The history of Scandinavian contributions to modeling languages is interesting in many respects. The most interesting part of the history is that some of mechanisms were conceived very early, years before modeling became mainstream. It is well-known that object-orientation started with SIMULA in 1967, but it is less known that SIMULA formed the basis for a modeling language already in 1973, and...

Object oriented constraint programs (OOCPs) emerge as a leading evolution of constraint programming and artificial intelligence, first applied to a range of industrial applications called configuration problems. The rich variety of technical approaches to solving configuration problems (CLP(FD), CC(FD), DCSP, Terminological systems, constraint programs with set variables, . . . ) is a source of...

In object-oriented modeling an object reacts objectively to an invocation of one of its methods in the sense that it is given which description for the method is interpreted. Subjective behavior of an object means that is not objectively given which description is interpreted | the choice depends on other factors than the invocation such as the invoking object, the context of the objects, and t...

This paper describes a design methodology for an object oriented database, based on a semantic network. This approach is based on the assumption that Yemantic data models are more powerful and more easy to use than current proposed object oriented data models. They are especially more poweful in representing integrity constraints and various relationships, Object oriented data models are genera...

A domain expertise always comprises a set of concepts and the logical relationships between them. In rule-based programming, rules which describe logical relationships are the fundamental knowledge units, and concepts are embedded in the rules. Objectoriented programming takes the opposite way; objects or classes which are used to describe concepts are the essential knowledge units, and all ope...

The use of a rigorous development environment is needed when developing a complex system, such as real-time and critical systems. Preventing industry from embracing formal method techniques is the lack of industrial strength tools to support formalization and analysis. We are developing an approach and a tool environment for the development of complex systems that integrates a graphical object-...

Undergraduated students in computer science at the University of Brest are learning bases of digital circuits by developing their own functional and structural models. The approach is object oriented to aggregate diierent abstraction levels in one single structure. This paper presents how simple combinatorial and sequential circuit can be functionally modelized and how complex circuits can hier...

Recently, it has been pointed out that the majority of the requirements engineering methods do not take into account non-functional requirements (NFRs) [10][11]. Consequently, we have been experiencing serious problems during the development of software systems, such as cost and schedule overruns. In order to diminish this negligence of NFRs and its consequences, this work proposes a strategy (...

We present an extended ER model with entity, role, and association as the basic constructs for object-oriented modeling. The purpose of the constructs is to support object evolution and extension for long lived objects. A class hierarchy consists of a static part and a dynamic part. The static part is a classiication of entity classes, while the dynamic part is the role classes played by entiti...

In this paper, we propose a graphical data model for specifying spatio-temporal semantics of video data. The proposed model segments a video clip into subsegments consisting of objects. Each object is detected and recognized, and the relevant information of each object i s recorded. The motions of objects are modeled through their relative spatial relationships as t ime evolves. Based on the se...