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Querying the Web Reconsidered: Design Principles for Versatile Web Query Languages

Author

Listed:
  • François Bry

    (University of Munich, Germany)

  • Christoph Koch

    (Vienna University of Technology, Austria)

  • Tim Furche

    (University of Munich, Germany)

  • Sebastian Schaffert

    (University of Munich, Germany)

  • Liviu Badea

    (Nat. Institute for Research and Development in Informatics, Bucharest, Romania)

  • Sacha Berger

    (University of Munich, Germany)

Abstract

A decade of experience with research proposals as well as standardized query languages for the conventional Web and the recent emergence of query languages for the Semantic Web call for a reconsideration of design principles for Web and Semantic Web query languages. This chapter first argues that a new generation of versatile Web query languages is needed for solving the challenges posed by the changing Web: We call versatile those query languages able to cope with both Web and Semantic Web data expressed in any (Web or Semantic Web) markup language. This chapter further suggests that well-known referential transparency and novel answer-closedness are essential features of versatile query languages. Indeed, they allow queries to be considered like forms and answers like form-fillings in the spirit of the query-by-example paradigm. This chapter finally suggests that the decentralized and heterogeneous nature of the Web requires incomplete data specifications (or incomplete queries) and incomplete data selections (or incomplete answers); the form-like query can be specified without precise knowledge of the queried data, and answers can be restricted to contain only an excerpt of the queried data.

Suggested Citation

  • François Bry & Christoph Koch & Tim Furche & Sebastian Schaffert & Liviu Badea & Sacha Berger, 2005. "Querying the Web Reconsidered: Design Principles for Versatile Web Query Languages," International Journal on Semantic Web and Information Systems (IJSWIS), IGI Global, vol. 1(2), pages 1-21, April.
  • Handle: RePEc:igg:jswis0:v:1:y:2005:i:2:p:1-21
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