Unified Modelling Language (UML) Software Engineering Lab. Sharif University of Technology

Why We Model ? ► A model is a simplification of reality. model ► We build models so that we can better understand the system we are developing ► Benefits:  Models help us to visualize a system as it is or as we want it to be.  Models permit us to specify the structure or behavior of a system. behavior  Models give us a template that guides us in constructing a system. template  Models document the decisions we have made.

Building Blocks of the UML Building Blocks of the UML ► The vocabulary of the UML encompasses three kinds of building blocks: ► The vocabulary of the UML encompasses three kinds of building blocks:  Things  Relationships  Diagrams

Things  Classes  Interfaces  Use Case  Component  Node  Packages  Notes

Relationships in the UML ► Dependency ► Association ► Generalization ► Realization

Diagrams in the UML  Class diagram  Object diagram  Use case diagram  Sequence diagram  Collaboration diagram  Statechart diagram  Activity diagram  Component diagram  Deployment diagram

Use case Diagram

Classes

Class Diagram

Modeling Simple Collaborations

Modeling a Logical Database Schema

Generalization Among Packages

Modeling Groups of Elements

Sequence Diagrams

Collaboration Diagrams

Activity Diagrams

State Machines

Components

Components and Interfaces

Nodes and Components