基于本体的关系数据库关键词语义查询扩展方法  

A semantic expansion method of keywords query based on Ontology over relational database

作　　者：郗君甫[1] 刘国华[1] 唐军军[1] 祁瑞丽[1] 朱鹤[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2010年第3期231-235,240,共6页Journal of Yanshan University

基　　金：国家自然科学基金资助项目(60773100);国家"十一五"科技支撑计划资助项目(2006BAK05BO2);河北省自然科学基金资助项目(F2009000475)

摘　　要：目前关系数据库关键词查询技术主要利用关键词的语法匹配,而没有利用数据之间的语义关系进行匹配,导致查询效果往往都不太令人满意。为了改善查询效果,结合本体概念,提出了基于本体的关系数据库关键词查询的语义查询扩展方法,把用户提交的查询关键词扩展为基于本体的语义关键词。实例分析表明,扩展后的语义关键词尽可能符合用户的真实意愿。At present,in the query of relational database,matching is performed mainly according to the syntax of the keywords,instead of the semantic relation between data,which lead to an undesirable query results.In order to improve the query effect,combining with the concept of Ontology,a semantic expansion method is put forward based on Ontology for keywords query over relational database,which extends the query keywords provided by users to the semantic keywords based on Ontology.Sample analysis shows that the query results of this method are much closer to the users＇ request.

关 键 词：关键词 本体 概念树 语义相似度 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]