To identify a message or package in the subject interchange, and to indicate that message's or package's acknowledgement or rejection (action taken), and to identify any error related to the unh, unt, uno, and unp segments
To identify a group in the subject interchange and to indicate acknowledgement or rejection (action taken) of the ung and une segments, and to identify any error related to these segments.
To identify a message or package in the subject interchange, and to indicate that message's or package's acknowledgement or rejection (action taken), and to identify any error related to the unh, unt, uno, and unp segments