A "longdesc" attribute is required for any image where additional information not in the "alt" attribute is required

Description

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">

Quail Class Name

imgHasLongDesc
Severity: 
1
WCAG 1.0: 
Section 1.1
WCAG 2.0: 
Section 1.1.1
OAC Number: 
8