Sc1 1 1 Longdesc

Created by: Frank Berker

Description

This test checks the sufficient provision of a long text description for non-text content using the longdesc attribute. This test doesn’t check the accessibility of a page referenced to from the longdesc attribute and this page must be checked separately.

Background

• G73: Providing a long description in another location with a link to it that is immediately adjacent to the non-text content
• G74: Providing a long description in text near the non-text content, with a reference to the location of the long description in the short description
• G92: Providing long description for non-text content that serves the same purpose and presents the same information
• H45: Using longdesc
• F67: Failure of Success Criterion 1.1.1 and 1.2.1 due to providing long descriptions for non-text content that does not serve the same purpose or does not present the same information
• The proper provision of a short text alternative is checked in [[SC1-1-1-text-alternative]]

Assumptions

• The test assumes that a page referenced within the longdesc attribute is accessible.

Test properties

Test procedure

Selector

Test mode: automatic

//img[@longdesc]

Step 1

Test mode: automatic

Check if the longdesc attribute value is a valid URL

if yes, continue with [step 2][#step-2]

else, return

Step 2

Test mode: automatic

Check if the resource referenced in the longdesc attribute value exists

if yes, continue with [step 3][#step-3]

else, return

Step 3

Test mode: automatic

Concatenate the results of Text Alternative Computation Algorithm run on the element and assign it to variable T1.

User Input Question:

if yes, return

else, return