Business rules manual
RGAA v4.0.0
Theme 9: Structure of information
Rule 9.1.2

Rule 9.1.2

Summary

This test consists in checking whether each heading of the page is relevant.

Business description

Criterion

9.1

Test

9.1.2

Description

Dans chaque page web, le contenu de chaque titre (balise <hx> ou balise possédant un attribut WAI-ARIA role="heading" associé à un attribut WAI-ARIA aria-level) est-il pertinent ?

Technical notes (criterion 9.1)

WAI-ARIA permet de définir des titres via le rôle heading et l’attribut aria-level (indication du niveau de titre). Bien qu’il soit préférable d’utiliser l’élément de titre natif en HTML <hx>, l’utilisation du rôle WAI-ARIA heading est compatible avec l’accessibilité.

Bien que la spécification HTML5 autorise l’utilisation exclusive de titres de niveau 1 (h1), le manque de support des technologies d’assistance oblige à utiliser une hiérarchie de titres pertinente.

Level

A

Technical description

Scope

Page

Decision level

Semi-Decidable

Algorithm

Selection

Set1

All the <Hx> tags where x is comprise between 1 and 6 and all the tags with a role attribute equals to heading and an aria-level attribute.

CSS selector:

h1, h2, h3, h4, h5, h6,
[role=heading][aria-level]

Process

Test1

For each element of Set1, we check whether the content of the tag is pertinent (see Notes about relevancy detection).

For each element returning false in Test1, raise a MessageA. Raise a MessageB instead.

MessageA : Not pertinent heading
  • code: NotPertinentHeading
  • status: Failed
  • parameter: tag text, tag name, snippet
  • present in source: yes
MessageB : Check heading pertinence
  • code: CheckHeadingPertinence
  • status: Pre-Qualified
  • parameter: tag text, tag name, snippet
  • present in source: yes

Analysis

Not Applicable

  • The page has no <Hx> tag
  • The page has no tag with heading semantic (role=“heading” and aria-level=“Integer”)

(Set1 is empty)

Failed

At least one element of Set1 has an empty content or a content only composed of non alphanumerical characters (Test1 returns false for at least one element)

Pre-Qualified

In all other cases

Notes

Definition of not-pertinent legend :

A heading is seen as not-pertinent in the following cases :

  • the content of the tag is empty
  • the content of the tag only contains non alphanumerics characters

Files

Rule 9.1.1Rule 9.1.3