Business rules manual
RGAA v4.0.0
Theme 9: Structure of information
Rule 9.2.1

Rule 9.2.1

Summary

Check for HTML5 pages, if the page contains:

  • one and only one <main> tag without hidden attribute.
  • at least one <header> tag, except <header> that is direct child of <article> and <section> tags.
  • at least one <footer> tag, except <footer> that is direct child of <article> and <section> tags.
  • at least one <nav> tag.

A manual check is necessary to control the use of the different tags (<main>, <nav>, <footer> and <header>) according to this rule.

Business description

Criterion

9.2

Test

9.2.1

Description

Dans chaque page web, la structure du document vérifie-t-elle ces conditions (hors cas particuliers) ?

Particular cases (criterion 9.2)

Lorsque le doctype déclaré dans la page n’est pas le doctype HTML5, ce critère est non applicable.

Technical notes (criterion 9.2)

La balise <main> peut être utilisée plusieurs fois dans le même document HTML. Néanmoins, il ne peut y avoir en permanence qu’une seule balise visible et lisible par les technologies d’assistances, les autres devant disposer d’un attribut hidden ou d’un style permettant de les masquer aux technologies d’assistances. A noter cependant que l’utilisation d’un style seul restera insuffisant pour assurer l’unicité d’une balise <main> visible en cas de désactivation des feuilles de styles.

Level

A

Technical description

Scope

Page

Decision level

Semi-Decidable

Algorithm

Selection

Set1

All the <nav> tags.

CSS selector :

nav

Set2

All the <main> tags without hidden attribute.

CSS selector :

main:not([hidden])

Set3

All the <header> tags, except <header> that is direct child of <article> and <section> tags.

CSS selector :

*:not(article):not(section) > header

Set4

All the <footer> tags, except <footer> that is direct child of <article> and <section> tags.

CSS selector :

*:not(article):not(section) > footer

Process

Tests

Test0

Test whether the page has a doctype that is not an HTML5 doctype:

  • If yes, raise a MessageA.
  • If no, launch Test1, Test2, Test3 and Test4.
Test1

Test emptiness of Set1.

  • If empty, raise a MessageB.
  • If not empty, raise a MessageC.
Test2

Test whether Set2 is not empty and contains only one element.

  • If empty, raise a MessageD.
  • If not empty but contains multiple element, raise a MessageE.
  • Else raise a MessageC.
Test3

Test emptiness of Set3.

  • If empty, raise a MessageF.
  • If not empty, raise a MessageC.
Test4

Test emptiness of Set4.

  • If empty, raise a MessageG.
  • If not empty, raise a MessageC.

Messages

MessageA : Not Applicable
  • status: Not Applicable
MessageB : <nav> tag is missing
  • code : NavElementMissing
  • status: Failed
  • present in source: no
MessageC : Check manually the elements of the scope
  • code: ManualCheckOnElements
  • status: Pre-qualified
  • parameter: snippet
  • present in source: yes
MessageD : <main> tag is missing
  • code : NavElementMissing
  • status: Failed
  • present in source: no
MessageE : multiple <main> tags
  • code : MainElementNotUnique
  • status: Failed
  • parameter: snippet
  • present in source: yes
MessageF : <header> tag is missing
  • code : HeaderElementMissing
  • status: Failed
  • present in source: no
MessageG : <footer> tag is missing
  • code : FooterElementMissing
  • status: Failed
  • present in source: no

Analysis

Not Applicable

  • The page has a doctype that is not an HTML5 doctype.

Failed

  • multiple <main> tags without hidden attribute are found
  • OR missing <main> tag
  • OR missing <header> tag
  • OR missing <footer> tag
  • OR missing <nav> tag

Pre-qualified

In all other cases

Files

Rule 9.1.3Rule 9.3.1