A complete conceptual schema must include all relevant general static and dynamic aspects of an information system. Event types describe a nonempty set of allowed changes in the population of entity or relationship types in the domain of the conceptual schema. The conceptual schemas of many real-world information systems that include the specification of event types are too large to be easily m...

Assessing the level and quality of collaboration between students working in project teams is a complex task. The main goal of our study was to develop and validate an online questionnaire for assessing the quality of distance teamwork collaboration in a project-based systems modeling course. The research goals included assessing the transactional distance (TD) perceptions among peer students w...

In this paper, we address the classification dependency used to illustrate that one concept is an instance-of another concept. In doing so, we present four important aspects of the classification dependency in the integration of implementation-neutral Karlstad Enterprise Modelling schemata. First and second, the classification dependency can be used not only to recognise and resolve power types...

This paper describes an approach to database inference analysis based on conceptual graphs. The database inference problem is briefly described. Previous approaches are summarized, followed by a presentation of our inference model, called AERIE. The notions of an inference target class and an inference method class are introduced with examples given. Conceptual graphs are introduced as our mean...

In this paper, we extend Simple Conceptual Graphs with Reiter’s default rules. The motivation for this extension came from the type of reasonings involved in an agronomy application, namely the simulation of food processing. Our contribution is many fold: first, the expressivity of this new language corresponds to our modeling purposes. Second, we provide an effective characterization of sound ...

Computational systems in the field of building technology are, at present, mainly employed as electronic catalogs for the retrieval of technological information (content providers). However, the massive amount of information associated with building design demands explicit knowledge about the way various information pieces relate one to another in order to be able to achieve an intelligent use ...

Data warehouse is a dedicated database used for querying and reporting. Queries in this environment show special characteristics such as multidimensionality and aggregation. Exploiting the nature of queries, in this paper we propose a query driven design framework. The proposed framework is general and allows a designer to generate a schema based on a set of queries. Keywords—Conceptual schema,...

A main feature of many logics used in computer science is a means to express quantification. Usually, syntactical devices like variables and quantifiers are used for this purpose. In contrast to that, in conceptual graphs, a single syntactical item, the generic marker ‘∗’ is used. Nonetheless, sometimes conceptual graphs with variables have to be considered. If the generic marker is replaced by...

For assessing conceptual data model quality it is useful to have quantitative and objective measurement instruments. The scarcity of such measurement instruments leaded us to define a set of measures for structural complexity, an internal quality attribute of conceptual data models, with the idea that it is related to the external quality of such models. In order to gather empirical evidence th...