Welcome and Introduction EOOLT'2007 The 1st International Workshop - - PDF document

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Welcome and Introduction EOOLT'2007 The 1st International Workshop on Equation-Based Object-Oriented Languages and Tools Peter Fritzson Franois Cellier Christoph Nytsch Geusen David Broman class x { public class x { int a; float

SLIDE 1

Welcome and Introduction

EOOLT'2007 – The 1st International Workshop on Equation-Based Object-Oriented Languages and Tools

Peter Fritzson

François Cellier Christoph Nytsch Geusen David Broman

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History History – – Models and Equations Models and Equations

Model knowledge is stored in books and human minds which computers cannot access “The change of motion is proportional to the motive force impressed “

– Newton

SLIDE 2

History History – – Equation Sign Equation Sign Object Orientation Object Orientation

Equations were used in the third millennium B.C.
Equality sign was introduced by Robert Recorde in 1557

Newton still wrote text (Principia, vol. 1, 1686)

“The change of motion is proportional to the motive force impressed ”

CSSL (1967) introduced a special form of “equation”: variable = expression v = INTEG(F)/m Simula67 (1967) introduced object orientation – Classes, Objects, Inheritance

Equation Equation-

Based Object

Based Object-

Oriented Languages

Oriented Languages Approximate Characteristics? Approximate Characteristics?

Systems of Equations
Object Orientation
Mostly declarative
Hierachical System Decomposition
Reuse, Dynamic systems
What is the key difference compared to other

programming languages?

Tentative answer: Acausality of equations?

SLIDE 3

Challenges Challenges – – Today and Tomorrow Today and Tomorrow

Engineering Complex Systems
Model-driven development/engineering
What is the special contribution of Equation-

Based Object-Oriented Languages and Tools?

What additional benefits can Acausal equations

give?

etc.?
Topic of this workshop, Discuss, Brainstorm

Thanks Thanks

To the Authors for the papers
To the Program Committe for reviews
To Organization Committee for the organization
To the overall ECOOP Workshop organization

committee, Michael Cebulla, et al

To Stefan Jähnichen for the invitation