Word-based Information Retrieval (IR) suffers from several drawbacks which the Semantic Web initiative aims at overcoming through the use of ontologies. The European project Noesis (www.noesis-eu.org) is currently developing a concept-based approach to IR with Cardio-Vascular diseases as an application domain. For this purpose, an ontology of CV diseases had to be built. We present the process of its construction and its possible usages.
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