Accessible Publishing Knowledge Base

Explanation

Code 13 indicates that the publication contains content which may affect photosensitive readers.

This code corresponds to WCAG 2 Success Criterion 2.3.1. It should be reported if any content flashes more than 3 times per second or the flash is below the general flash and red flash thresholds.

When publishers make a flashing hazard claim, they should provide details about where the hazard occurs in the accessibility addendum.

If there are no flashing hazards, use code 14. If the risk cannot be determined, use code 24.

Only for use in ONIX 3.0 or later.

Examples

<ProductFormFeature>
   <ProductFormFeatureType>12</ProductFormFeatureType>
   <ProductFormFeatureValue>13</ProductFormFeatureValue>
</ProductFormFeature>
<ProductFormFeature>
   <ProductFormFeatureType>09</ProductFormFeatureType>
   <ProductFormFeatureValue>92</ProductFormFeatureValue>
   <ProductFormFeatureDescription>
      The video in figure 2-1 contains strobe
      lighting effects at the 2:41 mark that
      may affect photosensitive users. The
      effect lasts for 10 seconds.
   </ProductFormFeatureDescription>
</ProductFormFeature>

Applies To

* Applies to the table of contents and any supplementary HTML resources.

Related Links

• ONIX — List 143: Code 13
• Schema.org — accessibilityHazard flashing