Navigation occurs in a predictable order.

There are several options for navigating a digital book: for example from page to page by pressing a button or to a specific location on the screen; from one paragraph to another using the tab key on the keyboard; from one chapter to another via the table of contents of the application or the book itself... To ensure reading comfort, we must do what is necessary to make all these means of access possible.

Objectives

• Facilitate navigation, whatever the terminal or means of access
• Improve the accessibility of content for people with disabilities

Implementation

• Order contents logically
• Provide a table of contents for machine use
• If possible, provide a table of contents for direct human use

Control

• Control the logical order of the document, in particular via keyboard navigation
• Check the presence of a table of contents in the reading device

Validation

• Needs to be human verified.