Output message descriptor bytes (SLU P)
The bits of the message descriptor 1 (byte 2) have the following meaning when set on.
- Bit 0
- This message is an IMS system message or a broadcast message.
- Bit 1
- This message is formatted by MFS.
- Bit 2
- Reserved.
- Bit 3
- This message is a nonqueued message (no specific destination). Bit 0 is also set.
- Bit 4
- Reserved.
- Bit 5
- Fast Path-recoverable output.
- Bit 6
- A MID name is present in the MFS data field.
- Bit 7
- A forms name is present in the MFS data field.
The bits of message descriptor 2 (byte 3), when
set on, have the following meaning:
- Bit 0
- This output is formatted by MFS DPM. The version ID might or might
not be present, and one of the following is present in the MFS data
field:
- DPM format name
- Logical page name (DPAGE statement label)
- Presentation name (PPAGE statement label)
- Bit 1
- Reserved.
- Bit 2
- At the end of this chain, the component indicated in byte 4 of the output function management header is protected.
- Bits 3-7
- Reserved.
If message descriptor 2, bit 2, is set on, IMS does not send another output
chain until an appropriate input occurs. This input can be an input
message, an MFS control request, or a READY-TO-RECEIVE (RTR)
command.