Description The S4 Service Functions view defines the behavior of a service in terms of the functions it is expected to perform. S4 is the key behavioral specification for services. Equivalent in nature to L4 - Logical Activities and R4 - Resource Functions, it specifies a set of functions that a service implementation is expected to perform. Implementation The S4 view can be represented using: - S4 Service Functions Taxonomy diagram based on the UML Clas diagram.

- S4 Service Functions diagram for the Operational Activity flows. This diagram is based on the UML Activity diagram.

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