RGAA 3.0 - Rule 8.8.2

Summary

This test consists in checking whether each change of language is valid

Business description

Criterion

8.8

Test

8.8.2

Description

On each Web page, is each change in human language identification (lang and/or xml:lang attribute) relevant?

Level

AA

Technical description

Scope

Page

Decision level

Decidable

Algorithm

Set1

All the tags different from <html> that have a "lang" or a "xml:lang" attribute

Process

Test1

We extract the language code from the "lang" or the "xml:lang" attributes from elements of Set2. If these attributes are both set and different, we keep the "xml:lang" attribute if the doctype of the page is found within the "XhtmlDoctypeDeclarations" whitelist, and we keep the "lang" attribute instead.

For each extracted text, we detect the language and compare with the declaration of the lang attribute.

If the detected language and the declared language are different, if the size of the extracted text is superior to 20 words, raise a messageA. Raise a MessageB instead.

If the detected language and the declared language are identical, but the size of the extracted text is inferior to 20 words, raise a messageC.

MessageA : Irrelevant Language Declaration
  • code : IrrelevantLanguageDeclaration
  • status: Failed
  • parameter : extracted lang, declared lang, extracted text, snippet
  • present in source : yes
MessageB : Suspected Irrelevant Language Declaration
  • code : SuspectedIrrelevantLanguageDeclaration
  • status: Pre-Qualified
  • parameter : extracted lang, declared lang, extracted text, snippet
  • present in source : yes
MessageC : Suspected relevant Language Declaration
  • code : SuspectedRelevantLanguageDeclaration
  • status: Pre-Qualified
  • parameter : extracted lang, declared lang, extracted text, snippet
  • present in source : yes

Analysis

Not Applicable

The page has no tag different from <html> with the "lang" or "xml:lang" attribute (Set1 is empty)

Passed

All the lang declarations are identical to the detected lang and all the tested text size are superior to 20 words

Failed

At least one lang declaration is different from the detected lang, with a text size superior to 20 words

Pre-Qualified

In all other cases

TestCases

TestCases files for rule 8.8.2