Answer / guest

In the JCL, you must have DD stmts for the cluster and for
the path(s). In the COBOL Program, SELECT .. ASSIGN TO
ddname for base cluster RECORD KEY IS... ALTERNATE RECORD
KEY IS..

Answer / mani

For every alternate index we define the path.
First we define the base cluster then the alternate index
and then the path.while creating the path we specify the
base cluster and alternate index through which the base
cluster would be accessed.
In order to refer to the alternate index in the jcl we put
two dd statements one for the base cluster and another for
accessing the alternate index which is nothing but the path.

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On which datasets You can have ALT INDEX?

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