A Prime Number Labeling Scheme for Dynamic Ordered XML Trees

  • Authors:
  • Xiaodong Wu;Mong Li Lee;Wynne Hsu

  • Affiliations:
  • -;-;-

  • Venue:
  • ICDE '04 Proceedings of the 20th International Conference on Data Engineering
  • Year:
  • 2004

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Abstract

Efficient evaluation of XML queries requires thedetermination of whether a relationship exists betweentwo elements. A number of labeling schemes have beendesigned to label the element nodes such that therelationships between nodes can be easily determinedby comparing their labels. With the increasedpopularity of XML on the web, finding a labelingscheme that is able to support order-sensitive queriesin the presence of dynamic updates becomes urgent. Inthis paper, we propose a new labeling scheme thattakes advantage of the unique property of primenumbers to meet this need. The global order of thenodes can be captured by generating simultaneouscongruence values from the prime number node labels.Theoretical analysis of the label size requirements forthe various labeling schemes is given. Experimentresults indicate that the prime number labeling schemeis compact compared to existing dynamic labelingschemes, and provides efficient support to order-sensitivequeries and updates.