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TwigStar——快速处理XML Twig查询中含通配符*的算法 被引量:3

Efficient Processing of XML Twig Queries with Star-Wildcard
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摘要 XMLTwig查询可以表示为一棵带标签结点的查询树,它支持对XML文档进行带有复杂谓词的结构或内容查询.整体(holistic)Twig查询算法已经被公认为XML查询处理的核心算法.很多学者提出了大量基于整体处理的XML Twig查询算法.但是目前已有的算法都只适合于Twig查询中不包含通配符*的情况.而当Twig查询中包含通配符*时,一种简单而直接处理的方法就是,把被查询文档中的所有结点元素都读到内存,把这些元素都看做通配符*所对应的元素,然后按照已有的算法进行查询处理.显然这种方法是不合理的,它会增加大量I/O开销.因此提出了一种有效地支持通配符*的查询处理算法.通过建立索引,它可以很好地处理含通配符*的查询,从而可以避免不必要的I/O开销.最后通过实验证明,算法要明显好于已有的算法.
出处 《计算机研究与发展》 EI CSCD 北大核心 2006年第z3期430-437,共8页 Journal of Computer Research and Development
基金 国家自然科学基金项目(60573094) 清华大学基础研究基金项目(JCqn2005022) 浙江省自然科学基金项目(Y105230)
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参考文献33

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同被引文献37

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