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The retention attributes of the operating system are derived from a combination of Retention Limit and Expiration attributes (if the Control-M/Tape/DFSMS interface is active) and JCL EXPDT/RETPD parameters. The DO OVERJCL statement can be used to indicate if the retention specified in Control-M/Tape rules should override operating system retention.
For more information about JCL EXPDT/RETPD parameters, see "Defining Management Class Attributes" in the IBM manual DFSMSdfp Storage Administration Reference.
If no DO OVERJCL statement is specified in a rule, the value specified for Control-M/Tape installation parameter OVERJCL determines whether operating system retention is overridden by retention specified in Control-M/Tape rules.
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