摘要： 讨论了基于XML的Web异构数据源集成系统中的查询处理,并提出了针对全局视图的语义缓存的实现方法,包括查询与缓存入口的匹配算法,网络环境下缓存建立和淘汰算法;最后描述了Gav模式集成方式下的查询分解和优化方法。

关键词: 异构数据源, XML, DTD, 查询处理, 语义缓存

Abstract: This paper focuses on query processing in XML-based heterogeneous data integration system on Web. A semantic cashing implementation based on global view is given, which includes the cach matching algorithm and caching creation algorithm. At last, query decomposition and query plan optimization is described.

中图分类号: 

• TP311