Explanation

The none value is used when the publisher is sure that the content presents no known hazards for users.

This value can safely be set when there is no dynamic or multimedia content (i.e., the publication consists only of text and/or static images). Otherwise, the presence of sound, motion simulation, and sound hazards needs to be verified.

The none value should not be used with any other hazard value. It is the equivalent of setting noFlashingHazard, noMotionSimulationHazard, and noSoundHazard.

Examples

Example 1 — EPUB 3
<meta property="schema:accessibilityHazard">none</meta>
Example 2 — EPUB 2
<meta name="schema:accessibilityHazard" content="none"/>
Example 3 — Audiobooks
"accessibilityHazard": [
   "none"
]

ONIX Mapping

The none value maps to ONIX list 143 code 00 ("No known hazards or warnings").

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