Crosswalk

Updated November 2018

Accessibility metadata for digital books is drawn from four main sources, which are cross-walked here.

EPUB, Dublin Core, and ONIX

The EPUB Accessibility 1.0 specification defines the following metadata terms, some of which are also defined in ONIX:

EPUB Dublin Core ONIX
certifiedBy List: 196; Code: 98: Trusted Intermediary contact
certifierReport List: 196; Code: 94: Compliance web page for detailed accessibility information or, if a publisher is self-certifying, Code: 96: Publisher’s web page for detailed accessibility information
certifierCredential
dcterms:conformsTo WCAG-A conformsTo WCAG-A List: 196; Code: 02: Accessibility Specification 1.0 A
dcterms:conformsTo WCAG-AA conformsTo WCAG-AA List: 196; Code: 03: Accessibility Specification 1.0 AA

Schema.org and ONIX

Schema.org includes a large group of accessibility metadata properties which are referenced in the EPUB Accessibility 1.0 specification, some of which are also defined in ONIX:

schema.org ONIX
accessibilityFeature (vocabulary list follows) List 196 (specific codes follow)
    alternativeText List: 196; Code: 14: Short alternative descriptions
    annotations
    audioDescription
    bookmarks
    braille
    captions
    ChemML List: 196; Code: 18: Accessible chem content
    describedMath
    displayTransformability
    highContrastAudio
    highContrastDisplay
    index List: 196; Code: 12: Index navigation
    largePrint
    latex
    longDescription List: 196; Code: 15: Full alternative descriptions; 16: Visualised data also available as non-graphical data
    MathML List: 196; Code: 17: Accessible math content
    none
    printPageNumbers List: 196; Code: 19: Print-equivalent page numbering
    readingOrder List: 196; Code: 13: Reading order
    rubyAnnotations
    signLanguage
    structuralNavigation
    sychronizedAudioText List: 196; Code: 20: Synchronised pre-recorded audio
    tableOfContents List: 196; Code: 11: Table of contents navigation
    taggedPDF
    tactileGraphic
    tactileObject
    timingControl
    transcript
    ttsMarkup List: 196; Code: 21: Text-to-speech hinting provided; 22: Language tagging provided
    unlocked
accessibilityHazard (vocabulary list follows)
    flashing
    noFlashingHazard
    motionSimulation
    noMotionSimulationHazard
    sound
    noSoundHazard
    unknown
accessibilityAPI (vocabulary list follows)
    AndroidAccessibility
    ARIA
    ATK
    AT-SPI
    BlackberryAccessibility
    iAccessible2
    iOSAccessibility
    JavaAccessibility
    MacOSXAccessibility
    MSAA
    UIAutomation
accessibilityControl (vocabulary list follows)
    fullKeyboardControl
    fullMouseControl
    fullSwitchControl
    fullTouchControl
    fullVideoControl
    fullVoiceControl
accessMode (vocabulary list follows)
    auditory
    chartOnVisual List: 81; Code 19: Figures, Diagrams, Charts
    chemOnVisual
    colorDependent
    diagramOnVisual List: 81; Code 19: Figures, Diagrams, Charts
    mathOnVisual
    musicOnVisual
    tactile
    textOnVisual
    textual List: 81; Code: 10 combined with List: 196; Code: 10 means all text is actual text. List: 81; Code: 10 on its own (without List: 196; Code: 10) admits the possibility that the ‘text’ is inaccessible because it is an image of text.
    visual List: 81; Code: 07: Still images / graphics or Code: 18: Photographs or Code: 19: Figures, diagrams, charts, graphs or Code: 12: Maps and/or other cartographic content
accessModeSufficient (vocabulary list follows)
    auditory
    tactile
    textual
    visual
accessibilitySummary List: 196; Code: 00: Accessibility Summary
    Human-readable text

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