Data structure name

The data structure name is sent in a separate DD header unless you code OPTIONS=NODNM on the DIV statement. If you code OPTIONS=DNM or the default is used, the DD header is present in each transmission chain of an output message, or each transmission chain of a demand paged output message.

In addition to the data structure name parameter in the DD header, the version identification parameter is present in the only transmission chain of an output message or in the first transmission chain of paged output messages.

Version identification

You have an option of coding a 2-byte value on the DEV statement to be included in the DOF or DIF control block as the version ID. If this parameter is not coded, the version ID is generated by MFS using a hashing algorithm on the date and time. The value is also printed in the MFS Language utility output so that you can reference it in format definitions in remote programs.