Data descriptor FM headers

The input and output data descriptor FM headers are used to receive and send a data structure name and version ID or a field tab separator character.

Input data descriptor FM header
On input to IMS, this header can follow the ATTACH or SCHEDULER FM header and is used to receive a data structure name (if DPAGE selection is by DPAGE name) and version ID or the input field tab separator character.
Output data descriptor FM header
On output from IMS, the data descriptor FM header is used to send a data structure name and version ID or the output field tab separator character if OFTAB= parameter of the DIV or the DPAGE statement is specified.

Parent topic: Using MFS with ISC