Metadata is structured data about data that helps to organize, track, and retrieve data. MARC 21 is the metadata standard for library cataloguing. Accessibility metadata helps patrons find resources that meet their specific accessibility needs.
Displaying accessibility metadata is becoming increasingly important as more digital content is born accessible. The User Experience Guide for Displaying Accessibility Metadata 1.0 discusses the importance of accessibility metadata for persons with print disabilities and how to display this information for readers.
Group under the W3C Community Group, outlines and instructs how to display the accessibility metadata of EPUBs. Library staff should use this resource when displaying their metadata for patrons.
The schema.org accessibility metadata helps readers find content with the accessible features they would like in a publication. The schema.org accessibility metadata can be added to the HTML using Resources Descriptive Framework (RDF), a semantic web standard, or EPUB 2, EPUB 3, and audiobooks to inform users of the accessible elements the content contains.