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Answering ordered tree pattern queries over fuzzy XML data

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Abstract

The widespread employment of XML requires the development of efficient methods to support advanced tree pattern queries. In addition, in real-world applications that involve analysis and management of databases, uncertainty is often an inherent property of data. Although a large number of researches have been dedicated to modeling uncertain XML and answering queries over uncertain XML data, how to conduct order-based tree pattern queries on fuzzy XML data remains an open problem. In this work, we aim to fill this gap and tackle the problem of order-based queries on fuzzy XML data. Based on the node encoding, we propose efficient tree pattern matching algorithms serving for ordered queries over fuzzy XML data. In particular, our algorithms adopt a two-phase processing technique: the first phase generates the root-to-leaf path solutions, and the second phase merges these path solutions for producing the desired matches to the ordered tree pattern. Typically, our approach only needs to access data related to the query nodes in the tree pattern once to obtain all the matching answers. Finally, a comprehensive experimental evaluation is carried out to investigate the performance of the proposed approaches.

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Notes

  1. Since OTP could directly transform itself into previous holistic matching approaches (e.g., HolisticTwig [17], C-Twig [18], etc), we omit the comparison between our proposed algorithms and previous holistic matching approaches.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (60873010) and the Fundamental Research Funds for the Central Universities (N090504005 and N100604017). The authors would also like to express their gratitude to the anonymous reviewers for providing very helpful suggestions. Many thanks are due to Mr. Qv for helpful comments and suggestions.

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Authors and Affiliations

  1. School of Information Science and Engineering, Northeastern University, Shenyang, 110004, China

    Jian Liu & Z. M. Ma

  2. The General Hospital of Shenyang Military Command, Shenyang, 110004, China

    Xue Feng

Authors
  1. Jian Liu
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  2. Z. M. Ma
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  3. Xue Feng
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Correspondence to Jian Liu.

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Liu, J., Ma, Z.M. & Feng, X. Answering ordered tree pattern queries over fuzzy XML data. Knowl Inf Syst 43, 473–495 (2015). https://doi.org/10.1007/s10115-014-0731-5

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  • DOI: https://doi.org/10.1007/s10115-014-0731-5

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