A “longdesc” attribute is required for any image where additional information not in the “alt” attribute is required¶
Severity code: Severe error
Any image that has an “alt” attribute that does not fully convey the meaning of the image must have a “longdesc” attribute.
Example¶
Wrong¶
<img src="complexImage.png" alt="A complex image that cannot be described succinctly.">
Right¶
<img src="complexImage.png" alt="A complex image that cannot be described succinctly." longdesc="longer_description.html">