In this example, two entry-sequenced clusters are defined. The attributes of the second cluster defined are modeled from the first cluster.

//DEFCLU7  JOB    ...
//STEP1   EXEC   PGM=IDCAMS
//SYSPRINT DD     SYSOUT=A
//SYSIN    DD     *
    DEFINE CLUSTER -
           (NAME(GENERIC.A.BAKER) -
           VOLUMES(VSER02) -
           RECORDS(100 100) -
           RECORDSIZE(80 80) -
           NONINDEXED ) -
         CATALOG(USERCAT4)
    DEFINE CLUSTER -
           (NAME(GENERIC.B.BAKER) -
           MODEL(GENERIC.A.BAKER USERCAT4)) -
         CATALOG(USERCAT4)
/*

The first DEFINE CLUSTER command defines an entry-sequenced cluster, GENERIC.A.BAKER. Its parameters are:

• NAME specifies the name of the entry-sequenced cluster, GENERIC.A.BAKER.
• VOLUMES specifies that the cluster is to reside on volume VSER02.
• RECORDS specifies that the cluster's space allocation is 100 records. When the cluster is extended, it is extended in increments of 100 records.
• RECORDSIZE specifies that the cluster's records are fixed length (the average record size equals the maximum record size) and 80 bytes long.
• NONINDEXED specifies that the cluster is entry-sequenced.
• CATALOG specifies that the cluster is to be defined in the USERCAT4 catalog.

The second DEFINE CLUSTER command uses the attributes and specifications of the previously defined cluster, GENERIC.A.BAKER, as a model for the cluster still to be defined, GENERIC.B.BAKER. A list of the parameters follows:

• NAME specifies the name of the entry-sequenced cluster, GENERIC.B.BAKER.
• MODEL identifies GENERIC.A.BAKER, cataloged in user catalog USERCAT4, as the cluster to use as a model for GENERIC.B.BAKER. The attributes and specifications of GENERIC.A.BAKER that are not otherwise specified with the DEFINE command's parameters are used to define the attributes and specifications of GENERIC.B.BAKER.
• CATALOG specifies that the cluster is to be defined in the USERCAT4 catalog.