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Indexing XML Data for Path Expression Queries

  • Gongzhu Hu
  • Chunxia Tang
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3026)

Abstract

Many XML query languages use regular path expressions to query XML data. Retrieval of XML data is like retrieval of relational databases, but the difference is that relational data are stored in 2-D flat tables whereas XML data are organized in a tree-like structure. Hence, fast tree traversal is a key to XML query processing. This is commonly accomplished using indexing. In this paper, we present a design and implementation of an efficient and quick solution to indexing XML data. Our approach is based on a numbering scheme that encodes the XML elements for not only indexing to the elements but also for quick determination of the ancestor-descendant relationship between elements in the tree hierarchy. This approach also allows efficiently inserting and updating the index system, which is an improvement over several existing XML tree node numbering methods.

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References

  1. 1.
  2. 2.
    Chamberlin, D., Florescu, D., Robie, J., Simon, J., Stefanescu, M.: XQuery: A Query Language for XML. W3C working Draft, Technical Report WD-xquery-20010215, World Wide Web Consortium (2001)Google Scholar
  3. 3.
    Clark, J., DeRose, S.: XML Path Language (XPath) Version 1.0. W3C Recommendation. Technical Report REC-xpath-19991116, World Wide Web Consortium (1999)Google Scholar
  4. 4.
    Cooper, B.F., Sample, N., Franklin, M.J., Hjaltason, G.R., Shadmon, M.: A Fast Index for Semistructured Data. In: Proceedings of the 27th International Conference on Very Large Databases, Rome, Italy (2001)Google Scholar
  5. 5.
    Dietz, P.F.: Maintaining order in a Linked List. In: Proceedings of the Fourteenth Annual ACM Symposium on Theory of Computing, San Francisco, California (1982)Google Scholar
  6. 6.
    Egnor, D., Lord, R.: Structured Information Retrieval Using XML, http://www.haifa.il.ibm.com/sigir00-xml/final-papers/Egnor
  7. 7.
  8. 8.
  9. 9.
    Katz, H.: XQEngine, http://www.fatdog.com
  10. 10.
    Kha, D., Yoshikawa, M., Uemura, S.: An XML Indexing Structure with Relative Region Coordinates. In: Proceedings of the 17th International Conference on Data Engineering, Heidelberg, Germany (2001)Google Scholar
  11. 11.
    Larson, R.R.: Cheshire II Project, http://cheshire.lib.berkeley.edu
  12. 12.
    Li, Q., Moon, B.: Indexing and Querying XML Data for Regular Path Expressions. In: Proceedings of the 27th International Conference on Very Large Databases, Rome, Italy (2001)Google Scholar
  13. 13.
    Luk, R., Chan, A., Dillon, T.S., Leong, H.V.: A survey of search engines for XML documents. In: SIGIR 2000 Workshop on XML and Information Retrieval, Athens, Greece, pp. 1–9 (2000)Google Scholar
  14. 14.
    McHugh, J., Widom, J., Abiteboul, S., Luo, Q., Rajaraman, A.: Indexing Semistructured Data. Technical Report, Stanford University (1998)Google Scholar
  15. 15.
    Rizzolo, F., Mendelzon, A.: Indexing XML Data with ToXin. In: Fourth International Workshop on the Web and Databases (in conjunction with ACM SIGMOD 2001), Santa Barbara, California (2001)Google Scholar
  16. 16.
    Shanmugasundaram, J., et al.: Relational Databases for Querying XML Documents: Limitations and Opportunities. In: Proc. Of the 25th International Conference on VLDB, Edinburgh, Scotland (1999)Google Scholar
  17. 17.
    Structured Information Manager, http://www.simdb.com
  18. 18.
    Tian, F., DeWitt, D.J., Chen, J.: The Design and Performan ce Evaluation of Alternative XML Storage Strategies: SIGMOD Record special issue on Data Management Issues in E-Commerce (2002)Google Scholar
  19. 19.
    Turau, V.: Making Legacy Data Accessible for XML Applications, http://www.informatik.fh-wiesbaden.de/turau/veroeff.html
  20. 20.
    Yoon, J., Raghavan, V., Chakilam, V., Kerschberg, L.: BitCube: A Three-Dimensional Bitmap Indexing for XML Documents. Journal of Intelligent Information Systems 17 (2001)Google Scholar
  21. 21.
    Yoshikawa, M., Amasaga, T., Shimura, T., Uemura, S.: XRel: A Path-Based Approach to Storage and Retrieval of XML Documents using Relational Databases. ACM Trans. On Internet Technology (2001)Google Scholar
  22. 22.
    XDisect - XML Refined Search, http://www.pybiz.com/products/xdisect
  23. 23.
    Xset Enabling XML Applications, http://www.cs.berkeley.edu

Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Gongzhu Hu
    • 1
  • Chunxia Tang
    • 1
  1. 1.Department of Computer ScienceCentral Michigan UniversityMount PleasantUSA

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