The paper analyses the existence of heterogeneous data sources in Web, and inconvenience to information retrieval user,it elucidates the theory of information retrieval across heterogeneous data sources and gives an example .
向桂林,张俭恭,陈定权. Metasearcher 检索异质数据源的原理及应用[J]. 现代图书情报技术, 2002, 18(3): 40-42.
Xiang Guilin,Zhang Jiangong,Chen Dingquan. The Theory and Application of Metasearcher Retrieval AcrossHeterogeneous Data Sources. New Technology of Library and Information Service, 2002, 18(3): 40-42.
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