In a printed book, structural parts like chapters are clearly identified visually through specific styling. For people using assistive technologies it is necessary to provide this information in computer form using the corresponding arguments that are the EPUB types and ARIA roles. It is also useful for future content updates.

Objectives

• Ensure users of assistive technologies can navigate and understand the structure of the book.
• Provide a clear identification of chapters and other portions of the book.

Implementation

• Use appropriate ARIA keys to identify different sections of the book, such as chapters
• Document the ARIA roles used and their implementation to facilitate maintenance and future updates.

Control

• Use screen readers like NVDA, JAWS, or VoiceOver to navigate the book and verify that sections are correctly identified.