The description 
                  body element contains the accessible description forms that readers can select from depending on their needs.
                  
               
The description 
                  body must minimally contain the primary description of the associated content in a child 
                  
                     longdesc
                      element.
                  
               
The description body may also optionally compliment the primary description with a briefer summary and a simplified language representation.
The 
                  body of the description can also be used to carry alternative images for readers unable to adequately interact with the source
                  image. The 
                  
                     tactile
                      element can be used to include a tactile image and accompanying 
                  tour, and the 
                  
                     simplifiedImage
                      element can be used to include images more accessible to various reader needs.