The problem of constructing global view of heterogeneous information sources for information sharing is becoming more and more important due to the availability of multiple information sources within the virtual organization. Global view is defined to provide a unified representation of the information in the different sources by analyzing concept schemas associated with them and resolving possible semantic heterogeneity. An ontology-based method for global view construction is proposed. In the method, (1) Based on the formal ontologies, the concept of semantic affinity is introduced to assess the level of semantic relationship between information classes from different information sources; (2) Information classes are classified by semantic affinity levels using clustering procedures so that their different representations can be analyzed for unification; (3) Global view is constructed starting from selected clusters by unifying representation of their elements. The application example of using the method in the joint-aerial defense organization is illustrated and the result shows that the proposed method is feasible.
信息集成是实现虚拟组织信息共享的重要手段.从实现虚拟组织信息共享出发,深入研究了如何构建虚拟组织信息集成全局视图与本地视图之间的映射关系,提出了一种基于本体的两阶段视图映射关系构建方法.在映射关系创建阶段,采用GAV(Global as View)方法思想,分析了如何基于本体生成视图映射关系;在映射关系调整和维护阶段,采用LAV(Local asView)方法思想,研究了如何基于本体来动态调整和维护视图映射关系.通过实例分析具体说明了所提出方法的工作流程和应用.
