In CICS® IA V3.2 you could group transactions, programs, or both to from a notional "application". In CICS IA V5.1 you can still use these applications definitions and the utilities shipped to provide this are available.
It is now recommended that you use the new function introduced in CICS TS V5.1, to define applications as part of the platform capabilities. You can now logically define the various resources that make up a business application in CICS TS as a single entity and deploy these resources to CICS TS as a single resource. An application that is defined in this way can be managed as a single entity throughout its lifecycle, making CICS TS application management faster, simpler, and less error prone. For more information, see Platforms.
You can use your CICS IA V3.2 Application definitions in your CICS IA V5.1 environment by reloading the XML files you created in CICS IA V3.2: v32hlq.SCIUDAT2.OUT(CIUAPPLS). To do this review and run the sample job in hlq.SCIUSAMP.DB2(CIUALOAD). You must use the CICS IA V3.2 data set as input to CIUMIGXT DD statement in the second step.