1. A short introduction to UML Eivind J. Nordby Karlstad University
UML introduction
A short introduction to UML
Eivind J. Nordby
Karlstad University

2. Design Problem Complex systems cannot be understood without modelling
Modelling makes design reproductable
Modelling is documentation
=> Generic Language for this Problem Unified Modeling Language (UML)
Standard of the OMG
Current Version 1.4 (since Sep. 2001)
Inventors: Jacobson, Rumbaugh, Booch.
Goal: Giving developer a general language for communication
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3. UML Static Modelling Dynamic Modelling UML is a graphical language
Unified Modeling Language
UML provides a notation to describe software-intensive systems in an object-oriented way
Is general enough to describe nonsoftware systems
Static Modelling
Class Modelling
Component Modelling
Deployment Modelling
Dynamic Modelling
Activity/Sequence Modelling
Use Case Modelling
State Modelling
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4. An example A booking system for room reservation
The initiator tell who shall take part in the meeting
The system calls the participants by
The participants reply confirm by
When all have confirmed, the system sends an to the initiator
Support personnel are also notified
Cleaning, catering, secretaries, caretaker
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5. Classes and objects Static description
Part 1
Classes and objects
Static description

6. Basic class description
A class is drawn as a box with compartments for
class name
attributes
operations
Any but the first can be empty or suppressed
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7. Inheritance Inheritance
A connection with an open triangle in the direction to the base class
Abstract classes and operations
Italic class name
Italic operation name
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8. Associations Analysis diagram Multiplicities 0..1, 1, *, 1..*
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9. Associations Association label a verb describing the interaction
Interpretation of multiplicity
Referencial integrity
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10. Object diagram and links
Class diagrams show the general structure with
Object diagrams show snapshots
objects are underlined
An association is a potential for a link
links are instances of associations
Links do never have multilplicities
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11. Role names Role label a noun describing the role in the interaction
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12. Aggregations Aggregation a crew is composed of crew members
expresses whole - parts
Composition
a person owns a PID number
expresses exclusive ownership and dependency
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13. Navigability Analysis expresses relationships
Design diagram also expresses navigability
Part of the implementation design of “who keeps track of who”
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14. Interactions Dynamic description
Part 2
Interactions
Dynamic description

15. Interactions
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16. Interactions
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17. Interactions Sequence diagram Time based Life line
Call, operation, return
Activation record
Recursive calls
New and delete
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18. Interactions, new and delete
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