Output message formats

MFS edits output segments created by an IMS application program into a device format suitable for the device or remote program for which the message is destined.

Normally, the output segments from the IMS program contain no device-related data. All information needed for output to a device or remote program is provided when the message format is defined to the MFS Language utility program. For a remote program with DPM, specific device-dependent information is provided by the remote program without interpretation by MFS.

An output message consists of all segments presented to IMS with an ISRT call between a GU call to the I/O PCB and either a PURG call, another GU call to the I/O PCB, or normal program termination.

MESSAGE
    SEGMENTs
        FIELDs