Glossary
Searchable terminology from accessibility, web standards, and related fields.
212 results found in Web Accessibility.
- Tagged PDF (Structured PDF, Accessible PDF)
- A PDF document that contains semantic structure tags defining the logical reading order, headings, paragraphs, lists, tables, and figures — enabling screen readers and other assistive technologies to …
- Talking Browser (Talking Web Browser, Speaking Browser)
- A historical term for a specialised web browser that converts on-screen content into synthesised speech, enabling blind and low-vision users to browse the web through audio rather than through a separ…
- Task Automation (Web Task Automation, Browser Automation)
- The use of software agents or scripts to automatically perform web-based tasks on behalf of users, such as filling forms, making purchases, or extracting information. Task automation in accessibility …
- Task-Specific Navigation (Task-Based Browsing, Goal-Directed Navigation)
- A web interaction paradigm where the interface adapts to surface content relevant to a user's specific task or goal, filtering or de-emphasizing irrelevant elements. Task-specific navigation contrasts…
- Text Alternative (Alt Text, Alternative Text, Text Equivalent)
- A textual replacement for non-text content, primarily images, that conveys the same purpose or information as the visual element. Text alternatives are essential for users who cannot perceive images, …
- Text Alternatives (Text Alternative, Text Equivalent)
- WCAG 2.1 Guideline 1.1 and success criterion 1.1.1 require that all non-text content (images, charts, audio, video, form controls, etc.) have a text alternative serving the equivalent purpose. Text al…
- Text Reflow (Content Reflow, Responsive Text)
- The ability of text content to rearrange and wrap within its container when the viewport is resized or text is zoomed, so that users can read without horizontal scrolling. Text reflow is essential for…
- Text-Mode Browser (Text Browser, Terminal Browser, Console Browser)
- A web browser that renders web pages as text only, without displaying images or graphical layout, typically running in a command-line terminal or console environment. The most well-known text-mode bro…
- Time-Based Media (Multimedia Content, Synchronized Media)
- Content that unfolds over time, including audio, video, audio-video combinations, and interactive multimedia presentations. WCAG Guideline 1.2 requires that time-based media be made accessible through…
- Transformation Proxy (Transcoding Proxy, Web Accessibility Proxy)
- A transformation proxy is an intermediary server that sits between a user and the web, intercepting web pages and modifying their content before delivering them to the user's browser. In accessibility…
- Upper Ontology (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 …
- Usable Accessibility
- Usable accessibility is the principle that meeting technical accessibility standards (such as WCAG compliance) is necessary but not sufficient for ensuring that people with disabilities can effectivel…
- Verified Answer Marker (verified solution marker, accepted answer marker)
- A visible indicator on a forum or Q&A platform signalling that a particular reply has been confirmed as correct or useful — for example, Stack Overflow's green tick, Apple Discussion Forums' top-ranke…
- Vision User (VU, Sighted User)
- A person who primarily uses vision to access digital content, interacting with web pages and applications through visual scanning, mouse/trackpad pointing, and visual recognition of interface elements…
- Visual Fragmentation (Visual Grouping, Visually Fragmented Grouping)
- The design practice of organizing web page content into distinct visual groups using layout techniques such as background colors, tables, spacing, horizontal lines, and borders. Sighted users perceive…
- Visual Skimming (Visual Scanning, Page Scanning)
- The rapid visual process of scanning a page to quickly identify relevant content, key information, and areas of interest without reading every word. Sighted users can typically assess a webpage's rele…
- Voice Browser (Voice Web Browser, Audio Browser)
- A voice browser is a type of web browser that presents web content through speech output and accepts voice or keyboard input rather than relying on visual display. Voice browsers convert web page cont…
- Voice Usability (Auditory Usability, Non-Visual Web Usability)
- The degree to which a web page, application, or document is usable when accessed through a voice browser or screen reader — the audio-first counterpart to traditional visual usability. Voice usability…
- VoiceXML (Voice Extensible Markup Language, VXML)
- VoiceXML (Voice Extensible Markup Language) is a W3C standard markup language for creating voice-based user interfaces, particularly interactive voice response (IVR) systems and voice browsers. VoiceX…
- Voicemarking (Voice Bookmark, Speech-Based Bookmark)
- A speech-based technique for creating and retrieving semantic bookmarks in assistive web browsers. Users create voicemarks by speaking the name of a concept (e.g., "Major Headlines") and optionally a …