General format of output function management headers (Finance)
IMS appends a header to the first or only-in-chain transmission of all messages sent, except the IMS null message and VTAM® commands and indicators.
This header describes the type of message that follows and, if appropriate, indicates the output component that is to receive the message. The header can contain optional MFS information.
The length of the output function management header varies
from 3 to 29 bytes. The format is:
- Byte 0
- Header length including length byte (binary)
- Byte 1
- Message description (binary)
- Byte 2
- Output component identification (binary)
- Bytes 3-28
- MFS data (length byte: binary; names: EBCDIC)