A comparison of labeling schemes for ancestor queries

  title={A comparison of labeling schemes for ancestor queries},
  author={Haim Kaplan and Tova Milo and Ronen Shabo},
Motivated by a recent application in XML search engines we study the problem of labeling the nodes of a tree (XML file) such that given the labels of two nodes one can determine whether one node is an ancestor of the other. We describe several new prefix-based labeling schemes, where an ancestor query roughly amounts to testing whether one label is a prefix of the other. We compare our new schemes to a simple interval-based scheme currently used by search engines, as well as, to schemes with… CONTINUE READING
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