Querying structured information sources on the Web

Sergio Mergen, Juliana Freire, Carlos A. Heuser

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)208-221
Number of pages14
JournalInternational Journal of Metadata, Semantics and Ontologies
Issue number3
StatePublished - Jul 2010


  • Dataspaces
  • Information integration
  • Query rewriting
  • Search engines

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences


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