The content and meaning of each page is not altered when styles are disabled.

Styles allow you to give a shape to the background. Content must remain readable and understandable when this form cannot be seen or displayed.

Objectives

• Enable the understanding of content by readers whose reader software will not apply the style sheets embedded in the digital book or whose access mode is not visual.
• Improve the accessibility of content to people with disabilities.

Implementation

• Care will be taken to maintain the consistency of the content in the HTML files (i.e. the structuring tags: h1, h2, p, and semantic tags: em, strong…), to present them in the same order and with the same meaning with or without updating. in CSS form.

Control

• Use ACE to check the logical structure of the content (Structures tab of the ACE report).
• Check that the contents remain readable, for example in the case of a transparent HTML image whose readability will depend on the background color -ground applied with the background-color property

Validation

• Needs to be human verified.