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Specifies the high level qualifier for the IMS™ bootstrap data set. The qualifier '.BSDS' is appended to the specified qualifier to form the full name of the IMS bootstrap data set.

When IMS manages the ACBs (ACBMGMT=CATALOG), the specified IMS bootstrap data set is passed to the IMS catalog API.

This parameter is optional. If it is not specified on the HFM1POPI macro statement, ZDT/IMS uses either the value specified on the HFM1POPD macro statement (if specified on that statement), or IMS.DFSCD000 (otherwise).

The user cannot override the value you specify for this parameter.