input: [Name] mag [Offset] 10 [Size] 1 [Description] This is the magnitude level in the V-I colour. This value refers to one of 256 discrete steps in the magnitude range for the file [Type] 
output: unsigned char
options: i n t
options: u n s i g n e d c h a r
options: u n s i g n e d s h o r t i n t