What are the symbols and notations used in class diagram?

What are the symbols and notations used in class diagram?

Basic Class Diagram Symbols and Notations

• Active Classes. Active classes initiate and control the flow of activity, while passive classes store data and serve other classes.
• Visibility.
• Associations.
• Multiplicity (Cardinality)
• Constraint.
• Composition and Aggregation.
• Generalization.

How many notations does UML have?

1 Answer. Best explanation: The different notations of UML includes the nine UML diagrams namely class, object, sequence, collaboration, activity, state-chart, component, deployment and use case diagrams.

What is the notation for a class?

The notation for a class is a rectangle with sections for the name of the class, attributes and operations, as shown in Fig. 2. Relationships among class diagram are association, generalization and various kinds of dependency, including realization and usage, as shown in Table 2.

How do you represent collaboration notation notation in a UML diagram?

Notations of a Collaboration Diagram

1. Objects: The representation of an object is done by an object symbol with its name and class underlined, separated by a colon.
2. Actors: In the collaboration diagram, the actor plays the main role as it invokes the interaction.

What is diamond symbol in class diagram?

It signifies aggregation. From wikipedia: In UML, it is graphically represented as a hollow diamond shape on the containing class end of the tree with a single line that connects the contained class to the containing class.

What is UML in SDM?

Unified Modeling Language — A system that allows a software designer to graphically layout and model a software application. It gives designers a way to literally draw a map of how a piece of software will be constructed and function.

How interface is represent in class diagram?

Class rectangle symbol that contains the keyword «interface». This notation is also called the internal or class view. Use the class shape when you need to model the details of the interface. Compartments in the class shape display information about the attributes, operations, and signal receptions of the interface.

What is diamond in UML?

In UML, it is graphically represented as a hollow diamond shape on the containing class with a single line that connects it to the contained class. The aggregate is semantically an extended object that is treated as a unit in many operations, although physically it is made of several lesser objects.