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Incremental Validation of String-Based XML Data in Databases, File Systems, and Streams

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Advances in Databases and Information Systems (ADBIS 2007)

Part of the book series: Lecture Notes in Computer Science ((LNISA,volume 4690))

Abstract

Although the native (tree-like) storage of XML data becomes more and more important there will be an enduring demand to manage XML data in its textual representation, for instance in relational structures or file systems. XML data has to be wellformed by definition and additionally, in many cases, it has to be valid according to a given XML schema. Because the XML column types are often derived from text types (e.g. CLOBs) guaranteeing well-formedness as well as validity is not trivial. And even worse, for frequently modified data it is usually too expensive to re-validate the whole XML data after each update – but waiving re-validation may lead to inconsistencies and malfunctions of applications. In this paper we present a schema-aware pushdown automaton (i.e. a stack machine) that validates an XML string/stream. Using an element/state-index, the pushdown automaton is able to re-validate local modifications of the data while guaranteeing overall validity. Update operations (e.g. SQLXML, XQuery updates) are validated before executing them.

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Authors and Affiliations

  1. Oracle Corporation, 400 Oracle Parkway, 4OP408, Redwood Shores, CA 94065, USA

    Beda Christoph Hammerschmidt

  2. Institute of Information Systems, University of Luebeck, Germany

    Volker Linnemann & Sven Groppe

  3. Institute of Telematics, University of Luebeck, Germany

    Christian Werner, Ylva Brandt & Stefan Fischer

Authors
  1. Beda Christoph Hammerschmidt
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  2. Christian Werner
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  3. Ylva Brandt
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  4. Volker Linnemann
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  5. Sven Groppe
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  6. Stefan Fischer
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Yannis Ioannidis Boris Novikov Boris Rachev

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Hammerschmidt, B.C., Werner, C., Brandt, Y., Linnemann, V., Groppe, S., Fischer, S. (2007). Incremental Validation of String-Based XML Data in Databases, File Systems, and Streams. In: Ioannidis, Y., Novikov, B., Rachev, B. (eds) Advances in Databases and Information Systems. ADBIS 2007. Lecture Notes in Computer Science, vol 4690. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-75185-4_23

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  • DOI: https://doi.org/10.1007/978-3-540-75185-4_23

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-75184-7

  • Online ISBN: 978-3-540-75185-4

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