Inclusion Dependencies in XML: Extending Relational Semantics

  • Authors:
  • Michael Karlinger;Millist Vincent;Michael Schrefl

  • Affiliations:
  • Johannes Kepler University, Linz, Austria;University of South Australia, Adelaide, Australia;Johannes Kepler University, Linz, Austria

  • Venue:
  • DEXA '09 Proceedings of the 20th International Conference on Database and Expert Systems Applications
  • Year:
  • 2009

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Abstract

In this article we define a new type of integrity constraint in XML, called an XML inclusion constraint (XIND), and show that it extends the semantics of a relational inclusion dependency. This property is important in areas such as XML publishing and `data-centric' XML, and is one that is not possessed by other proposals for XML inclusion constraints. We also investigate the implication and consistency problems for XINDs in complete XML documents, a class of XML documents that generalizes the notion of a complete relation, and present an axiom system that we show to be sound and complete.