Definition

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

Examples

Example 1 — EPUB 3
<meta property="schema:accessModeSufficient">textual,visual</meta>
<meta property="schema:accessModeSufficient">textual</meta>
Example 2 — EPUB 2
<meta name="schema:accessModeSufficient" content="textual,visual"/>
<meta name="schema:accessModeSufficient" content="textual"/>
Example 3 — HTML with RDFa
<meta property="accessModeSufficient" content="textual,visual"/>
<meta property="accessModeSufficient" content="textual"/>
Example 4 — HTML with microdata
<meta itemprop="accessModeSufficient" content="textual,visual"/>
<meta itemprop="accessModeSufficient" content="textual"/>

Values

The property takes one or more of the following values:

The meaning of these values is the same as their definitions for access modes, but sufficient access modes identify the different combinations of senses that can be used to sufficiently consume the content, not just the raw access modes of the content itself.

A publication with images and text, for example, will require both visual and textual modes to be consumed. If the images are also adequately described (alt text and extended descriptions, as appropriate) a single textual mode would also be sufficient, indicating someone who is blind can consume the content.

Note

Unless the metadata format used supports lists of lists (e.g., JSON-LD), use a separate property declaration for each list of sufficient access modes. Separate the values with commas.

Related Links