CICS, IMS and JCL Resources

The resources that your CICS application uses need to be defined, so that you have a CICS environment in which you can run and debug your applications. The resource definitions are set up as part of the migration of your application from the mainframe. They are stored in a Resource Definition file called dfhdrdat.

JCL and IMS and applications also use CICS-style resource definitions, defined in the dfhdrdat file.

The resource definitions include: