In professional environments which are characterized by a domain (Medicine, Law, etc.), information retrieval systems must be able to process precise queries, mostly because of the use of a specific domain terminology, but also because the retrieved information is meant to be part of the professional task (a diagnosis, writing a law text, etc.). In this paper we address the problem of solving domain-specific precise queries. We present an information retrieval model based on description logics to represent external knowledge resources and provide expressive document indexing and querying.
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