In the last decades, information modelling and knowledge bases have become essentially important subjects, not only in academic communities related to information systems and computer science, but also in the business area where information technology is applied. The 18th European-Japanese Conference on Information Modelling and Knowledge Bases (EJC 2008) continues the series of events that originally started as a cooperation initiative between Japan and Finland. Later, the geographical scope of these conferences expanded to cover the whole of Europe and other countries as well. The EJC conferences constitute a worldwide research forum for the exchange of scientific results and experiences achieved in computer science and other related disciplines using innovative methods and progressive approaches. In this way, a platform has been established drawing together researches as well as practitioners dealing with information modelling and knowledge bases. The main topics of EJC conferences target the variety of themes in the domain of information modelling, conceptual analysis, multimedia knowledge bases, design and specification of information systems, multimedia information modelling, multimedia systems, ontology, software engineering and knowledge and process management. The aim of this publication is also applying new progressive theories. To this end, much attention is paid also to theoretical disciplines including cognitive science, artificial intelligence, logic, linguistics and analytical philosophy.

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