Architecting and designing : UML 2.5 : Relationships : Port Provides (Realizes) Interface
  
Port Provides (Realizes) Interface
Ports represent interaction points through which a Classifier communicates with its environment.
The Interfaces associated with a Port specify the nature of the interactions that may occur over it. The provided Interfaces of a Port characterize requests to the Classifier that its environment may make through this Port. The owning Classifier must offer the Features owned by the provided Interfaces.
The Port Provides (Realizes) Interface is drawn from a Port to an Interface. In the example below, the relationship is drawn from the Port on Wheel, to the Interface definition, Transmission.
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The full example, combined with the Required Interface side, is:
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See also
Association
Dependency
Realization
Collaboration Property to Part
Component Provides (Realizes) Interface
Component Requires (Uses) Interface
Port Requires (Uses) Interface
Comment to AnnotatedElement
Constraint to ConstrainedElement
Connector
ElementGroup to Element
Instance Specification Relationships
Generalization
Package Containment
Package Import
Substitution
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