Top Tips for Creating Accessible EPUB 3 files
Below please find a simplified DIAGRAM Center to-do list:
- Make alt text available in a logical reading order.
- Separate content and presentation.
- Use more than just visual cues to convey information. Meaning should be the same without styles or formatting.
- Provide complete navigation: include a table of contents.
- Create meaningful structure: use the most specific tag possible.
- Define the content of each tag: use the EPUB 3 Structural Semantics Vocabulary.
- Use image descriptions and alt text: every image should have a description, caption or alt text unless it is solely decorative.
- Include page numbers of print equivalents.
- Provide the ISBN of the printed edition.
- Define the language(s) in both the root element and for words or passages that are not in the default language.
- Provide alternative access such as captions, transcripts, and sign language to media content.
- Enable native video and audio controls. Offer fallback alternatives.
- Make interactive content accessible. If using custom controls, follow the W3C Accessible Rich Internet Application (ARIA) specification.
- Provide accessibility metadata in your files. Let end users know what features are there. Search engines can then discover your accessible materials.
For the expanded list of tips, please go to the DIAGRAM Center website.