Tests Per HTML Technique

W3C Editor's Draft 2005-08-11

This version:

http://www.w3.org/WAI/GL/WCAG20/tests/testtechimages.html

Latest version:

http://www.w3.org/WAI/GL/WCAG20/tests/testtechimages.html

Previous version:

No previous version.

Editor:

Chris Ridpath, ATRC, University Of Toronto

Copyright 2004, ATRC, University Of Toronto, All Rights Reserved. W3C liability, trademark, document use and software licensing rules apply.

Abstract

• All img elements have an alt attribute.
• Alt text for all img elements is the empty string ("") if the image is decorative.
• Alt text for all img elements is not placeholder text.
• For all img elements, content text does not refer to the image by color alone.
• Image Alt text is short.

Technique - Spacer images

• Alt text for all img elements is the empty string ("") if the image is decorative.

Technique - Misuse of alternative text

• Alt text for all img elements that are not used as source anchors conveys the same information as the image.

Technique - Short text alternatives for object elements (future)

There are no checks assigned for this technique.

Technique - Non-explicit text alternatives for object

There are no checks assigned for this technique.

Technique - Long descriptions of images

• A long description ( longdesc ) file is used for each img element that does not have Alt text and/or body text conveying the same information as the image.

Technique - Long description of objects

There are no checks assigned for this technique.

Technique - D links (deprecated)

• All img elements that have a longdesc attribute also have an associated 'd-link'.

Technique - Describe images without longdesc

There are no checks assigned for this technique.

Technique - ASCII art

There are no checks assigned for this technique.

Technique - Emoticons

There are no checks assigned for this technique.

Technique - Text in images

• Alt text for all img elements contains all text in the image unless the image text is decorative or appears elsewhere in the content.
• Alt text for all input elements with a type attribute value of "image" contains all non decorative text in the image.
• Alt text for all area elements contains all non decorative text in the image area.

Technique - Background images

There are no checks assigned for this technique.