This document crosswalks the accessibility metadata for Schema.org, EPUB, and ONIX.

EPUB and ONIX

The following table provides a crosswalk between the properties defined in the EPUB Accessibility specification [[EPUB-A11Y-11]] and the equivalents defined in the ONIX metadata standard [[ONIX]].

The conformsTo term used in EPUB is drawn from Dublin Core.

Unless stated otherwise, all code values are from ONIX code list 196.

EPUB ONIX

certifiedBy

certifierReport

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

Code 93: Compliance certification by

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.0 Level A

Code 04: EPUB Accessibility Specification 1.1

Code 80: WCAG v2.0

Code 84: WCAG level A

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.0 Level AA

Code 04: EPUB Accessibility Specification 1.1

Code 80: WCAG v2.0

Code 85: WCAG level AA

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.0 Level AAA

Code 04: EPUB Accessibility Specification 1.1

Code 80: WCAG v2.0

Code 86: WCAG level AAA

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.1 Level A

Code 04: EPUB Accessibility Specification 1.1

Code 81: WCAG v2.1

Code 84: WCAG level A

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.1 Level AA

Code 04: EPUB Accessibility Specification 1.1

Code 81: WCAG v2.1

Code 85: WCAG level AA

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.1 Level AAA

Code 04: EPUB Accessibility Specification 1.1

Code 81: WCAG v2.1

Code 86: WCAG level AAA

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.2 Level A

Code 04: EPUB Accessibility Specification 1.1

Code 82: WCAG v2.2

Code 84: WCAG level A

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.2 Level AA

Code 04: EPUB Accessibility Specification 1.1

Code 82: WCAG v2.2

Code 85: WCAG level AA

dcterms:conformsTo with the text string
EPUB Accessibility 1.1 - WCAG 2.1 Level AAA

Code 04: EPUB Accessibility Specification 1.1

Code 82: WCAG v2.2

Code 86: WCAG level AAA

dcterms:conformsTo with the URL http://www.idpf.org/epub/a11y/accessibility-20170105.html#wcag-a

Code 02: EPUB Accessibility Specification 1.0 A

dcterms:conformsTo with the URL http://www.idpf.org/epub/a11y/accessibility-20170105.html#wcag-aa

Code 03: EPUB Accessibility Specification 1.0 AA

Schema.org and ONIX

The following table provides a crosswalk between the Schema.org metadata and ONIX standard [[ONIX]].

Unless stated otherwise, all code values are from ONIX code list 196.

Schema.org ONIX
accessibilityFeature

alternativeText

Code 14: Short alternative descriptions

annotations

audioDescription

bookmarks (deprecated)

braille

captions

ChemML

Code 18: Accessible chem content

describedMath

displayTransformability

fullRubyAnnotations

highContrastAudio

highContrastDisplay

horizontalWriting

index

Code 12: Index navigation

largePrint

latex

longDescription

Code 15: Full alternative descriptions

Code 16: Visualised data also available as non-graphical data

MathML

Code 17: Accessible math content

none

pageBreakMarkers
(formerly printPageNumbers)

Code 19: Print-equivalent page numbering

pageNavigation

readingOrder

Code 13: Reading order

rubyAnnotations

signLanguage

structuralNavigation

sychronizedAudioText

Code 20: Synchronised pre-recorded audio

tableOfContents

Code 11: Table of contents navigation

taggedPDF

tactileGraphic

tactileObject

timingControl

transcript

ttsMarkup

Code 21: Text-to-speech hinting provided

Code 22: Language tagging provided

unknown

unlocked

verticalWriting

withAdditionalWordSegmentation

withoutAdditionalWordSegmentation

Code 22: Language tagging provided

Code 24: Dyslexia readability

Code 09: Inaccessible

Code 10: No reading system accessibility options disabled

accessibilityHazard

flashing

motionSimulation

sound

none

noFlashingHazard

noMotionSimulationHazard

noSoundHazard

unknown

unknownFlashingHazard

unknownMotionSimulationHazard

unknownSoundHazard

accessibilityAPI

AndroidAccessibility

ARIA

ATK

AT-SPI

BlackberryAccessibility

iAccessible2

iOSAccessibility

JavaAccessibility

MacOSXAccessibility

MSAA

UIAutomation

accessibilityControl

fullKeyboardControl

fullMouseControl

fullSwitchControl

fullTouchControl

fullVideoControl

fullVoiceControl

accessMode

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: "Text (eye-readable)" combined with List 196, Code 10: "No reading system accessibility options disabled (except)" means all text is actual text.

Note that 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
ONIX crosswalks are for instances where accessModeSufficient includes this vocabulary entry alone; combinations may occur but are more difficult to crosswalk

auditory

List 81, Code 01: Audiobook

tactile

textual

List 81, Code 10: "Text (eye-readable)" combined with List 196, Code 10: "No reading system accessibility options disabled (except)" means all text is actual text.

Note that 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

accessibilitySummary

accessibilitySummary

Code 00: Accessibility summary

Human-readable text

If present, include information from Codes:

  • 95: Trusted intermediary's web page for detailed accessibility information
  • 96: Publisher's web page for detailed accessibility information
  • 98: Trusted Intermediary contact
  • 99: Publisher contact for further accessibility information