We refer to these abstractions and techniques as the Port-Arbitrated Behavior , or PAB, paradigm.
BPMs run continuously and concurrently with other BPMs.
BPMs can be multiply-instantiated under different names. Connections Between Ports Ports in different BPMs are linked together by connections , unidirectional data paths between a source port and a destination port . A port can have any number of incoming and outgoing connections. Effects of the Six Connection Types on Message Propagation. The rectangles are BPMs, and the circles are ports.