【摘要】 基于网格的异构数据源访问体系定义了一套通用的数据访问接口,包括结构化查询操作和非结构化查询操作。该体系采用基于网格基础构件的多层结构设计,包括附加在各个数据源之上的访问代理层和用于负责维护模板库和逻辑映射表的仲裁机构,通过在访问代理层实现与实际数据源相关的转换操作来提供对通用数据访问接口的支持。该体系实现了真正意义上的语句透明,并在最大限度上提供了数据的自动集成。更多还原

【Abstract】 This paper proposed the system of heterogeneous data resource access based on grids,which defined a set of universal data access interface,including the structured query operation and unstructured query operation.The system utilized the design of multilayer structure based on grid infrastructure,which consisted of the access agent layer on every data resources and mediator mechanism responsible for logical mapping.The implementation of the conversion operation relating to actual data resources in the access agent layer provided the support of universal data access interface.The system implemented the data transparence really and provided the automatic data integration to the greatest extent.更多还原