This will allow the user to define a band, usually done through the AED display program. The format definition of a band is printed.

band -name : band-comments : (x1,y1),(x2y2), etc.
band-name - The name of the band. Terminated by a : symbol.
band-comments - The band features the ability to include a short comment into the band definition. It usually holds some information pertaining to what parameters the points list will created with.
x1, y1, etc. - This is the x,y co—ordinate of the bands points list. It can have symbols ( ) [], between the points to make them easier for the human eye to read.

Bands serve no purpose in themselves, but they allow the user to specify a series of points when defining a constraint and make the job of having constraints with common boundaries easier to construct.