Sign language interpretation is available for audio and video content.


Example 1 — EPUB 3
<meta property="schema:accessibilityFeature">
Example 2 — EPUB 2
<meta name="schema:accessibilityFeature"
Example 3 — Audiobooks
"accessibilityFeature": ["signLanguage"]


The signLanguage value is used to indicate that sign language interpretation is included for any auditory content.

Although captions and audio descriptions serve a similar purpose, many readers who are deaf prefer sign language interpretation as it is their primary means of communication so quicker and easier to follow.


HTML does not offer a simple mechanism for synchronizing sign language interpretation with a video. If interpretation is not part of the video stream, authors will have to provide a separate video overlay or play interpretation side-by-side with the video.

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