Deal with the problem of object and relation mapping is to solving the problem of data persistence.

对象和关系的映射实际上是要解决数据持久性问题。

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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.

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。

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Object-relation mapping(ORM) handles persisting objects to and from the records of underlying relation database, it is an object-oriented method to develop application.

对象-关系映射就是把对象映射到关系数据库中的记录，它是完全从面向对象的角度来设计和开发程序的。

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