Glossary
Searchable terminology from accessibility, web standards, and related fields.
178 results found in web accessibility.
- AChecker (IDI Web Accessibility Checker)
- An open-source web accessibility evaluation tool that checks HTML content against accessibility standards including WCAG 2.0. AChecker identifies three types of issues: known problems (definite violat…
- AI Coding Assistant (AI Pair Programmer, Code Copilot)
- An artificial intelligence tool integrated into code editors that assists developers by generating code suggestions, completing code snippets, and answering programming questions using large language …
- AODA (Accessibility for Ontarians with Disabilities Act)
- Canadian provincial legislation enacted in 2005 that sets out a roadmap to make Ontario fully accessible by 2025. AODA establishes mandatory accessibility standards across five areas: customer service…
- Access to Information (Information Access)
- In the context of web accessibility, the concept that certain accessibility criteria are fundamentally about whether users can reach and perceive content at all, as distinct from criteria that improve…
- AccessiWeb (AccessiWeb Reference List)
- A French web accessibility methodology and reference list developed by BrailleNet, providing a practical application framework based on WCAG. AccessiWeb translates WCAG success criteria into testable …
- Accessibility API Mapping (AAM, Accessibility API Mappings, Acc API Mapping)
- Accessibility API Mappings (AAMs) are W3C specifications that define how the semantics of web content technologies — such as HTML, SVG, and WAI-ARIA — correspond to features in platform accessibility …
- Accessibility Audit (Accessibility Review, A11y Audit)
- A structured evaluation of a digital product, website, or application against established accessibility standards, typically WCAG, to identify barriers that prevent people with disabilities from using…
- Accessibility Metrics (Web Accessibility Metrics, Accessibility Scores, Accessibility Measurement)
- Quantitative methods for measuring and scoring the accessibility level of websites or digital content. Accessibility metrics typically work by evaluating web pages against checkpoints derived from sta…
- Accessibility Overlay (A11y Overlay, Accessibility Widget, Accessibility Plugin)
- A third-party software product that applies a layer of JavaScript over a website claiming to automatically fix accessibility issues, typically through a toolbar widget offering features like text resi…
- Accessibility Policy (Web Accessibility Policy, Digital Accessibility Policy)
- A formal organizational document that defines an institution's commitment to digital accessibility, typically specifying the standards to be followed (such as WCAG conformance levels), roles and respo…
- Accessibility Retrofitting (Retrofitting, Accessibility Remediation)
- The process of modifying existing products, websites, buildings, or systems after the fact to make them accessible to people with disabilities. Retrofitting is typically more expensive, time-consuming…
- Accessibility Violation (A11y Violation, Accessibility Error, Accessibility Issue)
- Any instance where web content, code, or design fails to conform to established accessibility guidelines such as WCAG. Accessibility violations can be syntactic (missing required HTML elements or attr…
- Accessibility overlay (Accessibility widget, Accessibility plugin, Overlay tool)
- A software layer, typically implemented as a JavaScript widget or browser extension, that applies modifications to a website's presentation or behavior with the goal of improving accessibility. Overla…
- Accessible Authentication (WCAG 3.3.7, Accessible Authentication (Minimum))
- A web accessibility requirement introduced in WCAG 2.2 (Success Criterion 3.3.7) that mandates for each step in an authentication process relying on a cognitive function test — such as remembering a p…
- Accessible Data Table (Accessible Table, Screen Reader-Friendly Table)
- A data table designed and implemented to be effectively navigable and comprehensible by screen reader users. Accessible data tables require proper HTML markup including table headers (th elements), sc…
- Accordion Interface (Accordion Widget, Collapsible Sections, Disclosure Widget)
- A user interface pattern that presents content in vertically stacked sections, each with a header that can be expanded or collapsed to show or hide the associated content. Accordions are particularly …
- ActionScript
- A programming language used within Adobe Flash to create interactive content, animations, and web applications. ActionScript code was compiled into bytecode embedded in SWF files and executed by the F…
- Adobe Flash (Flash Player, Flash, Macromedia Flash, SWF)
- A discontinued multimedia software platform formerly used to create animations, rich internet applications, games, and video players embedded in web pages. Flash content was notoriously inaccessible t…
- Alt Text (Alternative Text, Alt Attribute, Image Description)
- A textual description of an image that is embedded in the HTML code and read aloud by screen readers, providing blind and low vision users with information about visual content. Effective alt text is …
- Alt Text Authoring (Alt Text Writing, Image Description Authoring)
- The process of composing alternative text descriptions for digital images, undertaken by content authors, developers, or dedicated accessibility specialists. Research has identified several barriers t…