| Feature | Description | Code for EPUB 3 |
|---|---|---|
| alternativeText | All important images include a text alternative description | <meta property="schema:accessibilityFeature">alternativeText</meta> |
| displayTransformability | Users can modify the display of textual content such as font family and size | <meta property="schema:accessibilityFeature">displayTransformability</meta> |
| index | The publication contains an index of the content, such as a topical index | <meta property="schema:accessibilityFeature">index</meta> |
| longDescription | All complex images include an extended description of their purpose. | <meta property="schema:accessibilityFeature">longDescription</meta> |
| none | The publication does not include any accessibility features. If this is true for your book, mentioning it in the metadata is a great thing to do! | <meta property="schema:accessibilityFeature">none</meta> |
| printPageNumbers | Static print page break locations are included in the text | <meta property="schema:accessibilityFeature">printPageNumbers</meta> |