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| XML数据索引技术 |
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孔令波1, 唐世渭1,2, 杨冬青1, 王腾蛟1, 高军1
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1.北京大学,计算机科学技术系,北京,100871;2.北京大学,视觉与听觉信息处理国家重点实验室,北京,100871
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| 摘要: |
| 对XML数据建立有效的索引,是左右XML数据处理性能的重要因素.深入地讨论了目前XML索引技术的研究现状,将XML索引技术分为两大类:节点记录类索引(本身还可以分为3个小的类型)和结构摘要类索引.根据XML数据查询处理效率以及XML数据修改对XML索引的要求,讨论了相关XML索引方法的优点和不足,并归结出XML索引后续研究的3个方向:XML结构信息的获取,路径信息的多维处理,数据修改合法性的有效支持,以及涉及能够同时有效满足XML查询和信息获取的索引. |
| 关键词: XML索引 区间编码 B-E-L模型 节点赋数 双似 k阶双似 结构摘要 XML数据修改 增量式验证 XML信息获取 |
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| 基金项目:Supported bythe National High-Tech Research and Development Plan of China under Grant Nos.2002AA423440,2005AA423070(国家高技术研究发展计划(863)) |
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| XML Indices |
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KONG Ling-Bo,TANG Shi-Wei,YANG Dong-Qing,WANG Teng-Jiao,GAO Jun
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| Abstract: |
| XML has become the de facto standards for data representation and exchange on Web applications, such as digital library, Web service, and electronic business, etc. Indexing technique is still significant for efficient XML data processing. This paper discusses the actualities of the recent researches on XML indexing. It classifies the techniques into two categories, node-record-style index with three subcategories, and structural-summary-style index. It analyzes the virtue and deficiency of the related schemes based on the considerations for query processing efficiency and data modification supporting. And hereby it proposes three issues for future XML indexing researches, including internal structure retrieval, multi-dimensional processing on node paths, efficient modification-validating support and the index amalgamation for satisfying both querying and IR on XML data. |
| Key words: XML index interval encoding B-E-L model node numbering bisimilarity k-bisimilarity structural summary update XML incremental validation XML information retrieval |
