You can define retention and movement policies using a vital record specification data set name mask and a management class, or a vital record specification management value, can also be assigned to manage a data set.

If you want to use management class expiration attributes, you must enable this by specifying the OPTION MCATTR in EDGRMM parmlib, as described in Exploiting SMS management class attributes.

For each new tape data set, DFSMSrmm performs these tasks:

1. During pre-ACS processing for new tape data sets:
   1. DFSMSrmm calls the EDG_EXIT100 installation exit for a vital record specification management value. The vital record specification management value provides management policy and retention policy information for data sets.
   2. DFSMSrmm returns the selected value in the MSPOLICY read-only variable.
2. During OPEN processing:
   1. DFSMSrmm calls ACS routines and passes environment information. Your ACS routine can set a management class name.
   2. If ACS processing does not return a management class name, DFSMSrmm calls the EDG_EXIT100 installation exit to obtain a vital record specification management value.
   3. At OPEN time, DFSMSrmm records the specified management class or vital record specification management value at the data set level.