Use case diagram connection rules

	Actor	System	Collaboration	Use case
Actor	Association, Dependency, Realization, Generalization	Dependency, Realization	Dependency, Realization	Association, Dependency, Realization
System	Dependency, Realization	Dependency, Realization	Dependency, Realization	Dependency, Realization
Collaboration	Dependency, Realization	Dependency,	Dependency, Realization, Generalization	Association, Dependency, Realization
Use case	Dependency, Realization	Dependency, Realization	Association, Dependency, Realization	Association, Dependency, Include, Extend, Realization, Generalization

Connection rules in use case diagram

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