Sequence
Element
Name
Type
Requirement
Min
Max
Repeat
01
Number of Included Segments
Numeric (N0)
Mandatory
1
10
-
Total number of segments included in a transaction set including ST and SE
segments
02
Transaction Set Control Number
String (AN)
Mandatory
4
9
-
Identifying control number that must be unique within the transaction set
functional group assigned by the originator for a transaction set