What do you mean by "Realization"?

Answer Posted / supraja

UML modeling, a realization relationship is a relationship
between two model elements, in which one model element (the
client) realizes the behavior that the other model element
(the supplier) specifies. Several clients can realize the
behavior of a single supplier. You can use realization
relationships in class diagrams and component diagrams.

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

As the following figure illustrates, a realization is
displayed in the diagram editor as a dashed line with an
unfilled arrowhead that points from the client (realizes
the behavior) to the supplier (specifies the behavior).



You can model the following situations using realization
relationships:
A component is realized by a set of classifiers that
provide its implementation.
A collaboration instance contains the objects and messages
that are needed to implement the behaviors that a use case
specifies.

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