UML Class Diagram Notation

Example 1. Control Package Class Diagram

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The following table represents notations that are used on the UML Class Diagrams:

Diagram element	Graphical presentation	Description
Class		Class represents a set of objects that have the same structure, behavior, and relationships with objects of other classes.
Attribute		Attribute is a typed value that defines the properties and behavior of the object.
Operation		Operation is a function that can be applied to the objects of a given class.
Responsibility		Responsibility is a contract which the class must conform.
Interface		Interface is an abstract class that defines a set of operations that the object of the class associated with this interface provides to other objects.
Association		Association is a relationship that connect two classes.
Aggregation		Aggregation is an association with the relation between the whole and its parts, the relation when one class is a certain entity that includes the other entities as components.
N-ary Association		N-ary association represents two or more aggregations.
Composition		Composition is a strong variant of aggregation when parts cannot be separately of the whole.
Generalization		Generalization ia an association between the more general classifier and the more special classifier.
Inheritance		Inheritance is a relationship when a child object or class assumes all properties of his parent object or class.
Realization		Realization is a relationship between interfaces and classes or components that realize them.
Dependency		Dependency is a relationship when some changes of one element of the model can need the change of another dependent element.
<< >>		Allows to define the properties of the dependency relationship between classes or classes and packages.
{ }		Allows to indicate the additional properties of association.
Multiplicity		Multiplicity shows the quantity of instances of one class that are linked to one instance of the other class.
Package		Package groups the classes and other packages.
Note		Note is a textual explication.
Note connector		Note connector is a connection between the note and elements.

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