Sub-Processes

BPMN shape	BPMN description
	A Sub-Process is a process that is included within another process. Subprocesses may not be modelled as BPMN SubProcesses, but rather a call activity is used in this case. The call activity must have the stereotype <<BPMNExecutableSubProcess>>.

UML representation	UML description
	In contrast to executable processes, the sub-processes (call activities) are not mapped to a persistent state class of their own, but to a sub-state engine.