longdesc:
Specifies a link to a long description of the frame or image. This description should supplement the description listed in the title attribute. If used with an imagemap, this attribute should provide information about the map's contents.
Used with Elements:
Content:
URI. A URI pointing to a long description.
Default:
Not required
Deprecated in XHTML 1.0:
No
DTD:
XHTML 1.0 Standard and XHTML 1.0 Frameset
