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Ontology-based data access has received a lot of attention recently, yet there is no clear methodology to evaluate a " semantically enriched " information system in general or an ontology based data access system in particular. The quality of such an information system clearly depends on how well your data fits your class-level ontology, and how well these(More)
Information system designers face many challenges w.r.t. selecting appropriate semantic technologies and deciding on a modelling approach for their system. However, there is no clear methodology yet to evaluate " semantically enriched " information systems. In this paper we present a case study on different modelling approaches for annotating medical images(More)
Information systems should be designed to allow users to express their information requests in a simple way and to retrieve information that they consider as relevant to these requests. In order to fulfil these requirements, information system designers face many challenges w.r.t. selecting appropriate technologies and deciding on a modelling approach for(More)
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