Service(s)/Agent(s) Interaction Configuration Implementation

I am in the begining stage of implementing RosettaNet PIP2A1.
My area of interest before designing is to know the detailed information of Service Network Component and Agent Network Component for Business Transactions defined by RosettaNet PIP2A1 specification and how these Components are implemented using webMethods for
(1).Service-Service Interaction Config
(2).Service-Agent Interaction Config
(3).Agent-Agent Interaction Config
What steps need to be followed for creating FLOWS.

Your help in this issue will definetely be a great help.