AccessibilityFeature

No description

enum AccessibilityFeature {
  ANNOTATION
  ARIA
  INDEX
  PRINT_PAGE_NUMBERS
  PAGE_BREAK_MARKERS
  READING_ORDER
  STRUCTURAL_NAVIGATION
  TABLE_OF_CONTENTS
  TAGGED_PDF
  ALTERNATIVE_TEXT
  AUDIO_DESCRIPTION
  CAPTIONS
  DESCRIBED_MATHS
  LONG_DESCRIPTION
  RUBY_ANNOTATIONS
  SIGN_LANGUAGE
  TRANSCRIPT
  DISPLAY_TRANSFORMABILITY
  SYNCHRONIZED_AUDIO_TEXT
  TIMINGS_CONTROL
  UNLOCKED
  CHEMML
  LATEX
  MATHML
  TTS_MARKUP
  HIGH_CONTRAST_AUDIO
  HIGH_CONTRAST_DISPLAY
  LARGE_PRINT
  BRAILLE
  TACTILE_GRAPHIC
  TACTILE_OBJECT
  BOOKMARKS
  NONE
}

Values

`AccessibilityFeature.ANNOTATION`

The work includes annotations from the author, instructor and/or others.

`AccessibilityFeature.ARIA`

Indicates the resource includes ARIA roles to organize and improve the structure and navigation.

`AccessibilityFeature.INDEX`

The work includes an index to the content.

`AccessibilityFeature.PRINT_PAGE_NUMBERS`

The work includes equivalent print page numbers. This setting is most commonly used with ebooks for which there is a print equivalent.

`AccessibilityFeature.PAGE_BREAK_MARKERS`

The work includes static page markers. This value is most commonly used with ebooks for which there is a statically paginated equivalent, such as a print edition, but it is not required that the page markers correspond to another work. The markers may exist solely to facilitate navigation in purely digital works.

`AccessibilityFeature.READING_ORDER`

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.

`AccessibilityFeature.STRUCTURAL_NAVIGATION`

The use of headings in the work fully and accurately reflects the document hierarchy, allowing navigation by assistive technologies.

`AccessibilityFeature.TABLE_OF_CONTENTS`

The work includes a table of contents that provides links to the major sections of the content.

`AccessibilityFeature.TAGGED_PDF`

The contents of the PDF have been tagged to permit access by assistive technologies.

`AccessibilityFeature.ALTERNATIVE_TEXT`

Alternative text is provided for visual content (e.g., via the HTML alt attribute).

`AccessibilityFeature.AUDIO_DESCRIPTION`

Audio descriptions are available (e.g., via an HTML track element with its kind attribute set to "descriptions").

`AccessibilityFeature.CAPTIONS`

Indicates that synchronized captions are available for audio and video content.

`AccessibilityFeature.DESCRIBED_MATHS`

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.

`AccessibilityFeature.LONG_DESCRIPTION`

Descriptions are provided for image-based visual content and/or complex structures such as tables, mathematics, diagrams, and charts.

`AccessibilityFeature.RUBY_ANNOTATIONS`

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.

`AccessibilityFeature.SIGN_LANGUAGE`

Sign language interpretation is available for audio and video content.

`AccessibilityFeature.TRANSCRIPT`

Indicates that a transcript of the audio content is available.

`AccessibilityFeature.DISPLAY_TRANSFORMABILITY`

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.

`AccessibilityFeature.SYNCHRONIZED_AUDIO_TEXT`

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.

`AccessibilityFeature.TIMINGS_CONTROL`

For content with timed interaction, this value indicates that the user can control the timing to meet their needs (e.g., pause and reset)

`AccessibilityFeature.UNLOCKED`

No digital rights management or other content restriction protocols have been applied to the resource.

`AccessibilityFeature.CHEMML`

Identifies that chemical information is encoded using the ChemML markup language.

`AccessibilityFeature.LATEX`

Identifies that mathematical equations and formulas are encoded in the LaTeX typesetting system.

`AccessibilityFeature.MATHML`

Identifies that mathematical equations and formulas are encoded in MathML.

`AccessibilityFeature.TTS_MARKUP`

One or more of SSML, Pronunciation-Lexicon, and CSS3-Speech properties has been used to enhance text-to-speech playback quality.

`AccessibilityFeature.HIGH_CONTRAST_AUDIO`

Audio content with speech in the foreground meets the contrast thresholds set out in WCAG Success Criteria 1.4.7.

`AccessibilityFeature.HIGH_CONTRAST_DISPLAY`

Content meets the visual contrast threshold set out in WCAG Success Criteria 1.4.6.

`AccessibilityFeature.LARGE_PRINT`

The content has been formatted to meet large print guidelines.

The property is not set if the font size can be increased. See displayTransformability.

`AccessibilityFeature.BRAILLE`

The content is in braille format, or alternatives are available in braille.

`AccessibilityFeature.TACTILE_GRAPHIC`

When used with creative works such as books, indicates that the resource includes tactile graphics.

When used to describe an image resource or physical object, indicates that the resource is a tactile graphic.

`AccessibilityFeature.TACTILE_OBJECT`

When used with creative works such as books, indicates that the resource includes models to generate tactile 3D objects.

When used to describe a physical object, indicates that the resource is a tactile 3D object.

`AccessibilityFeature.BOOKMARKS`

The work includes bookmarks to facilitate navigation to key points.

`AccessibilityFeature.NONE`

Indicates that the resource does not contain any accessibility features.

Member of

AccessibilityMetadata object ● AccessibilityMetadataChanges input ● AccessibilityMetadataInput input

Values​

Member of​

Values

Member of