在每个子系统中，本文分别从支持面向对象和主动机制技术的角度，分析了子系统的组成、工作流程、用户使用模式和典型算法等。

In each subsystem, the paper analyses its form, working process, user's model and typical algorithms from the point of object-oriented and technology of active mechanism separately.

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介绍对象关系数据库设计的工作流程，讨论如何将类模型映射到关系模型。

This article introduces the work stream in designing of object relation database, and mainly discusses the ways of mapping from the class model to the relational model.

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