异构数据源数据集成的研究

对象代理模型可以作为数据集成的一种通用数据模型。通过建立代理对象和源对象，查询处理的对应关系也能够较好地实现，应用可以将不同的、对于代理对象的查询处理翻译成对于局部数据源源对象的查询处理，也可以把对局部数据源的查询结果以用户应用想要的方式返回。对象代理模型可在Smalltalk环境中实现。本文讨论如何在Smalltalk
k环境中实现基于对象代理模型的异构信息源的集成。

Research of the Data Integration of Heterogeneous Data Sources

Object deputy model can be used as a common data model for information integration.Through establishing the source objects and deputy objects,the corresponding relations about query handling can be implemented better.According to the object deputy model,application translates the query disposal of the deputy objects into the query disposal of the local database sources,and it also returns query results from the local database sources by the user's application requirements.The object deputy model can be implemented in the Smalltalk environment.In this paper,we discuss how to realize the data integration of heterogeneous data sources based on the object deputy model in a Smalltalk environment.