To indicate the start of a transaction set and to assign a control number
Element Summary:
Ref
Id
Element Name
Req
Type
Min/Max
Usage
ST01
143
Transaction Set Identifier Code Description: Code uniquely identifying a Transaction Set
All valid standard codes are used.
M
ID
3/3
Must use
ST02
329
Transaction Set Control Number Description: Identifying control number that must be unique within the transaction set functional group assigned by the originator for a transaction set