A DFM for z/OS® DataAgent can only be triggered from an SdU application or a DDM application that is written to call the DataAgent from a client workstation. IBM® provides sample DataAgent routines, DFMXAGNT, DFMQTSO, DFMXSORT, and DFMXTSO that you can execute. You can also use these routines as examples to help write your own DataAgent routines. Your SdU application or DDM application uses the DDMOpen function to trigger the DataAgent processing on z/OS and it uses the DDMClose function to terminate the DataAgent processing.