An interface is a kind of classifier that represents a declaration of a set of coherent public features and obligations. In UML, the interface can be represented as a class with keyword "interface" preceding the name. When modeling of the realization of interface, it is optionally presented as a ball, while the usage dependency form the interface can be presented as a socket. In this video we will show you how to model the ball and socket presentation of interface in Visual Paradigm’s Class Diagram.
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