Junhu Wang
Jeffrey Xu Yu
ABSTRACT
Tree patterns represent important fragments of XPath. In this paper, we show that some classes of tree patterns exhibit such a property that, given a finite number of tree patterns P1, ..., Pn, there exists another pattern P (tree pattern or DAG-pattern) such that P1, ..., Pn, are all contained in P, and for any tree pattern Q belonging to a given class C, P1, ..., Pn, are contained in Q implies P is contained in Q.
- M. Benedikt, W. Fan, and G. Kuper. Structural properties of XPath fragments. Theor. Comput. Sci., 336(1), 2005. Google Scholar
Digital Library
- L. V. S. Lakshmanan, H. Wang, and Z. J. Zhao. Answering tree pattern queries using views. In VLDB, 2006. Google ScholarDigital Library
- G. Miklau and D. Suciu. Containment and equivalence for a fragment of XPath. J. ACM, 51(1), 2004. Google ScholarDigital Library
- J. Wang, J. X. Yu, and C. Liu. Independence of containing patterns property and its application in tree pattern query rewriting using views. The World Wide Web Journal, 12(1). Google ScholarDigital Library
Index Terms
- Minimal common container of tree patterns
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