The following example shows the minimum number of keywords needed to allocate a permanent VSAM data set through JCL:

   //DDNAME   DD   DSNAME=DSVSAM,DISP=(NEW,CATLG)

Explanation of Keywords:

• DSNAME specifies the data set name.
• DISP specifies that a new data set is to be allocated in this step and that the system is to place an entry pointing to the data set in the system or user catalog.
• DATACLAS, STORCLAS, and MGMTCLAS are not required if your storage administrator has provided ACS routines that will select the SMS classes for you, and DATACLAS defines RECORG.