Glossary

Searchable terminology from accessibility, web standards, and related fields.

Abstract Syntax Tree (AST, Syntax Tree)

A hierarchical tree representation of source code structure that captures the syntactic relationships between programming constructs like functions, classes, loops, and statements. In accessibility, A…

• programming
• developer tools
• assistive technology

Audio Cue (Auditory Cue, Sound Cue, Earcon)

A non-speech sound used to convey information in an interface. In accessible programming environments, audio cues represent code structures, syntax errors, or navigation landmarks—for example, a door-…

• auditory interface
• assistive technology
• programming