Why do you use a control card?

Answer Posted / guest

A control card can be a member of a pds or a sequential
dataset and is used for storing the date fields, Definitions
of VSAM files....etc. You use control card because you
cannot use a instream procedure in a procedure. Generally
you will be calling a Proc from your Jcl and you cannot code
instream procedure in the Proc and so you will point to the
dataset which is called control card.

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