. I have been reading the MVS Using The Subsystem Interface . I need some clarification on SubSystem Interface (SSI) Function Routines. These are the function Routines defined by the IEFSSVTI and IEFSSVT TYPE=REQUEST macros. . My understanding is for broadcast requests, the SSI checks every subsystem to determine if each subsystem is interested in the requested function. . If the SSI finds a subsystem that is interested in the requested broadcast function the SSI pass control to the respective function routine specified in the IEFSSVTI macros. The process is repeated for each subsystem interested in handling the requested function. . . Is my assessment correct ? . . What is not clear from "MVS Using The Subsystem Interface" is how to exactly determine if the requested function is to be handled by my subsystem. . . For Example: I have a member in IEFSSNxx SYS1/PARMLIB for My Subsystem Called ABC1 it also specifies an INIT Routine (ABCINIT) And a Commmand Prefix as a prameter. . My Subsystem Initialization Routine (ABCINIT) does issues a IEFSSVT REQUEST=CREATE to create the SSVT. The Respective IEFSSVTI macros specify a Function Code of 10 and a Program called ABC@CMDS. . My understanding is the SSI will invoke my Function Routine (ABC@CMDS) for Function Code 10. It is up to MY Routine (ABC@CMDS) to determine if it is interested in processing this request code 10. . Im trying to determine the recommended methods for determining this. . . I thought Of Defining a System Level Name Token Pair with in My SubSystem Initialization Routine (ABCINIT). The Name Token would have My SSID embeded in its name. . When My Function Routine (ABC@CMDS) receives control It Constructs the same Name Token as the Initialization Routine (ABCINIT) and use the SSID from the SSCVT pointed to by register 0 as the SSID embeded in the Name Token. My Function Routine Retrieves the Name Token- If Its found This Request should be processed by My Routine. . . Is this a possible method to determining if a Command is to be handled by My SubSystem ? . What Methods do others use ? . Thanks In advance Paul
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