This paper presents an experiment analyzing the behavior of modelers in interpreting conceptual model fragments developed using an OntologyDriven Conceptual Modeling Language (OntoUML). Our goal is to evaluate the effect of two ontological constructs (relator and role) in modeling relationships. Our hypotheses are: (i) the use of these constructs for modeling relations increases the clarity of ...

In this paper we present EVORM, a data modelling technique for evolving application domains. EVORM is the result of applying a general theory for the evolution of application domains to the object role modelling technique PSM, a generalisation of ER, EER, FORM and NIAM. First the general theory is presented. This theory describes a general approach to the evolution of application domains, abstr...

We present a modeling language for the model-driven development of secure, distributed systems based on the Unified Modeling Language (UML). Our approach is based on role-based access control with additional support for specifying authorization constraints. We show how UML can be used to specify information related to access control in the overall design of an application and how this informati...

Addiction to online role-playing games is one of the most discussed aspects of recent cyberpsychology, mainly for its potentially negative impact on the social lives of young people. In our study, we focus on some aspects of youth and adolescent addiction to MMORPGs. We investigated connections between players and their game characters and examined if, and in what ways, player relationship to t...

1 Introduction In this paper we take a multi-party interaction point of view on our research on multimodal interaction between agents in various virtual environments: an educational environment, a meeting environment, and a storytelling environment. These environments are quite different. All these environments require the modeling of multimodal interaction: interactions between human users, th...

Object-Role modellers miss the advantages of automated reasoning over their ORM conceptual models, which could be addressed by DL reasoners. DLs are not considered user-friendly and could benefit from the easy to use ORM diagrammatic and verbalization interfaces and modelling methodologies. Relating the two would greatly expand the scope for automated reasoning with additional scenarios to impr...

1 Nee Campbell. 2 The work reported in this paper has been funded in part by the Cooperative Research Centres Program through the Department of the Prime Minister and Cabinet of the Commonwealth Government of Australia. Abstract: XML is increasingly becoming the preferred method of encoding structured data for exchange over the Internet. XML-Schema, which is an emerging text-based schema defini...

Conceptual data modelling techniques aim at the representation of data at a high level of abstraction. This implies that conceptual data modelling techniques should not only be capable of naturally representing complex structures, but also the rules (constraints) that must hold for these structures. Contemporary data modelling techniques however, do not provide a language, which on the one hand...

Question/object: XML Schema, since its elevation to W3C Recommendation on the 2nd May 2001, is fast becoming the preferred means of describing structured XML data. However, until recently, there has been no effective means of graphically designing XML Schemas without exposing designers to low-level implementation issues. Bird, Goodchild and Halpin (2000) proposed a method to address this shortf...