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This document provides an overview of various Unified Modeling Language (UML) diagrams, including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state machine diagrams. It describes the basic components and purposes of each diagram type.

2
Tutorial contents
 UML basic
1. Use case diagram
2. Class diagram
3. Activity diagram
4. Sequence diagram
5. StateMachine diagram
 Together 2006
 Homework

3
UML Diagram – What is UML?
The Unified Modeling Language (UML) is a standard language for
Specifying Visualizing Constructing Documenting
Business Modeling Communications

4
Different Views
Users Designers Analyzers

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Use case diagram
Online C2C shopping
• overview the usage requirements
• presentations project stakeholders
• "the meat" of the actual requirements
Actor
Actor:
An actor is a person, organization, or
external system that plays a role in
one or more interactions with your
system
Use case
Use case:
A use case describes a sequence of
actions that provide something of
measurable value to an actor and is
drawn as a horizontal ellipse
System
boundary
System boundary:
indicates the scope of your system.
Anything within the box represents
functionality that is in scope and
anything outside the box is not

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Class Diagram
Class diagrams show the classes of the
system, their interrelationships (including
inheritance, aggregation, and
association), and the operations and
attributes of the classes.
Name
Attributes
Operations
Relations
• Associations
• Aggregation
• Generalization

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Relationships between Class Diagrams
 Association -- a relationship between instances of the two
classes. There is an association between two classes if an
instance of one class must know about the other in order to
perform its work. In a diagram, an association is a link
connecting two classes.
 Aggregation -- an association in which one class belongs to a
collection. An aggregation has a diamond end pointing to the
part containing the whole.
 Generalization -- an inheritance link indicating one class is a
superclass of the other. A generalization has a triangle pointing
to the superclass.

8
Sequence Diagram
 A sequence diagram is
 An interaction diagram that
details how operations are
carried out.
 What messages are sent
and when.
 Sequence diagrams are
organized according to time
Object: Class
Lifeline
Operations
Message

9
Activities Diagram
Activity diagrams describe the
workflow behaviour of a system
Start
Fork
Branch
Merge
Joint
End

10
State Machine Diagram
A State Machine diagram
shows the possible states of
the object and the transitions
that cause a change in state.
?
What is different
between activities
and Statemachine
diagram

This document provides a tutorial on using the Unified Modeling Language (UML) and Together 2006 modeling software. It covers the basic elements of UML including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state machine diagrams. It then demonstrates how to model an online course registration system using UML diagrams in Together 2006. Homework and additional reading resources are also listed.

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UML (Unified Modeling Language) is a standard modeling language used to visualize, specify, construct and document software systems. It provides a set of graphical notation techniques to create abstract models of systems. The key UML diagram types include use case diagrams, class diagrams, sequence diagrams, collaboration diagrams, activity diagrams, and state machine diagrams. UML can be used across the entire software development lifecycle from initial design to implementation. It aims to increase understanding between customers, developers and other stakeholders.

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Selab1 slides

1. UML tutorial

2. 2 Tutorial contents  UML basic 1. Use case diagram 2. Class diagram 3. Activity diagram 4. Sequence diagram 5. StateMachine diagram  Together 2006  Homework

3. 3 UML Diagram – What is UML? The Unified Modeling Language (UML) is a standard language for Specifying Visualizing Constructing Documenting Business Modeling Communications

4. 4 Different Views Users Designers Analyzers

5. 5 Use case diagram Online C2C shopping • overview the usage requirements • presentations project stakeholders • "the meat" of the actual requirements Actor Actor: An actor is a person, organization, or external system that plays a role in one or more interactions with your system Use case Use case: A use case describes a sequence of actions that provide something of measurable value to an actor and is drawn as a horizontal ellipse System boundary System boundary: indicates the scope of your system. Anything within the box represents functionality that is in scope and anything outside the box is not

6. 6 Class Diagram Class diagrams show the classes of the system, their interrelationships (including inheritance, aggregation, and association), and the operations and attributes of the classes. Name Attributes Operations Relations • Associations • Aggregation • Generalization

7. 7 Relationships between Class Diagrams  Association -- a relationship between instances of the two classes. There is an association between two classes if an instance of one class must know about the other in order to perform its work. In a diagram, an association is a link connecting two classes.  Aggregation -- an association in which one class belongs to a collection. An aggregation has a diamond end pointing to the part containing the whole.  Generalization -- an inheritance link indicating one class is a superclass of the other. A generalization has a triangle pointing to the superclass.

8. 8 Sequence Diagram  A sequence diagram is  An interaction diagram that details how operations are carried out.  What messages are sent and when.  Sequence diagrams are organized according to time Object: Class Lifeline Operations Message

9. 9 Activities Diagram Activity diagrams describe the workflow behaviour of a system Start Fork Branch Merge Joint End

10. 10 State Machine Diagram A State Machine diagram shows the possible states of the object and the transitions that cause a change in state. ? What is different between activities and Statemachine diagram

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