XML数据库的查询技术研究

Research on Query Technology of XML Database

XML Schema作为一种描述XML文档模式信息即结构信息的标准,对于XML索引的建立及查询效率的提高有着重要的作用。现在大部分XML索引结构着重研究XML文档的结构查询。本文在比较研究了现有的区间编码方式和XML索引技术的基础上,提出了一种基于Schema的XML索引技术SBXI(Schema-Based XML Indexing)。SBXI充分利用了XML Schema建立XML索引从而提高路径查询的效率,并进一步展望未来的研究方向。

As a standard of describing the scheme information or structure information of XML document,XML Schema plays an important role in the building of XML indexing and improving of the query efficiency.Now most of the XML indexing structures focus on studying the structural query.Comparing the current region encoding and XML indexing technique,the paper brought forward a kind of XML indexing based on XML Schema SBXI（Schema-Based XML Indexing）.SBXI made the most of the XML Schema to build the XML indexing to improve the efficiency of path querying and prospected the future research directions.