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.

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

CLC Number: 

• TP311