You use the ACS routines to process the special calls that DFSMSrmm makes to the SMS subsystem for ACS processing. DFSMSrmm provides the DATACLAS variable if it is available in addition to the ACS read-only variables when requesting that either a management class or storage group is returned.

Related reading:

See z/OS DFSMSrmm Implementation and Customization Guide for additional information about DFSMSrmm calls to the SMS ACS routines.