Advertisement

Extending the Tractability Results on XPath Satisfiability with Sibling Axes

  • Yasunori Ishihara
  • Shogo Shimizu
  • Toru Fujiwara
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6309)

Abstract

This paper extends the tractability results on XPath satisfiability with sibling axes under DC-DTDs, which were presented by the authors at DBPL 2009, in the following two directions. First, we provide a condition to extend a class of DTDs without spoiling the tractability of XPath satisfiability, provided that only child, descendant-or-self, parent, ancestor-or-self, following-sibling, and preceding-sibling axes, path union, and qualifier are taken into account. By applying the condition to DC-DTDs, we obtain a strictly broader but still tractable class of DTDs, where operators ? (zero or one occurrence) and + (one or more occurrences) are allowed in regular expressions in a restricted manner. Second, we extend the existing method of analyzing the satisfiability under DC-DTDs to a broader class of XPath expressions. Then, we show that the extended satisfiability analysis can be performed efficiently for a new subclass of XPath expressions.

Keywords

Regular Expression Tractable Class Content Model Candidate Node Schema Graph 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Benedikt, M., Fan, W., Geerts, F.: XPath satisfiability in the presence of DTDs. In: Proceedings of the Twenty-fourth ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems, pp. 25–36 (2005)Google Scholar
  2. 2.
    Benedikt, M., Fan, W., Geerts, F.: XPath satisfiability in the presence of DTDs. Journal of the ACM 55(2) (2008)Google Scholar
  3. 3.
    Genevès, P., Layaïda, N.: A system for the static analysis of XPath. ACM Transactions on Information Systems 24(4), 475–502 (2006)CrossRefGoogle Scholar
  4. 4.
    Genevès, P., Layaïda, N.: Deciding XPath containment with MSO. Data & Knowledge Engineering 63(1), 108–136 (2007)CrossRefGoogle Scholar
  5. 5.
    Genevès, P., Layaïda, N., Schmitt, A.: Efficient static analysis of XML paths and types. In: Proceedings of the ACM SIGPLAN 2007 Conference on Programming Language Design and Implementation, pp. 342–351 (2007)Google Scholar
  6. 6.
    Murata, M., Lee, D., Mani, M., Kawaguchi, K.: Taxonomy of XML schema languages using formal language theory. ACM Transactions on Internet Technology 5(4), 660–704 (2005)CrossRefGoogle Scholar
  7. 7.
    Geerts, F., Fan, W.: Satisfiability of XPath queries with sibling axes. In: Bierman, G., Koch, C. (eds.) DBPL 2005. LNCS, vol. 3774, pp. 122–137. Springer, Heidelberg (2005)CrossRefGoogle Scholar
  8. 8.
    Figueira, D.: Satisfiability of downward XPath with data equality tests. In: Proceedings of the 28th ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, pp. 197–206 (2009)Google Scholar
  9. 9.
    Montazerian, M., Wood, P.T., Mousavi, S.R.: XPath query satisfiability is in PTIME for real-world DTDs. In: Barbosa, D., Bonifati, A., Bellahsène, Z., Hunt, E., Unland, R. (eds.) XSym 2007. LNCS, vol. 4704, pp. 17–30. Springer, Heidelberg (2007)Google Scholar
  10. 10.
    Suzuki, N., Fukushima, Y.: Satisfiability of simple XPath fragments in the presence of DTD. In: Proceedings of the 11th International Workshop on Web Information and Data Management, pp. 15–22 (2009)Google Scholar
  11. 11.
    Ishihara, Y., Morimoto, T., Shimizu, S., Hashimoto, K., Fujiwara, T.: A tractable subclass of DTDs for XPath satisfiability with sibling axes. In: Gardner, P., Geerts, F. (eds.) Database Programming Languages. LNCS, vol. 5708, pp. 68–83. Springer, Heidelberg (2009)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Yasunori Ishihara
    • 1
  • Shogo Shimizu
    • 2
  • Toru Fujiwara
    • 1
  1. 1.Osaka UniversityJapan
  2. 2.Advanced Institute of Industrial TechnologyJapan

Personalised recommendations