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A Discovery-Based Approach to Database Ontology Design

  • Silvana Castano
  • Valeria De Antonellis
Chapter

Abstract

In this paper, we introduce an approach to task-driven ontology design which is based on information discovery from database schemas. Techniques for semi-automatically discovering terms and relationships used in the information space, denoting concepts, their properties and links are proposed, which are applied in two stages. At the first stage, the focus is on the discovery of heterogeneity/ambiguity of data representations in different schemas. For this purpose, schema elements are compared according to defined comparison features and similarity coefficients are evaluated. This stage produces a set of candidates for unification into ontology concepts. At the second stage, decisions are made on which candidates to unify into concepts and on how to relate concepts by semantic links. Ontology concepts and links can be accessed according to different perspectives, so that the ontology can serve different purposes, such as, providing a search space for powerful mechanisms for concept location, setting a basis for query formulation and processing, and establishing a reference for recognizing terminological relationships between elements in different schemas.

Keywords

Ontology design Similarity techniques Schema analysis and clustering. Distributed and heterogeneous databases. 

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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • Silvana Castano
    • 1
  • Valeria De Antonellis
    • 2
  1. 1.Dipartimento di Scienze dell’InformazioneUniversity of MilanoMilanoItaly
  2. 2.Dipartimento di Elettronica per l’AutomazioneUniversity of BresciaBresciaItaly

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