Efficient creation and incremental maintenance of the HOPI index for complex XML document collections

@article{Schenkel2005EfficientCA,
  title={Efficient creation and incremental maintenance of the HOPI index for complex XML document collections},
  author={Ralf Schenkel and Anja Theobald and Gerhard Weikum},
  journal={21st International Conference on Data Engineering (ICDE'05)},
  year={2005},
  pages={360-371}
}
The HOPI index, a connection index for XML documents based on the concept of a 2-hop cover, provides space- and time-efficient reachability tests along the ancestor, descendant, and link axes to support path expressions with wildcards in XML search engines. This paper presents enhanced algorithms for building HOPI, shows how to augment the index with distance information, and discusses incremental index maintenance. Our experiments show substantial improvements over the existing divide-and… CONTINUE READING
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