作　　者： ; ;

机构地区： 华南理工大学软件学院

出　　处： 《计算机应用与软件》 2007年第12期107-109,共3页

摘　　要： 研究基于XML的异构多源数据查询处理方法。通过引入虚拟全局视图方式以及将LAV(local as view)方法应用于全局视图和局部视图的关系当中来实现异构多源数据查询处理。此外,还研究了支持XML查询处理的XQuery正规化规则及在不同情况下转换FLWR的策略。 Many applications require integrated access to several heterogeneous data sources. Because of the semi-construction characteristic,XML is the best choice as the global schema for querying multi-source heterogeneous data. XQuery is used as the query language. During the querying process, the way of virtual global schema is used, and the method of LAV is applied to describe the relation between global schema and local schema. Furthermore, several XQuery normalization rules are introduced, and the strategy of transferring FLWR in various situations is described.

关 键 词： 异构数据 全局视图

领　　域： [自动化与计算机技术] [自动化与计算机技术]