This is root element of this document which contains name space definitions for the document elements. Description is not available. Contains the differential group that the differential belongs to. This field must be a valid value on the diff_group_head table. Contains the value of the differential that is included in the differential group. This field must be a valid value from the diff_ids table. This field contains the display sequence for the differential. This type can hold a string of max length of 10 characters. This type can hold a number of digits count 4.