Asqatasun v4 - Summary

Asqatasun v4 - AccessiWeb 2.2 - Rule 6.2.2

Summary

This test consists in checking whether the title of each image link is relevant.

Business description

Criterion : 6.2

Test : 6.2.2

Test description :

For each image link with a link title (title attribute), is the content of this attribute relevant?

Level : Bronze

Technical description

Scope : page

Decision level : semidecidable

Algorithm

Selection

Set1 : All the <a> tags with a href attribute, with children (a[href]:has(\*) )

Set2 : All the elements of Set1 without own text and with only one child of type img or object (img , object[type\^=image], object[data\^=data:image], object[data$=png], object[data$=jpeg], object[data$=jpg],object[data$=bmp], object[data$=gif]) (assuming the definition of an image link in AccessiWeb 2.2)

Set3 : All the elements of Set2 with a not empty text and a title attribute

Process

Test1

For each element of Set3, we check whether the title attribute is not empty

For each element returning false in Test1, raise a Message 1

Test2

For each element of Set3, we check whether the title attribute doesn't only contain non alphanumerical characters.

For each element returning false in Test2, raise a Message 2

Test3

For each element of Set3, we check whether the title attribute value doesn't belong to the text link blacklist.

For each element returning false in Test3, raise a Message 2

Test4

For each element of Set2, we check whether the title attribute is not striclty identical to the link text.

For each element returning false in Test4, raise a Message 3

Test5

For each element of Set3, we check whether the title attribute contains the link text and more.

For each element returning true in Test5, raise a Message 3

For each element returning false in Test5, raise a Message 4

Message 1:Empty title attribute of link

• code : EmptyLinkTitle
• status: Failed
• parameter : link text, title attribute, snippet
• present in source : yes

Message 2: Not Pertinent link Title Attribute

• code : NotPertinentLinkTitle
• status: Failed
• parameter : link text, title attribute, snippet
• present in source : yes

Message 3: Suspected Pertinent link Title Attribute

• code : SuspectedPertinentLinkTitle
• status: NMI
• parameter : link text, title attribute, snippet
• present in source : yes

Message 4: Suspected not Pertinent link Title Attribute

• code : SuspectedNotPertinentTitleAttribute
• status: NMI
• parameter : link text, title attribute, snippet
• present in source : yes

Used nomenclature

• LinkTextBlacklist

Analysis

Not Applicable

• The Set3 is empty

Failed

• Test1 returns false for at least one element (At least one element of the Set3 has an empty title attribute text content which is blacklisted)
• Test2 returns false for at least one element (At least one element of the Set3 has title attribute only composed of non alphanumerical characters)
• Test3 returns false for at least one element (At least one element of the Set3 has a title attribute which is blacklisted)

Pre-qualified

• In all other cases

Notes

1. We assume here that the textual alternative of the image corresponds to the link text.
2. A link title is regarded as not-pertinent in the following cases :
   • the link title is empty
   • the link only contains not alphanumerics characters

3. Due to the "Note 1" of the definition of a link title, a title attribute identical to the text link is seen as suspected passed.