This is a draft document supplied by the WCAG Techniques Task Force. It in no way represents a WCAG Working Group consensus or agreement and is provided for informational and discussion purposes only. The accessibility test listed below should not be construed as required for conformance with the proposed WCAG2.
img elements have an alt attribute.Copyright 2005, ATRC, University Of Toronto, All Rights Reserved. W3C liability, trademark, document use and software licensing rules apply.
This test case was created by the ATRC at the University Of Toronto. It should not be construed as required for conformance with the proposed WCAG2.
The complete list of tests may be found at http://www.w3.org/WAI/GL/WCAG20/tests/
Comments on this test may be made to the WCAG mailing list.
As part of the conformance test process, this test has a status of 'accepted'.
Guideline: 1.1 - Provide text alternatives for all non-text content.
Success Criteria:
1. For all non-text content that is used to convey information, text alternatives identify the non-text content and convey the same information. For multimedia , provide a text-alternative that identifies the multimedia. Refer to guideline 1.2 for requirements for synchronized alternatives for multimedia. How to provide text alternatives for content that conveys information . (Informative)
Level 1
The WCAG2 has 3 priority levels for making Web content accessible. This test has a priority of 'Level 1'.
The WCAG Working Group has created techniques that describe how Web content may be made accessible. The following techniques are related to this test:
There are no prerequisite tests for this test.
img element for the presence of an alt attribute.img elements have an alt attribute.alt attribute to each img element.The following tests are related to this test and may be performed next. There is no requirement that these tests be performed:
img elements is not placeholder text.
img elements used as source anchors is not empty when there is no other text in the anchor.
img elements contains all text in the image unless the image text is decorative or appears elsewhere in the content.
img elements is the empty string ("") if the image is decorative.
These test files contain examples of the accessibility problem detectable by this test. They may also contain more accessibility problems than the one described in this test. Please ignore any extraneous accessibility problems in these files.
img element without an alt attribute.)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=UTF-8" />
<title>Testfile - Check #1 - Positive</title>
</head>
<body>
<p><img src="rex.jpg"/></p>
</body>
</html>
img element with an alt attribute.)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=UTF-8" />
<title>Testfile - Check #1 - Negative</title>
</head>
<body>
<p><img src="rex.jpg" alt="A black and brown cat named Rex."/></p>
</body>
</html>