Querying structured information sources on the Web

  • Authors:
  • Sergio Mergen;Juliana Freire;Carlos A. Heuser

  • Affiliations:
  • Instituto de Informatica, Universidade Federal do Rio Grande do SUL (UFRGS), Porto Alegre 91501-970, Brazil.;School of Computing, University of Utah, Salt Lake City 84112, USA.;Instituto de Informatica, Universidade Federal do Rio Grande do SUL (UFRGS), Porto Alegre 91501-970, Brazil

  • Venue:
  • International Journal of Metadata, Semantics and Ontologies
  • Year:
  • 2010

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Abstract

To provide access to heterogeneous data distributed over the Web, we propose a solution that merges the expressiveness of information integration systems with the flexibility found in dataspace-aware search engines. Our approach requires neither a mediated schema nor source mappings. In the absence of a mediated schema, the user formulates structured queries based on what she expects to find. We demonstrate the feasibility of this approach by providing a query interface for integrating hundreds of (real) structured Web information sources. We also discuss experimental results which indicate that our query rewriting algorithm is both effective and scalable.