Task: Class Definition Understanding (ontology: Business_Finance/BPMN)

Which of the following definitions best describes 'Message Flow'?

A. A the concept is used to show the flow of
             messages between two participants that are
             prepared to send and receive them. In BPMN, two
             separate Pools in the Diagram will represent the two
             participants (e.g., business entities or business
             roles).
B. A the concept represents a Participant in a Process. It is
                      also acts as a "swimlane" and a graphical container
                      for partitioning a set of activities from other Pools,
                      usually in the context of B2B situations.
C. A the concept is a sub-partition within a Pool and will extend 
	the entire length of the Pool, either vertically or horizontally. Lanes 
	are used to organize and categorize activities.
D. the concept, which is used in the definition
	of attributes for all graphical elements.

Answer: A the concept is used to show the flow of
             messages between two participants that are
             prepared to send and receive them. In BPMN, two
             separate Pools in the Diagram will represent the two
             participants (e.g., business entities or business
             roles).