基于本体的数据集成系统的设计与实现

Design and Implementation of Database Integration System Based on Ontology

针对当前对异构数据源的数据集成中存在的语义异构问题,尤其是元素层的语义异构,通过分析现有的基于XML数据集成方法的基础上,将系统的设计分为三层,其中在数据层实现对异构数据源XML模式的包装,而在用户层和数据层之间增加一个中间层来实现全局查询到局部查询的转换。同时将本体论的思想引入集成系统框架,通过在中间层建立全局本体库和局部本体库,以及构建本体库之间的映射关系,解决了数据集成中异构数据源元素层的语义异构问题。

In light of the semantic heterogeneous problems existing in the data integration of the heterogeneous data sources,especially the semantic layer of heterogeneous elements,the system can be designed into three layers through the existing XML-based data integration.The XML model heterogeneous data sources can be packed in the data layer.The conversion from global queries to local queries can be realized in the middle layer,which is added between user layer and data layer.Also brings the ontology into the integrated system framework,through the middle layer to establish the global ontology and local ontology database libraries,as well as building a mapping between ontology library,to solve the semantic heterogeneous problems in the data integration of the heterogeneous data sources.