摘要
通过对XML数据与关系数据进行比较,提出对XML数据查询语言的要求.在Web数据集成系统中,使用XML定义公共数据模型,阐述了XML查询转换技术的相关概念,定义了映射图.提出了XML查询向SQL转换的2个步骤:第一步实现RPE到SPE的转换;第二步将SPE查询重写为SQL查询.描述了其中的关键技术和实现算法,为实现基于XML的数据集成系统提供了理论依据和解决办法.
Requirements for XML query language are presented by comparing XML data and relation data. As common data model （CDM）, XML query must be translated into SQL. The mapping chart is defined. The two steps are proposed. About XML query which transforms to SQL： first step is the realization of RPS to the SPE transformation, second step is the SPE query rewriting as the SQL query. Key technology and algorithm are described to provided the theory basis and the solution for the realization based on the XML data integrative system.
出处
《郑州轻工业学院学报（自然科学版）》
CAS
2007年第2期135-139,共5页
Journal of Zhengzhou University of Light Industry:Natural Science
基金
河南省自然科学基金资助项目(0411010500)
郑州轻工业学院博士基金项目(2004-010)
