Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- SMILES(also: Simplified Molecular-Input Line-Entry System)
- A text-based notation system that represents chemical molecular structures as short character strings, making them both machine-readable and human-readable. For accessibility, SMILES is significant because it provides a linear, non-visual way to represent chemical structural…
- Semantic Annotation(also: Semantic Markup, Semantic Tagging)
- The process of adding machine-readable metadata to web content that describes the meaning of the content rather than its visual presentation. Unlike HTML markup which primarily specifies how content should be displayed (font size, color, layout), semantic annotations describe…
- Semantic Level(also: Semantic Content Level, Alt Text Semantic Level)
- A framework for categorizing the depth of information conveyed in alt text descriptions of data visualizations, introduced by Lundgard and Satyanarayan. The four levels are: Level 1 (construction details such as chart type, axes, and encodings), Level 2 (statistical properties…
- Shadow Page(also: Shadow Site, Text-Only Alternative)
- A separate, simplified version of a web page created specifically to meet accessibility requirements, typically offering a text-only or reduced-complexity version of the original content. While shadow pages can address some accessibility barriers, they are generally considered a…
- Single-Source Publishing(also: Single-Source Authoring, Multi-Channel Publishing)
- An authoring and publishing methodology where content is written and maintained in one master source and then automatically transformed into multiple output formats such as HTML, PDF, Braille, or mobile-optimized views. This approach is significant for accessibility because it…
- Slide Accessibility(also: Presentation Accessibility, Accessible Presentations, Accessible Slides)
- The practice of designing and delivering slide presentations so they can be fully accessed and understood by people with disabilities, particularly screen reader users. Key requirements include setting proper reading orders for slide elements, providing alt-text for images and…
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