Accessibility Properties Crosswalk (schema.org, ONIX, MARC21 & UNIMARC)

This document is a work in progress to extends the existing crosswalk for accessibility metadata for Schema.org, EPUB, and ONIX to MARC21 and UNIMARC.

It also adds a definition column.

Note : UNIMARC 231i (pdf file) offers a easy mapping to ONIX 196. Some references may be best described by other UNIMARC codes.

Definition	EPUB	ONIX	EPUB to MARC21	ONIX to MARC21	UNIMARC
Identifies a party responsible for the testing and certification of the accessibility of an EPUB publication.	certifiedBy	List 196: Code 93: Compliance certification by `ProductFormFeatureDescription` carries the URL of a web page belonging to the organisation responsible for compliance testing and certification of the product – typically a ‘home page’ or a page describing the certification scheme itself. For use in ONIX 3.0 only	532 8# Accessibility Note (Non-specific)	532 8# Accessibility Note$a	231 ##$i93$2onix196
f the evaluator provides a publicly-readable report of its assessment, provide a link to the assessment in an a11y:certifierReport property associated with [epub-3] the evaluator's name..	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	532 8# Accessibility Note (Non-specific) 856 - Electronic Location and Access 856 42 $3Certifier report$u[URL to Certifier report]	532 8# Accessibility Note$a	231 ##$i94$2onix196 and/or 231 ##$i96$2onix196
Identifies a credential or badge that establishes the authority of the party identified in the associated certifiedBy property to certify content accessible..	certifierCredential	–	532 8# Accessibility Note (Non-specific)
An established standard to which the described resource conforms.	dcterms:conformsTo with the URL `http://www.idpf.org/epub/a11y/accessibility-20170105.html#wcag-a`	List: 196; Code: 02: EPUB Accessibility Specification 1.0 A	532 8# Accessibility Note (Non-specific)	532 8# Accessibility Note$a	231 ##$i02$2onix196
An established standard to which the described resource conforms.	dcterms:conformsTo with the URL `http://www.idpf.org/epub/a11y/accessibility-20170105.html#wcag-aa`	List: 196; Code: 03: EPUB Accessibility Specification 1.0 AA	532 8# Accessibility Note (Non-specific)	532 8# Accessibility Note$a	231 ##$i03$2onix196

From Schema.org

The following table provides a crosswalk between the Schema.org metadata and [[ONIX]], MARC21, UNIMARC.

accessibilityFeature

ONIX: List 196 (specific codes follow)

MARC21: would not map. Mapping of individual properties is possible as reflected in the following table

UNIMARC: Easy mapping thru list 231 allowing reference to any ONIX list and code.

Definition	Schema.org	ONIX	MARC21	UNIMARC
Alternative text is provided for visual content (e.g., via the [HTML] alt attribute).	alternativeText	List: 196; Code: 14: Short alternative descriptions	341 0# $avisual$balternativeText$2sapdv or 341 0# $aaudio$bcaptions$2sapdv	231 ##$i14$2onix196
The work includes annotations from the author, instructor and/or others.	annotations	–	341 0# $atextual$bannotations $2 sapdv or 532 8# $a This resource includes annotations from the author, instructor and/or others.
Audio descriptions are available (e.g., via an [HTML] track element with its kind attribute set to "descriptions").	audioDescription	–	341 0# $avisual$daudioDescription$2sapdv
(deprecated). The work includes bookmarks to facilitate navigation to key points. Note: The use of the bookmarks value is now deprecated due to its ambiguity. For PDF bookmarks, the tableOfContents value should be used instead. For bookmarks in ebooks, the annotations value can be used.	bookmarks	N/A (Reading system feature)	341 0# $atextual$bbookmarks$2sapdv
[1] The content is in braille format, or [2] alternatives are available in braille. Note: Information about the type of braille (e.g., ASCII, unicode, nemeth), whether the braille is contracted or not, and what code the braille conforms to should be provided in the accessibility summary.	braille	–	Use Case [1] (the content is in Braille format) Not Applicable. Natively braille resources are described using a number of fields in MARC21. Use Case [2] (alternatives are available in Braille): 341 0# $atext$ebraille
Indicates that synchronized captions are available for audio and video content.	captions	–	341 0# $aauditory$bcaptions$2sapdv or 341 0# $avisual$bcaptions$2sapdv
Identifies that chemical information is encoded using the ChemML markup language.	ChemML	List: 196; Code: 18: Accessible chem content	341 0# $avisual$bChemML$2sapdv	231 ##$i18$2onix196
Textual descriptions of math equations are included, whether in the alt attribute for image-based equations, using the `alttext` attribute for [MathML] equations, or by other means.	describedMath	–	341 0# $avisual$bdescribedMath$2sapdv
Display properties are controllable by the user. This property can be set, for example, if custom CSS style sheets can be applied to the content to control the appearance. It can also be used to indicate that styling in document formats like Word and PDF can be modified.	displayTransformability	List: 175 ; Code: E200: Reflowable.	341 0# $atextual$b displayTransformability$2sapdv	231 ## $iE200$2onix175
Audio content with speech in the foreground meets the contrast thresholds set out in WCAG Success Criteria 1.4.7.	highContrastAudio	–	3410$aauditory$dhighContrastAudio$2sapdv
Content meets the visual contrast threshold set out in WCAG Success Criteria 1.4.6.	highContrastDisplay	–	3410#$atextual$b highContrastDisplay$2sapdv or 3410#$avisual$c highContrastDisplay$2sapd
The work includes an index to the content.	index	List: 196; Code: 12: Index navigation	3410#$atextual$bindex$2sapdv	231 $i12$2onix196
The content has been formatted to meet large print guidelines. The property is not set if the font size can be increased. See displayTransformability.	largePrint	–	3410#$atextual$blargePrint$2sapdv 007 pos 00 Text pos 01Specific material designation b Large print 008 Books/Music pos 23 form of item d Large print 008 Cartographic Pos 29 d Large print 340 ## $nLarge print (18 point)$2rdafs
Identifies that mathematical equations and formulas are encoded in the LaTeX typesetting system.	latex	–	3410#$avisual$blatex$2sapdv
Descriptions are provided for image-based visual content and/or complex structures such as tables, mathematics, diagrams, and charts. Note: Authors may set this property independent of the method they use to provide the extended descriptions (i.e., it is not required to use the obsolete [HTML] longdesc attribute).	longDescription	List: 196; Code: 15: Full alternative descriptions; 16: Visualised data also available as non-graphical data	3410#$avisual$blongDescription$2sapdv 3410#$avisual$bDescribed video$2sapdv 3410#$aauditory$bcaptions$2sapdv 3410#$aauditory$btranscript$2sapdv	231 $i15$2onix196
Identifies that mathematical equations and formulas are encoded in [MathML].	MathML	List: 196; Code: 17: Accessible math content	3410#$avisual$bMathML$2sapdv	231 $i17$2onix196
Indicates that the resource does not contain any accessibility features. The none value must not be set with any other feature value.	none	–	No mapping
The work includes equivalent print page numbers. This setting is most commonly used with ebooks for which there is a print equivalent.	printPageNumbers	List: 196; Code: 19: Print-equivalent page numbering	3410#$atextual$bprintPageNumbers$2sapdv	231 $i19$2onix196
The reading order of the content is clearly defined in the markup (e.g., figures, sidebars and other secondary content has been marked up to allow it to be skipped automatically and/or manually escaped from.	readingOrder	List: 196; Code: 13: Reading order	3410#$atextual$breadingOrder$2sapdv	231 $i13$2onix196
Indicates that `ruby` annotations [HTML] are provided in the content. Ruby annotations are used as pronunciation guides for the logographic characters for languages like Chinese or Japanese. It makes difficult Kanji or CJK ideographic characters more accessible. The absence of `rubyAnnotations` implies that no CJK ideographic characters have ruby.	rubyAnnotations	–	3410#$atextual$brubyAnnotations$2sapdv
Sign language interpretation is available for audio and video content. Note: Information about the sign language code used should be provided in the accessibility summary.	signLanguage	–	3410#$aauditory$csignLanguage$2sapdv
The use of headings in the work fully and accurately reflects the document hierarchy, allowing navigation by assistive technologies.	structuralNavigation	–	3410#$atextual$bstructuralNavigation$2sapdv
Describes a resource that offers both audio and text, with information that allows them to be rendered simultaneously. The granularity of the synchronization is not specified. This term is not recommended when the only material that is synchronized is the document headings.	synchronizedAudioText	List: 196; Code: 20: Synchronised pre-recorded audio	3410#$atextual$d sychronizedAudioText$2sapdv	231 $i20$2onix196
The work includes a table of contents that provides links to the major sections of the content.	tableOfContents	List: 196; Code: 11: Table of contents navigation	3410#$atextual$btableofContents$2sapdv	231 $i11$2onix196
The contents of the PDF have been tagged to permit access by assistive technologies.	taggedPDF	–	3410#$atextual$btaggedPDF$2sapdv
[1] When used with creative works such as books, indicates that the resource includes tactile graphics. [2] When used to describe an image resource or physical object, indicates that the resource is a tactile graphic.	tactileGraphic	–	Use case [1] (When used with creative works such as books, indicates that the resource includes tactile graphics): 3410#$avisual$etactileGraphic$2sapd Use case [2] (When used to describe an image resource or physical object, indicates that the resource is a tactile graphic): 500 - Note ; 500 $a Tactile graphic And 336 Content type ; 336 ##$atactile image$2rdacontent
[1] When used with creative works such as books, indicates that the resource includes models to generate tactile 3D objects. [2] When used to describe a physical object, indicates that the resource is a tactile 3D object.	tactileObject	–	Use case [1] (When used with creative works such as books, indicates that the resource includes models to generate tactile 3D objects): 532 1# $aIncludes models to generate 3D objects Use case [2] (When used to describe a physical object, indicates that the resource is a tactile 3D object): Leader pos 6 r Three-dimensional artifact or naturally occurring object and 500 $aTactile 3D object. 336 ##$atactile three-dimensional form$2rdacontent
For content with timed interaction, this value indicates that the user can control the timing to meet their needs (e.g., pause and reset)	timingControl	–	341$aauditory$dtimingControl$2sapdv or 341$avisual$dtimingControl$2sapdv
Indicates that a transcript of the audio content is available.	transcript	–	341$aauditory$btranscript$2sapdv
One or more of [SSML], [Pronunciation-Lexicon], and [CSS3-Speech] properties has been used to enhance text-to-speech playback quality.	ttsMarkup	List: 196; Code: 21: Text-to-speech hinting provided; Code 22: Language tagging provided	341$atext$bttsMarkup$2sapdv and 532 1# $a Text-to-speech has been optimised through provision of PLS lexicons, SSML or CSS Speech synthesis hints.	231 $i21$2onix196 and/or 231 $i22$2onix196
No digital rights management or other content restriction protocols have been applied to the resource.	unlocked	–	532 1# $aNo DRM (digital rights management) or other content restriction protocols have been applied to the resource.
ONIX: The language of the text has been specified (eg via the HTML or XML lang attribute) to optimise text-to-speech (and other alternative renderings), both at whole document level and, where appropriate, for individual words, phrases or passages in a different language.	–	List: 196; Code 22: Language tagging provided – helps with TTS in multi-lingual content	532 1# $aThe language of the text has been specified (eg via the HTML or XML lang attribute) to optimise text-to-speech (and other alternative renderings), both at whole document level and, where appropriate,for individual words, phrases or passages in a different language.	231 $i22$2onix196
ONIX: Specialised font, character and/or line spacing, justification and paragraph spacing, coloring and other options provided specifically to improve readability for dyslexic readers. Details, including the name of the font if relevant, should be listed in `ProductFormFeatureDescription`	–	List: 196; Code 24: Dyslexia readability	532 1# $aSpecialised font, character and line spacing, justification and paragraph spacing, and coloring for dyslexic readers.
ONIX: Known to lack significant features required for broad accessibility. For use in ONIX 3.0 only	–	List: 196; Code 09: Inaccessible	532 2# $aLacks significant accessibility features.	231 $i09$2onix196
ONIX: No accessibility features offered by the reading system, device or reading software (including but not limited to choice of text size or typeface, choice of text or background color, text-to-speech) are disabled, overridden or otherwise unusable with the product EXCEPT – in ONIX 3 messages only – those specifically noted as subject to restriction or prohibition in `EpubUsageConstraint`. Note that provision of any significant part of the textual content as images (ie as pictures of text, rather than as text, and without any textual equivalent) inevitably prevents use of these accessibility options.	–	List: 196; Code 10: No reading system accessibility options disabled (except)	532 8# $aNo accessibility features offered by the reading system, device or reading software (including but not limited to choice of text size or typeface, choice of text or background color, text-to-speech) are disabled, overridden or otherwise unusable with the product.	231 $i10$2onix196

accessibilityHazard

Definition	Schema.org	ONIX	MARC21	UNIMARC
Indicates that the resource presents a flashing hazard for photosensitive persons. This value should be set when the content meets the hazard thresholds described in Success Criterion 2.3.1 Three Flashes or Below Threshold [WCAG2].	flashing	–	532 8# $aThe resource presents a flashing hazard for photosensitive persons.
Indicates that the resource does not present a flashing hazard. This value should be set when the content conforms to Success Criterion 2.3.1 Three Flashes or Below Threshold [WCAG2].	noFlashingHazard	–	532 8# $aThis resource does not present a flashing hazard.
Indicates that the resource contains instances of motion simulation that may affect some individuals. Some examples of motion simulation include video games with a first-person perspective and CSS-controlled backgrounds that move when a user scrolls a page.	motionSimulation	List: 143; Code: 17 WARNING – Motion simulation hazard Products simulates (via visual effects) the experience of motion, which may cause nausea in sensitive people	532 8# $aContains instances of motion simulation that may affect some individuals.	231 $i17$2onix143
Indicates that the resource does not contain instances of motion simulation.	noMotionSimulationHazard	–	532 8# $aThis resource does not contain instances of motion simulation.
Indicates that the resource contains auditory sounds that may affect some individuals. Editor's note: The application of this value is currently under discussion as its application is underspecified.	sound	List: 175; Code: A310: Sound effects Incidental sounds added to the audiobook narration (eg background environmental sounds). (may not correspond to a hazard)	532 8# $aContains auditory sounds that may affect some individuals.	231 $iA310$2onix175
Indicates that the resource does not contain auditory hazards. Editor's note: The application of this value is currently under discussion as its application is underspecified.	noSoundHazard	–	532 8# $aThis resource does not contain auditory hazards.
Indicates that the resource does not contain any hazards.	none	–
Indicates that the author is not able to determine if the resource presents any hazards.	unknown	–	532 8# $aThis resource has not been evaluated for hazard risks.

accessibilityAPI (Recommend Removal)

Definition	Schema.org	ONIX	MARC21
Indicates the resource is compatible with the Android Access API.	AndroidAccessibility	–	532 0# $aResource is compatible with the Android Accessibility API.
Indicates the resource includes ARIA roles to organize and improve the structure and navigation. The use of this value corresponds to the inclusion of Document Structure, Landmark, Live Region, and Window roles [WAI-ARIA].	ARIA	–
Indicates the resource is compatible with the Accessibility Toolkit (ATK) API [ATK] for GNOME.	ATK	–	532 0# $aResource is compatible with the Accessibility Toolkit (ATK) API for GNOME
Indicates the resource is compatible with the Assistive Technology Service Provider Interface (AT-SPI) API [AT-SPI] for GNOME.	AT-SPI	–	532 0# $a Indicates the resource is compatible with the Assistive Technology Service Provider Interface (AT-SPI) API for GNOME.
Indicates the resource is compatible with the BlackBerry Accessibility API. This value is now obsolete as BlackBerry devices phones and operating systems are no longer developed, sold, or maintained. Note: After 2016, the BlackBerry name was licensed for phones released using the Android platform. Compatibility with these devices must be indicated using the AndroidAccessibility value.	BlackberryAccessibility (obsolete)	–	532 0# $aResource is compatible with the Blackberry Accessibility API.
Indicates the resource is compatible with the iAccessible2 API [IAccessible2] for Windows.	iAccessible2	–	532 0# $aResource is compatible with the iAccessible2 API for Windows.
Authors should use the NSAccessibility value instead.	iOSAccessibility (deprecated)	–	532 0# $aResource is compatible with the iAccessible2 API for Apple iOS devices.
Indicates the resource is compatible with the Java Accessibility API [JAPI].	JavaAccessibility	–	532 0# $aResource is compatible with the Java Accessibility API (JAAPI).
Authors should use the UIAccessibility value instead.	MacOSXAccessibility (deprecated)	–	532 0# $aResource is compatible with the iAccessible2 API for Windows.
Indicates the resource is compatible with the Microsoft Active Accessibility (MSAA) API [MSAA] for Windows.	MSAA (Microsoft Active Accessibility)	–	532 0# $aResource is compatible with the Microsoft Active Accessibility (MSAA) API for Windows
Indicates the resource is compatible with the User Interface Automation API for Windows.	UIAutomation	–	532 0# $aCompatible with the User Interface Automation API for Windows.

accessibilityControl (Recommend - Removal)

Definition	Schema.org	ONIX	MARC21
Users can fully control the resource through keyboard input.	fullKeyboardControl	–	532 0#$a Users can fully control the resource through keyboard input.
Users can fully control the resource through mouse input.	fullMouseControl	–	532 0#$a Users can fully control the resource through mouse input.
Users can fully control the resource through switch input.	fullSwitchControl	–	532 0#$a Users can fully control the resource through switch input.
Users can fully control the resource through touch input.	fullTouchControl	–	532 0#$a Users can fully control the resource through touch input.
Users can fully control the resource through video input.	fullVideoControl	–	532 0#$a Users can fully control the resource through video input.
Users can fully control the resource through voice input.	fullVoiceControl	–	532 0#$a Users can fully control the resource through voice input.

accessMode

The human sensory perceptual system or cognitive faculty through which a person may process or perceive information.

Definition	Schema.org	ONIX	MARC21	UNIMARC
Indicates that the resource contains information encoded in auditory form. Note: This value is not set when the auditory content conveys no information. For example, an instructional video might include background music while all the necessary information to complete the task is conveyed visually and/or through text captions.	auditory	–	341 0#$aauditory; Also: 336 ##$aperformed music$2rdacontent; 336 ##$asounds$2rdacontent; 336 ##$aspoken word$2rdacontent; 344 ## $i sound
Indicates that the resource contains charts encoded in visual form.	chartOnVisual	List: 81; Code 19: Figures, Diagrams, Charts	341 0 $avisual; 532 8# $aResource contains charts encoded in visual form.	231 $i19$2onix81
Indicates that the resource contains chemical equations encoded in visual form.	chemOnVisual	–	341 0# $avisual; 532 8# $aResource contains chemical equations encoded in visual form.
Indicates that the resource contains information encoded such that color perception is necessary.	colorDependent	–	532 2# $aThe resource contains information encoded in such that color perception is necessary.
Indicates that the resource contains diagrams encoded in visual form.	diagramOnVisual	List: 81; Code 19: Figures, Diagrams, Charts	341 0# $avisual; 532 8# $a Resource contains diagrams encoded in visual form.	231 $i19$2onix81
Indicates that the resource contains mathematical notations encoded in visual form.	mathOnVisual	–	341 0# $avisual; 532 8# $aResource contains mathematical notations encoded in visual form.
Indicates that the resource contains musical notation encoded in visual form.	musicOnVisual	–	341 0# $avisual; 532 8# $a Resource contains music encoded in visual form.
Indicates that the resource contains information encoded in tactile form. Note that although an indication of a tactile mode often indicates the content is encoded using a braille system, this is not always the case. Tactile perception may also indicate, for example, the use of tactile graphics to convey information.	tactile	–	341 0#$atactile
Indicates that the resource contains text encoded in visual form.	textOnVisual	–	341 0# $avisual; 532 8# $a Resource contains text encoded in visual form.
Indicates that the resource contains information encoded in textual form. Note: This value is not set if the only textual content is for navigational purposes. For example, an audiobook might include a table of contents, but it is not necessary to read the table of contents to read the work. Likewise, books with synchronized text-audio playback may only include headings to allow structured navigation.	textual	List: 81; Code: 10 combined with List: 196; Code: 10 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. Note : on this point ONIX is unclear. Codes 16 and 14 or 15 should also be mobilisedList: 196; Code: 09 Inaccessible Known to lack significant features required for broad accessibility. Would give a better indication for "Screen reader friendly" (if code 09 is not found so the publication is textual). In both cases it's hard for a publisher to figure out how to describe "all content is accessible thru true text", he must adopt a reasoning by absence.	341 0# $atextual
Indicates that the resource contains information encoded in visual form. Note: This value is not set if the only visual imagery is presentational or not directly relevant to understanding the content. Examples of this type of imagery include cover images for publications, corporate logos, and purely decorative images.	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	341 0# $avisual; Also: 336 ##$astill image$2rdacontent 336 ##$atwo-dimensional moving image$2rdacontent 336 ##$athree-dimensional moving image$2rdacontent 336 ##$acartographic image$2rdacontent 336$acartographic three-dimensional form$2rdacontent 336$acartographic moving image$2rdacontent 336$anotated movement$2rdacontent 336$anotated music$2rdacontent 336$aperformed movement$2rdacontent	231 $i07$2onix81

accessModeSufficient

A list of single or combined accessModes that are sufficient to understand all the intellectual content of a resource.

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

Definition	Schema.org	ONIX	MARC21	UNIMARC
Indicates that auditory perception is necessary to consume the information.	auditory	List: 81; Code:01	341 0#$aauditory$2sapdv	181 #0 $cspw$2rdacontent (may correspond only to human narration)
Indicates that tactile perception is necessary to consume the information.	tactile	–	341 0#$atactile$2sapdv
Indicates that the resource contains information encoded in textual form. Note: This value is not set if the only textual content is for navigational purposes.	textual	List: 81; Code: 10 combined with List: 196; Code: 10 means all text is actual text. Note that List: 81; Code: 10 on its own (without List: 196; Code: 10) admits the possibility that the "text" is inaccessible because it is an image of text. Note : on this point ONIX is unclear. List: 196; Code: 09 Inaccessible Known to lack significant features required for broad accessibility. Would give a better indication for "Screen reader friendly" (if code 09 is not found so the publication is textual). In both cases it's hard for a publisher to figure out how to describe "all content is accesible thru true text", he must adopt a reasoning by absence.	341 0#$atextual$2sapdv
Indicates that visual perception is necessary to consume the information.	visual	–	341 0#$avisual$2sapdv

accessibilitySummary

A human-readable summary of specific accessibility features or deficiencies, consistent with the other accessibility metadata but expressing subtleties such as "short descriptions are present but long descriptions will be needed for non-visual users" or "short descriptions are present and no long descriptions are needed."

Definition	Schema.org	ONIX	MARC21	UNIMARC
The accessibilitySummary property is a free-form field that allows authors to describe the accessible properties of the resource. As a result, it does not have an associated vocabulary.	accessibilitySummary	List: 196; Code: 00: Accessibility Summary	532 8# $a [Text]	231 $i00$2onix196
Definition not found	Human-readable text	If present, include information from List: 196; Codes 95, 96, 98, and 99 (links for further information about accessibility)	Would not map

Information and references:

MARC21 ressources

From EPUB