Interface realization relationships in UML

In UML diagrams, an interface realization relationship is a specialized type of implementation relationship between a classifier and a provided interface. The interface realization relationship specifies that the realizing classifier must conform to the contract that the provided interface specifies.

Typically, interface realization relationships do not have names. If you name an interface realization, the name is displayed beside the connector in the diagram.

As the following figure illustrates, an interface realization relationship is displayed in the diagram editor as a dashed line with a hollow arrowhead. The interface realization points from the classifier to the provided interface.

A component classifier realizes an interface called Interface1.