| Title | Alt attribute for image in image map: URL instead of text alternative |
|---|---|
| Description | A document with a client-side image map; the image represents a traffic light. The img element has an alt attribute that duplicates the src attribute with the URI to the image instead of an appriopriate text alternative. |
| Creator | BenToWeb (Christophe.Strobbe@…) |
| Rights | Copyright BenToWeb 2005-2007 |
| Language | English |
| Date | 2005-08-26 |
| Status | accepted QA |
Technologies are markup languages or data formats. If the technology is a markup language, “features” refers to elements and attributes.
XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)
Feature: img
(namespace: http://www.w3.org/1999/xhtml)
.
Technical specification: How to specify alternate text .
Feature: map
(namespace: http://www.w3.org/1999/xhtml)
.
Technical specification: How to create client-side image maps .
Feature: area
(namespace: http://www.w3.org/1999/xhtml)
.
Technical specification:
Client-side image maps: the map and area elements
.
This test case is intended to fail because the alt attribute of the img element contains a URL,
so the text alternative does not serve the same purpose, nor does it present the same information as the image.
Automatic evaluation.
“Rules” refer to success criteria in WCAG 2.0, checkpoints in WCAG 1.0 and similar requirements.
The test case fails the following success criterion at line 15, column 7: http://www.w3.org/TR/2006/WD-WCAG20-20060427/guidelines.html#text-equiv-all.
The image has no proper text description associated with it (the URL of the image file).
The img element has a alt attribute containing (the URL of the image file).
(In Mozilla 1.7.3 and Firefox 1.0, the map does not work if the map element has only an id and no name attribute.)
This test case maps to failure F30: Failure of SC 1.1.1 due to using text alternatives that are not alternatives (e.g. filenames or placeholder text) (http://www.w3.org/TR/2006/WD-WCAG20-TECHS-20060427/Overview.html#F30).
The test case fails the following success criterion at line 15, column 7: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#text-equiv-informative.
The image has no proper text description associated with it (the URL of the image file).
The img element has a alt attribute containing (the URL of the image file).
(In Mozilla 1.7.3 and Firefox 1.0, the map does not work if the map element has only an id and no name attribute.)