thai, where the…
- Orthographic Depth(also: Orthographic Transparency, Spelling Transparency)
- The degree of consistency in the relationship between letters (graphemes) and sounds (phonemes) in a writing system. Languages with shallow or transparent orthography — like Finnish, Spanish, and Italian — have highly consistent letter-to-sound mappings, meaning words are…
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