Metadata Repository

A server-side system that stores and serves descriptive data about other resources — in accessibility contexts, typically information about web pages or their elements that helps assistive technology render them more usably. A metadata repository lets multiple tools share the same annotations (alt text, landmarks, ARIA patches, transcoding rules) rather than each project maintaining its own silo. Good repositories address schema extensibility, efficient URI-pattern lookup, authoring quality, and governance over who may edit which records. The Accessibility Commons project is a prominent example aimed specifically at web-accessibility remediation.