Explanation

A mathOnVisual access mode indicates that a publication contains images of mathematical equations and formulas. It is expressed in metadata using the mathOnVisual value.

As mathOnVisual describes a characteristic of visual content, it is considered a modifier of the visual access mode value and you should always pair the two values together.

It is not uncommon to pair mathOnVisual with colorDependent if color perception is the only way to differentiate information (e.g., if relationships are color coded).

It is sometimes also paired with textOnVisual if text content beyond the equation or formula data itself is also encoded in the image (e.g., if relationships or descriptions are drawn as text in the image canvas).

Note that math represented using a text-based markup language like MathML, or a formatting language like LaTeX, is considered a textual access mode.

A mathOnVisual access mode is common in publications produced using the EPUB format but is less common for audiobooks. It is only potentially relevant when an audiobook also contains supplementary material beyond the audio.

Examples

Example 1 — EPUB 3
<meta property="schema:accessMode">visual</meta>
<meta property="schema:accessMode">mathOnVisual</meta>
Example 2 — EPUB 2
<meta name="schema:accessMode" content="visual"/>
<meta name="schema:accessMode" content="mathOnVisual"/>
Example 3 — Audiobooks
"accessMode": ["auditory", "visual", "mathOnVisual"]

ONIX Mapping

The mathOnVisual value maps to list 81 code 48 ("Mathematical content").

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