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Adding Valid Time to XPath

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Databases in Networked Information Systems (DNIS 2002)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 2544))

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Abstract

In this paper we extend the XPath data model and query language to include valid time. XPath is a language for specifying locations within an XML document. We extend XPath’s data model by adding to each node a list of disjoint intervals or instants that represents the valid time. The valid time for a node is constrained to be a subset of the valid time for a node’s parent. We extend the XPath query language with an axis to access nodes in a valid-time view of the valid time for a node. The view is a calendar-specific formatting of the valid time in XML. By rendering the time in XML, we can reuse nontemporal XPath to extract the desired information within a valid-time axis. The extension is fully backwards-compatible with XPath.

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Author information

Authors and Affiliations

  1. School of Electrical Engineering and Computer Science, Washington State University, Pullman, WA, United State of America

    Shuohao Zhang & Curtis E. Dyreson

Authors
  1. Shuohao Zhang
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  2. Curtis E. Dyreson
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Editor information

Editors and Affiliations

  1. Database Systems Laboratory, University of Aizu, 965-8580, Fukushima, Aizu-Wakamatsu, Japan

    Subhash Bhalla

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© 2002 Springer-Verlag Berlin Heidelberg

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Zhang, S., Dyreson, C.E. (2002). Adding Valid Time to XPath. In: Bhalla, S. (eds) Databases in Networked Information Systems. DNIS 2002. Lecture Notes in Computer Science, vol 2544. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36233-9_3

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  • DOI: https://doi.org/10.1007/3-540-36233-9_3

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-00264-2

  • Online ISBN: 978-3-540-36233-3

  • eBook Packages: Springer Book Archive

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