Sequence flow from and to subprocesses
When a token reaches a subprocess object, all objects that do not have any incoming sequence flows are triggered. A token with the process number of the superior token is forwarded via these Start objects. Simulation of the subprocesses is terminated when all tokens with the same process number have left the subprocesses. When the last token leaves the subprocess, the outgoing sequence flow of the subprocess is activated. This means that one token with the process number of this token is forwarded to the next object via the sequence flow.