Glossary
Searchable terminology from accessibility, web standards, and related fields.
87 results found in standards.
- ACT Rules (Accessibility Conformance Testing Rules, ACT-R)
- A set of standardized, machine-readable test rules developed by the W3C that provide specific, objective criteria for evaluating whether web content meets accessibility requirements like WCAG success …
- AD Guidelines (Audio Description Guidelines, AD Standards)
- Established rules and best practices that govern the creation of audio descriptions for video and live performances. AD guidelines cover aspects such as what to describe (actions, characters, settings…
- ADA Compliance (Americans with Disabilities Act Compliance)
- Adherence to the requirements of the Americans with Disabilities Act (ADA), a 1990 US civil rights law that prohibits discrimination against people with disabilities in public accommodations, employme…
- ARIA (Accessible Rich Internet Applications, WAI-ARIA)
- A W3C specification that provides a framework of roles, states, and properties to make dynamic web content and custom user interface controls accessible to assistive technologies. ARIA supplements HTM…
- ATAG (Authoring Tool Accessibility Guidelines)
- A W3C standard that provides guidelines for making authoring tools—such as content management systems, HTML editors, and website builders—both accessible to authors with disabilities and capable of pr…
- Access For All (ISO/IEC 24751, IMS Access For All, AfA)
- An international standard (ISO/IEC 24751) for describing user accessibility needs and preferences in a portable, application-independent format. Originally developed by the IMS Global Learning Consort…
- 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 Evaluation Framework (A11y Assessment Framework, Accessibility Testing Framework)
- A structured methodology for systematically assessing the accessibility of digital content, products, or services against established standards and guidelines. Effective frameworks define the criteria…
- Accessibility conformance report (ACR, VPAT, Voluntary Product Accessibility Template)
- A document that records the degree to which a product or service meets accessibility standards such as WCAG, Section 508, or EN 301 549. In enterprise settings, conformance reports are a primary deliv…
- Accessibility ontology (A11y ontology, Accessibility knowledge graph)
- A formal, structured representation of accessibility concepts, their properties, and the relationships between them, typically expressed in OWL (Web Ontology Language). Accessibility ontologies model …
- 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 PDF (Tagged PDF, PDF/UA)
- An accessible PDF is a Portable Document Format file that has been structured with tags, reading order, alternative text for images, and other metadata so that it can be navigated and read by assistiv…
- Adaptive Multi-Rate Codec (AMR, AMR Codec, AMR-NB, AMR-WB)
- A family of audio codecs used in mobile telephony to encode voice for transmission. AMR-NB (narrowband) operates at 300-3,400 Hz with bit rates from 4.75-12.2 kbps, while AMR-WB (wideband, also called…
- Americans with Disabilities Act (ADA, ADA 1990)
- The Americans with Disabilities Act (ADA) is landmark US civil rights legislation enacted in 1990 that prohibits discrimination against individuals with disabilities in all areas of public life, inclu…
- Audio description (AD, Described video, Video description)
- Narration added to a media soundtrack that describes important visual information — such as actions, characters, scene changes, and on-screen text — that cannot be understood from the main audio alone…
- BS 8878 (British Standard 8878, Web Accessibility Code of Practice)
- A British Standard published in 2010 that provides a code of practice for web accessibility. BS 8878 defines a 16-step process for implementing web accessibility within organisations, taking a user-ce…
- Braille Authority of North America (BANA)
- The standards-setting body responsible for establishing braille codes and guidelines for the production of braille materials in the United States and Canada. BANA publishes guidelines for tactile grap…
- Captioning Key (DCMP Captioning Key)
- A set of guidelines and best practices for creating high-quality captions, most notably published by the Described and Captioned Media Program (DCMP). The Captioning Key covers standards for caption a…
- Cognitive Accessibility Guidelines (COGA, Making Content Usable for People with Cognitive and Learning Disabilities)
- W3C guidance for making web content accessible to people with cognitive and learning disabilities, including intellectual disabilities, autism, dementia, ADHD, dyslexia, and dyscalculia. Published as …
- Cognitive accessibility (Cognitive a11y, COGA)
- The practice of designing digital content, interfaces, and interactions so they are usable by people with cognitive, learning, and neurological disabilities, including conditions such as dementia, int…