An association between a service and how it is implemented. The cardinality of this association is many-to-many. A service ...

An association between a service and how it is implemented. The cardinality of this association is many-to-many. A service may be provided by more than one logical device, operating in conjunction.  And, any device may provide more than one service.  When multiple devices are associated with a single service, it is assumed that these elements operate in conjunction to provide the service.  If different implementations of a service exist, each of these implementations would result in individual instantiations of the service object.  These individual instantiations would then have associations to the unique implementations.