| Title | Alternative text for areas in client-side image maps: img element with image map; empty alt attributes in image map areas |
|---|---|
| Description | A document with image map: the alt attribute of the img element identifies the image and conveys the same information, but the alt attributes of the image map's area elements are empty. |
| Creator | BenToWeb (Christophe.Strobbe@…) |
| Rights | Copyright BenToWeb 2004-2007 |
| Language | English |
| Date | 2005-08-29 |
| Status | draft |
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 image map areas have no text alternatives. Based on the description above the image and the image's text alernative, a screen reader user might deduce that the three areas are for the three colours (mentioned in the alt text) of the traffic sign, but a screen reader does not necessarily read the colours from top to bottom if the source code order of the image map areas is not the same as the order of the colours.
End user.
“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-WCAG20-20050630/#text-equiv-informative.
The test case fails the following success criterion at line 18, column 46: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#text-equiv-informative.
The test case fails the following success criterion at line 19, column 47: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#text-equiv-informative.
The test case fails the following success criterion at line 20, column 47: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#text-equiv-informative.
The image has a text description but none of the areas in the image map has a text description.
The img element has an alt attribute.
However, since each of the area elements in the map element has an ampty alt attribute, this case does not pass.
This test case is identical to xhtml1_wcag2_20050630_1.1_l1_sc1_008, except that the alt attributes of the area elements are now empty.
(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.)