AccessibilityFeature

No description

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

Values

`AccessibilityFeature.ALTERNATIVE_TEXT`

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

`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.AUDIO_DESCRIPTION`

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

`AccessibilityFeature.BOOKMARKS`

The work includes bookmarks to facilitate navigation to key points.

`AccessibilityFeature.BRAILLE`

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

`AccessibilityFeature.CAPTIONS`

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

`AccessibilityFeature.CHEMML`

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

`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.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.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.INDEX`

The work includes an index to the content.

`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.LATEX`

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

`AccessibilityFeature.LONG_DESCRIPTION`

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

`AccessibilityFeature.MATHML`

Identifies that mathematical equations and formulas are encoded in MathML.

`AccessibilityFeature.NONE`

Indicates that the resource does not contain any accessibility features.

`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.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.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.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.STRUCTURAL_NAVIGATION`

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

`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.TABLE_OF_CONTENTS`

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

`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.TAGGED_PDF`

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

`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.TRANSCRIPT`

Indicates that a transcript of the audio content is available.

`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.UNLOCKED`

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

Member of

AccessibilityMetadata object ● AccessibilityMetadataChanges input ● AccessibilityMetadataInput input

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Member of​

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Member of