•Each service is conceived as atomic, simple, or composite process
•
•Associated with each service is a set
of inputs,
outputs, preconditions and effects
•
•Composite processes are compositions
of simple or other composite processes in terms of constructs such as sequence, if-then-else,
fork,...
•
•Data flow and Control flow should be
described for each composite service
•
•A black box and glass box view may be given of each composite service
•
•Process model (and process execution
model) used for:
•(automated) Web service invocation, composition, interoperation, monitoring