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Select-Project Queries over XML Documents

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Next Generation Information Technologies and Systems (NGITS 2002)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 2382))

Abstract

This paper discusses evaluation of select-project (SP) queries over an XML document. A SP query consists of two parts: (1) a conjunction of conditions on values of labels (called the selection) and (2) a series of labels whose values should be outputed (called the projection). Query evaluation involves finding tuples of nodes that have the labels mentioned in the query and are related to one another other in a meaningful fashion. Several different semantics for query evaluation are given in this paper. Some of these semantics also take into account the possible presence of incomplete information. The complexity of query evaluation is analyzed and evaluation algorithms are described.

Supported by Grant 96/01-1 from the Israel Science Foundation

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Author information

Authors and Affiliations

  1. Dept. of Computer Science, The Hebrew University, Jerusalem, 91904, Israel

    Sara Cohen, Yaron Kanza & Yehoshua Sagiv

Authors
  1. Sara Cohen
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  2. Yaron Kanza
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  3. Yehoshua Sagiv
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Editor information

Editors and Affiliations

  1. Department of Computer Science and Engineering, University of Washington, Sieg Hall, Room 310, Mailstop 352350, Seattle, WA, 98195, USA

    Alon Halevy

  2. William Davidson Faculty of Industrial Engineering and Management, Technion — Israel Institute of Technology, Technion City, 3200, Haifa, Israel

    Avigdor Gal

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© 2002 Springer-Verlag Berlin Heidelberg

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Cohen, S., Kanza, Y., Sagiv, Y. (2002). Select-Project Queries over XML Documents. In: Halevy, A., Gal, A. (eds) Next Generation Information Technologies and Systems. NGITS 2002. Lecture Notes in Computer Science, vol 2382. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45431-4_2

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  • DOI: https://doi.org/10.1007/3-540-45431-4_2

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-43819-9

  • Online ISBN: 978-3-540-45431-1

  • eBook Packages: Springer Book Archive

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