1. Perspectives on the Unified Modeling Language semantics
10th SDL Forum
Copenhagen, June 2001
Trygve Reenskaug, Mogul Norway, Oslo
Perspectives on UML semantics

2. Three Disciplines of Computing
Complex Algorithms
Complex Data
Comples Processes
Perspectives on UML semantics

3. Object Management Group A World of Interacting Objects
"…drive the industry towards interoperable, portable software components based on standard object-oriented interfaces."
Complex Algorithms
Complex Data
Comples Processes
Perspectives on UML semantics

4. First OMG Achievement CORBA
Common Object Request Broker
Architecture
Complex Algorithms
Complex Data
Comples Processes
IDL : interfaces & operations
XML : encoding information
Perspectives on UML semantics

5. Second OMG Achievement Unified Modeling Language
The UML Specification defines a graphical language for visualizing, specifying, constructing, and documenting the artifacts of distributed object systems.
Complex Algorithms
Complex Data
Comples Processes
Perspectives on UML semantics

6. A system is a chosen view on reality
A system is a part of the real world which we choose to regard as a whole,
separated from the rest of the world during some period of consideration.
A whole that we choose to consider as a collection of components,
each component being characterized by attributes and by actions which may involve itself and other components.
Holbæk_Hanssen et.al.: System Description and the Delta Language
Oslo, 1977
Perspectives on UML semantics

7. Open Systems For a given system,
the environment is the set of all components outside the system
that affect the system
or that are affected by the system.
Etzioni: Modern Organizations
Prentice-Hall, 1964
Perspectives on UML semantics

8. An Open system
Perspectives on UML semantics

9. Another Open system
Perspectives on UML semantics

10. Perspectives on System Components
Classification: Group on common characteristics
Artifact: Group on common purpose.
People categorize objects in terms of they roles the play within intuitive theories about how the world operates.
Artifacts can't be defined by their shape or their constitution, only by what they can do and by what someone, somewhere, wants them to do.
Perspectives on UML semantics

11. Use Case Model of Open System
Understand IT
Monday, November 12, 2018
Use Case Model of Open System
ActivityNetworkDemo
UseCase 1: Generate test networks
Actor
UseCase 2: Frontload
UseCase 3: Allocate resource
Perspectives on UML semantics
©2000 Trygve Reenskaug

12. Model Systems & Components with Collaborations & Roles
Understand IT
Monday, November 12, 2018
Model Systems & Components with Collaborations & Roles
System: collection of Components Collaboration: collection of Roles
UML ClassifierRole
ActivityNetworkDemo
/ Tool
Actor
Model Behavior:
Use Cases
Interactions
Sequence Diagrams
State Machines
Activity Graphs
/ Planning
Service
Perspectives on UML semantics
©2000 Trygve Reenskaug

13. Composition / Decomposition UML Subsystem: Behavioural grouping
Understand IT
Monday, November 12, 2018
Composition / Decomposition UML Subsystem: Behavioural grouping
Component = Sub-System Role = Sub-Collaboration
UML Subsystem
ActivityNetworkDemo
/ Tool
Actor
Model Behavior:
Use Cases
Interactions
Sequence Diagrams
State Machines
Activity Graphs
/ Planning
Service
Perspectives on UML semantics
©2000 Trygve Reenskaug

14. Deployment UML Component: Deployable Subsystem
Understand IT
Monday, November 12, 2018
Deployment UML Component: Deployable Subsystem
Component = Sub-System Role = Sub-Collaboration
UML Component
ActivityNetworkDemo
/ Tool
Actor
Model Behavior:
Use Cases
Interactions
Sequence Diagrams
State Machines
Activity Graphs
/ Planning
Service
Perspectives on UML semantics
©2000 Trygve Reenskaug

15. Finally: Two Perspectives on UML Models
Class Perspective: Classes, Inheritance, Packages, Deployment
Role Perspective Collaborations, Roles, Containment, Behavior
Perspectives on UML semantics

16. Thank You http://ifi.uio.no/~trygver More info at
Perspectives on UML semantics