14. Additional rules for compliance
Some guidelines found in accessibility reference documents were not included in this manual as they are considered as rarely applicable.
It is however necessary to respect these additional rules to ensure compliance with RGAA 4.1.2 and WCAG 2.1.
They are listed below:
- Make sure the information is understandable, even without color
- Ensure content readability even when text spacing properties are customized
- Incorporate the summary of each complex data table in the
<caption>tag - Provide alternative text for each informative
<canvas>,<embed>and<object>tag - Provide alternative text for each
<canvas>,<embed>and<object>tag used as a link or button - Hide each decorative or ambient
<canvas>,<embed>and<object>tag from assistive technologies - Do not initiate an action while the trigger is in the “pressed” state
- Anticipate the interface behavior
- Group related options in
<select>boxes with<optgroup> - Add the
titleattribute to describe each<frame> - Use the
dirattribute to indicate a change in reading direction - Ensure proper use of content masking techniques
- Do not use tags or attributes specific to data tables in layout tables
- Ensure that the HTML flow is consistent from one page to the next
- Indicate in the alternative text for visual CAPTCHA where to find the non-visual version
- In complex tables, use the
headersandidattributes to associate header cells with their corresponding data cells - Make sure layout tables follow the right reading order
- Plan alternative text for each type of multimedia content (
<video>,<audio>,<object>,<embed>, etc.) - Populate the
altattribute of each mapped image and its<area />tags - Tag block quotations using
<blockquote> - Tag inline quotations using
<q> - Write the HTML code in a logical reading order