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Schema.org Accessibility Metadata

    Creator: Accessible Publishing Knowledge Base

    Date Updated: January 9, 2023

    Overview

    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.

    The information in this resource is summarized from the Schema.org Accessibility Metadata web page.

    Quick Facts

    The schema.org accessibility metadata properties most commonly used are:

    • accessibilityFeature represents the accessibility features that the content contains, such as alternative text, braille, audio descriptions, described Math, page navigation, and much more.
    • accessibilityHazard describes if there is a hazard for readers in the materials (e.g., flashing lights, motion stimulation, etc.). This property can have the value “none” if there are no hazards.
    • accessibilitySummary contains the summary of accessibility features present (and not present) in the document/materials. For example, images have short descriptions, but long descriptions must be provided.
    • accessMode is the mode by which the information is communicated to the reader. The values for this property are auditory, textual, tactile, and visual.
    • accessModeSufficient is for the modes that are sufficient for readers to understand the content of a resource. It has the same values as accessMode – auditory, textual, tactile, and visual. This property can contain more than one value.

    Visit the Schema.org Accessibility Metadata web page.

    References

    Accessible Publishing Knowledge Base. (n.d.). accessibilityFeature. Accessible Publishing Knowledge Base. Retrieved January 9, 2023, from http://kb.daisy.org/publishing/docs/metadata/schema.org/accessibilityFeature.html

    Accessible Publishing Knowledge Base. (n.d.). accessibilityHazard. Accessible Publishing Knowledge Base. Retrieved January 9, 2023, from http://kb.daisy.org/publishing/docs/metadata/schema.org/accessibilityHazard.html

    Accessible Publishing Knowledge Base. (n.d.). accessibilitySummary. Accessible Publishing Knowledge Base. Retrieved January 9, 2023, from http://kb.daisy.org/publishing/docs/metadata/schema.org/accessibilitySummary.html

    Accessible Publishing Knowledge Base. (n.d.). AccessMode. Accessible Publishing Knowledge Base. Retrieved January 9, 2023, from http://kb.daisy.org/publishing/docs/metadata/schema.org/accessMode.html

    Accessible Publishing Knowledge Base. (n.d.). AccessModeSufficient. Accessible Publishing Knowledge Base. Retrieved January 9, 2023, from http://kb.daisy.org/publishing/docs/metadata/schema.org/accessModeSufficient.html

    Accessible Publishing Knowledge Base. (n.d.). Schema.org Accessibility Metadata. Accessible Publishing Knowledge Base. Retrieved January 9, 2023, from http://kb.daisy.org/publishing/docs/metadata/schema.org/index.html