What should an EPUB accessibilitySummary provide?

An accessibility summary in an EPUB should provide a human-readable summary of accessibility, which serves to inform users about how accessible the content is for individuals with disabilities. This summary is crucial for allowing users to quickly understand the accessibility features implemented within the document, providing insights such as the usability of navigation, the presence of alternative text for images, and whether the design accommodates various assistive technologies. A well-crafted accessibility summary enhances the usability of the content and ensures that users with disabilities can make informed decisions about engaging with the EPUB.

In contrast, a detailed technical description might overwhelm a user who is not seeking in-depth technical specifics, while a list of authors or financial information does not pertain to accessibility and would not provide value to users focusing on accessibility needs. Ensuring that the summary is clear and concise allows users to grasp essential information without unnecessary complexity.