No-migration management class attributes

For data sets that have value as long as they are used but lose value quickly if they are not used, the no-migration (NOMIGMC) management class has been defined. Data sets that use this management class receive the following processing:

The data sets never migrate.
The data sets expire if they are not used in 20 days.
Unused allocated space is released from physical sequential, partitioned, and extended format VSAM data sets.

These are the attributes for NOMIGMC:

 NAME ===> NOMIGMC
               EXPIRE AFTER DAYS NON-USAGE ===> 20
               EXPIRE AFTER DATE/DAYS      ===> NOLIMIT
               PARTIAL RELEASE             ===> Y
               PRIMARY DAYS NON-USAGE      ===> 
               LEVEL 1 DAYS NON-USAGE      ===> NOLIMIT
               COMMAND OR AUTO MIGRATE     ===> NONE

The EXPIRE AFTER DAYS NON-USAGE attribute has been set to 20 days and the EXPIRE AFTER DATE/DAYS attribute has been set to NOLIMIT. The data sets will expire after 20 days of nonusage. If both attributes are set to NOLIMIT, the data sets will never expire.