摘要： 提出了一种信息门户中的基于本体的信息查询模型，该模型主要由两个模块组成：基于领域本体的改进的查询模块和基于模糊本体的逐步精确的查询模块。前者对应于用户能够清楚地表达自己需要的信息，它可以基于相似度对查询结果进行排序。后者则对应于用户不能够清楚地表达自己需要的信息，它可以向用户提出查询建议，逐步精确用户的查询。

关键词: 本体, 相似度, 逐步精确

Abstract: The paper puts forward an information query model based on ontology in information portal. The model is consisting of two parts. One is the improved query module based on the domain ontology, the other is query refinement module based on the fuzzy ontology. The first module is applied in the case that users can express their information needs straightforwardly, and it can rank the results based on the similarity. The second module is applied in the case that users can’t express their information needs straightforwardly, it can give the suggestions to refine the users’ queries.

Key words: Ontology, Similarity, Query refinement

中图分类号: 

• TP311.12