XML数据库查询及优化研究

随着网络信息的大量涌现和广泛应用,原来简单的信息发布技术已经不能满足必需的信息交流与共享,XML(eX tensibleMarkupLanguage)的出现似乎为上述问题的解决提供了转化。随着XML技术的不断成熟,要构建基于XML的各种应用,从XML数据源中准确有效地查询所需信息,也就变得越来越重要。文中对XML数据库查询语言及对半结构化数据查询、转换输出、数据集成、XML数据索引、结构模糊查询展开分析,详细探讨了XML查询语言的特点、模式、处理过程和查询优化等技术。

Research on Query and Optimization of XML Database

With the development and application of network information, the method of information issuance is too simple to satisfy on the interchange and share of the information. XML provides a transform to solve the problem. With the maturity of XML technology, it becomes more important to establish various application based on XML and more important to query information effectively and exactly from XML data source. In the paper a new query language and the query in semistructured data, transform output, integration of data and index in XML data are introduced. The structure, usage, optimization of query language of XML are also discussed.