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Applies to HTML 4.x and XHTML 1.x.
This failure relates to:
This describes a failure condition for text alternatives for images that
should be ignored by AT. If there is no alt attribute at all assistive
technologies are not able to ignore the non-text content. The alt attribute
must be proved and have a null value (i.e. alt="" or
alt=" ") to avoid a failure of this success criterion.
Note: Although alt=" " is valid, alt="" is
recommended.
Failure Example 1: Decorative images that have no alt
attribute
No resources available for this technique.
(none currently listed)
Identify any img and applet elements
that are used for purely decorative content;
Check that the alt attribute for these elements
exists.
Check that the alt attribute for these elements is
null.
if step #2 or step #3 is false, this failure condition applies and content fails the success criterion.