Firstly, we set up the ontology knowledge bases in a prededined set of domains based on Yahoo classified category, and retrieval documents using conceptual query expansion to replace traditional methods based on key words.

• 该方法首先利用特定的分类目录(如Yahoo分类层次目录),构建特定领域的Ontology知识库,利用概念的查询扩展代替传统的基于关键词的查询扩展,从而消除词的同义现象和歧义现象;