UML is a language for visualizing, specifying, constructing, and documenting the artifacts of software systems, as well as for business modeling.
UML Diagrams
There is a wide variety of UML diagrams. You can choose the one that best suits your needs. The most common ones are:
Class Diagram
A class diagram is a static view of a system. It shows the classes of the system, their attributes, operations (or methods), and the relationships between objects.
Example of a class diagram
Sequence Diagram
A sequence diagram shows interactions between objects in a system. It shows which messages are sent to which objects and in what order.
Example of a sequence diagram
Package Diagram
A package diagram shows the packages of a system and the relationships between them.
Example of a package diagram
Use Case Diagram
Identify main & secondary actors;
Define functions actors will use;
Actors can be real persons or other systems;
For a system, there are as many use case diagrams as package programs.
Example of a use case diagram
On the left: main actors. On the right: secondary actors;
Activity Diagram
An activity diagram shows the flow of control in a system. It shows the activities of a system and the control flow between them.
Example of a activity diagram
State Machine Diagram
A state machine diagram shows the states of an object and the transitions between those states.
