(1) In XRF, a data set that ensures XRF system integrity by allowing only one active CICS system to access a particular set of resources. It is used by the active and alternate CICS systems to monitor each other's status.
(2) A data set containing configurational, operational, and communication information. The z/OS storage management subsystem (SMS), DFSMSrmm, and DFSMShsm use control data sets. See also active control data set, backup control data set, communications data set, source control data set, migration control data set, offline control data set.