Glossary
Searchable terminology from accessibility, web standards, and related fields.
178 results found in web accessibility.
- Table accessibility (Accessible tables, Data table accessibility)
- The practice of structuring data tables so they can be understood by assistive technology users. Accessible tables require proper markup that distinguishes header cells from data cells, establishes re…
- Table navigation (Table browsing, Grid navigation)
- A set of screen reader commands that allow users to move between cells, rows, and columns within HTML tables, hearing row and column headers announced for context at each position. Effective table nav…
- Target Size (Touch Target Size, Click Target Size, Hit Area)
- The physical dimensions of an interactive element on screen — such as a link, button, or checkbox — that a user must point to and activate. Adequate target size is critical for users with motor impair…
- Text Justification (Text Alignment, Justified Text)
- The alignment of text along the left and/or right margins of a text block. Left-aligned (ragged right) text has even spacing between words and an uneven right edge, while fully justified (left-right) …
- Text-Only Browser (Text Browser, Text-Based Browser)
- A web browser that renders pages as plain text without images, styling, or complex layouts, displaying only the textual content and link structure. Examples include WebbIE, Lynx, and Links. Text-only …
- Topic Segmentation (Text Segmentation, Topicalisation)
- A natural language processing technique that automatically divides a document into coherent sections based on changes in topic or subject matter. Topic segmentation algorithms detect boundaries where …
- Touch target (Tap target, Touch target size, Target size)
- The interactive area on a touchscreen or pen-based display that responds to user input when tapped or pressed. Touch target size is a critical accessibility consideration because targets that are too …
- Transcoding (Content transcoding, Web transcoding)
- The process of converting or transforming web content from one format or structural representation to another to improve accessibility. In the context of screen reader access, transcoding can involve …
- UAAG (User Agent Accessibility Guidelines)
- A set of guidelines from the W3C Web Accessibility Initiative that explains how to make user agents — browsers, media players, and other applications that render web content — accessible to people wit…
- UI Agent (User Interface Agent, Browser Agent, AI Agent)
- An AI-powered software system that can autonomously interact with graphical user interfaces on behalf of a user, performing tasks by interpreting natural language commands and translating them into in…
- User Agent (Browser, Web Browser)
- In web accessibility, a user agent is any software that retrieves, renders, and facilitates user interaction with web content. This includes mainstream web browsers like Chrome, Firefox, and Safari, a…
- User-Generated Content (UGC, Prosumer Content)
- Web content created and published by non-technical users through platforms like blogs, social media, wikis, and content management systems, rather than by professional web developers. The rise of user…
- User-Generated Content Accessibility (UGC Accessibility)
- The practice of ensuring that user-generated content such as online reviews, forum posts, comments, and social media contributions is accessible to people with disabilities. Unlike curated website con…
- Violation Score (Accessibility Score, A11y Score)
- A numerical metric used to quantify the severity and prevalence of accessibility violations on a web page or within a dataset. Violation scores typically map qualitative impact levels (cosmetic, minor…
- Violation Severity (Accessibility Violation Severity, Barrier Severity)
- A measure of how significantly an accessibility violation impacts users with disabilities, typically rated on a scale from no violation to critical barrier. In accessibility evaluation, violation seve…
- Vision-based Page Segmentation (VIPS)
- A web page segmentation algorithm that uses both the source code and the visual presentation of a web page to divide it into hierarchical visual blocks. VIPS produces a tree structure where the root n…
- Voice Augmentation (Audio Augmentation, Voice-Based Augmentation)
- A technique for enhancing user interfaces by adding spoken audio feedback to supplement visual information on screen. Voice augmentation provides contextual support through spoken confirmations of use…
- VoxLens
- An open-source JavaScript plug-in developed at the University of Washington that improves the accessibility of online data visualizations for screen-reader users through a multimodal approach. VoxLens…
- W4A (International Cross-Disciplinary Conference on Web Accessibility, Web for All)
- An annual research conference focused specifically on web accessibility, held in conjunction with the World Wide Web Conference (WWW/TheWebConf). W4A brings together researchers studying how to make t…
- WAVE (WAVE Web Accessibility Evaluation Tool)
- A suite of web accessibility evaluation tools developed by WebAIM (Web Accessibility In Mind) that identifies accessibility and WCAG errors in web pages. WAVE provides visual feedback by injecting ico…