Variable-substitution exit (on JCL or job definition variable)

When you define a JCL or a job definition variable, you can specify the name of an exit that is called when substitution of the variable is required. If you are submitting a job contained in the job library, the exit is called at either job setup or job submission, but it is not called for promptable setup-variables.

You can use the exit to supply the value of a variable. For more information on JCL variables, see Managing the Workload.

The sample library SEQQSAMP that was created during installation contains the EQQJVXIT exit, which is a sample of variable-substitution exits. For information about this sample, see JCL-variable-substitution exit.