Companion

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

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

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

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

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

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

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

Textual descriptions of math equations are included, whether in the alt attribute for image-based equations,

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.

Indicates that ruby annotations JLreq are attached to every CJK ideographic character in the content. Ruby annotations are used as pronunciation guides for the logographic characters for languages like Chinese or Japanese. They make difficult CJK ideographic characters more accessible.

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

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

Indicates that the content can be laid out horizontally (e.g, using the horizontal-tb writing mode of css-writing-modes-3). This value should only be set when the language of the content allows both horizontal and vertical directions. Notable examples of such languages are Chinese, Japanese, and Korean.

The work includes an index to the content.

The content has been formatted to meet large print guidelines.

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

Identifies that the LaTeX typesetting system is used to encode chemical equations and formulas.

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

Identifies that mathematical equations and formulas are encoded in MathML.

Identifies that MathML is used to encode chemical equations and formulas.

Indicates that the resource does not contain any accessibility features.

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

The resource includes static page markers, such as those identified by the doc-pagebreak role (DPUB-ARIA-1.0).

The resource includes a means of navigating to static page break locations.

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

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).

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.

Sign language interpretation is available for audio and video content.

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

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.

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

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.

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.

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

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

Indicates that a transcript of the audio content is available.

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

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

Indicates that the content can be laid out vertically (e.g, using the vertical-rl of css-writing-modes-3). This value should only be set when the language of the content allows both horizontal and vertical directions.

Indicates that the content can be rendered with additional word segmentation.

Indicates that the content can be rendered without additional word segmentation.

Creates a list of Feature from its RWPM JSON representation.