To indicate the start of a transaction set and to assign a control number
200
AK1
Functional Group Response Header
To start acknowledgment of a functional group
300
AK2
Transaction Set Response Header
To start acknowledgment of a single transaction set
400
IK3
Implementation Data Segment Note
To report implementation errors in a data segment and identify the location of the data segment
Describes an event context in terms of the application or implementation contexts in force at the time the event occurred and the position in the EDI stream at which that context was activated
600
IK4
Implementation Data Element Note
To report implementation errors in a data element or composite data structure and identify the location of the data element
Describes an event context in terms of the application or implementation contexts in force at the time the event occurred and the position in the EDI stream at which that context was activated
800
IK5
Implementation Transaction Set Response Trailer
To acknowledge acceptance or rejection and report implementation errors in a transaction set
900
AK9
Functional Group Response Trailer
To acknowledge acceptance or rejection of a functional group and report the number of included transaction sets from the original trailer, the accepted sets, and the received sets in this functional group
To indicate the end of the transaction set and provide the count of the transmitted segments (including the beginning (ST) and ending (SE) segments)