6. The method of claim 3 , further including accessing a definition of a call activity to enable calling the subprocess from the parent process, wherein a reference to the call activity includes the one or more arguments set with the one or more variables.
6. The method of claim 3 , further including accessing a definition of a call activity to enable calling the subprocess from the parent process, wherein a reference to the call activity includes the one or more arguments set with the one or more variables. 7. The method of claim 6 , further including accessing one or more attributes provided via a reference to a call activity to characterize one or more parameters received as the one or more variables via the one or more arguments.