Efficient label encoding for range-based dynamic XML labeling schemes

Authors:
Liang Xu;Tok Wang Ling;Zhifeng Bao;Huayu Wu
Affiliations:
School of Computing, National University of Singapore;School of Computing, National University of Singapore;School of Computing, National University of Singapore;School of Computing, National University of Singapore
Venue:
DASFAA'10 Proceedings of the 15th international conference on Database Systems for Advanced Applications - Volume Part I
Year:
2010

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Abstract

Designing dynamic labeling schemes to support order- sensitive queries for XML documents has been recognized as an important research problem. In this work, we consider the problem of making range-based XML labeling schemes dynamic through the process of encoding. We point out the problems of existing encoding algorithms which include computational and memory inefficiencies. We introduce a novel Search Tree-based (ST) encoding technique to overcome these problems. We show that ST encoding is widely applicable to different dynamic labels and prove the optimality of our results. In addition, when combining with encoding table compression, ST encoding provides high flexibility of memory usage. Experimental results confirm the benefits of our encoding techniques over the previous encoding algorithms.