The Rules

The quality reference list for digital book

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The Rules

Images have a useful and reasonable size and resolution.

Rule 025

The included objects are provided with an appropriate fallback alternative.

Rule 026

Each audio and video-content is accompanied by its text transcript.

Renewal no. 027

Videos are triggered by the user.

Rule 030

Sounds are triggered by the user.

Rule 031

Animations, sounds and blinks can be paused.

Rule 032

The international code is available for all phone numbers

Rule 034

Country is accurate for all mailing addresses

Rule 035

The source code of each portion indicates the main language of the content

036

The main language of the target page of a link is identifiable when it differs from that of the original page

Renewal no. 037

The label for each link describes its function or the nature of the content it points to.

Rule 040

Similar links have identical colors, forms and behaviors in all documents

041

The underscore is reserved for the links.

Rule 042

Links are visually different from the rest of the content.

Rule 043

The digital book does not apply the same style to links visited and not visited.

Rule 044

Internal and external links are different.

Rule 045

Links causing external software to be opened have an explicit libelledé.

Rule 046

The file format proposed for download is specified.

Rule 047

Naming the proposed files for download identifies the content and origin of the files

Rule 050

All internal links to the digital book are valid

Rule 051