DFP invokes RACF® during data set allocation to determine the owner of the data set.

If the data set is not protected by a profile, RACF returns the high-level qualifier of the data set name as the default value for the owner of the data set.

If there is a data set profile, RACF checks it to determine whether the DFP segment contains a value for the RESOWNER field. If the RESOWNER field contains a value (user ID or group name), RACF returns this value to DFP as the owner of the data set. If the RESOWNER field does not contain a value, RACF uses the high-level qualifier of the data set name as the default value for the owner of the data set. In either situation, the value that RACF returns can be used as an input variable to ACS routines.