Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- VPAT(also: Voluntary Product Accessibility Template, Accessibility Conformance Report, ACR)
- A standardized document in which vendors report how well their product or service conforms to accessibility standards such as WCAG, Section 508, and EN 301 549. Originally created by the Information Technology Industry Council (ITI), VPATs help procurement teams assess the…
- Verbatim Captioning(also: Verbatim Captions)
- A captioning approach that reproduces every spoken word exactly as uttered, including filler words, false starts, and repetitions. Regulators in many countries (e.g., the Canadian CRTC, the US FCC) emphasize verbatim accuracy as a quality requirement. Verbatim captions preserve…
- Verifiable Credential(also: VC)
- A cryptographically signed statement about a person, organisation, or object that a relying party can verify without contacting the issuer, following the W3C Verifiable Credentials Data Model. Verifiable credentials are the underlying data format used by identity wallets, and…
- Voice over LTE(also: VoLTE, LTE Voice, HD Voice)
- A standard for transmitting voice calls over 4G LTE mobile networks using IP-based protocols rather than legacy circuit-switched networks. VoLTE typically uses the AMR-WB codec, enabling wideband HD voice quality that significantly benefits people with hearing loss. The improved…
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