Modeling Information Sources for Information Integration
نویسندگان
چکیده
The aim of this paper is to present an approach and automated tools for designing knowledge bases describing the contents of information sources in PICSEL knowledgebased mediators. We address two problems: the abstraction problem and the representation problem, when information sources are relational databases. In a first part, we present an architectural overview of the PICSEL mediator showing its main knowledge components. Then, we describe our approach and tools that we have implemented (1) to identify, by means of an abstraction process, the main relevant concepts, called semantic concepts, in an Entity Relationship model and (2) to help representing these concepts using CARIN, a logical language combining description logics and Datalog Rules, and using specific terms in the application domain model.
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