ST02 (Transaction Set)

The ST02 control number is assigned by the sender and is stored in the Transaction Set header. It must be unique within the Functional Group.

eXchange ensures that the control number in ST02 is identical with the SE02 element in the Transaction Set trailer and is unique within a Functional Group (GS-GE). Once you have defined a value for ST02, eXchange always uses that same value for SE02.