NHMDB is a multimedia database system based on the extended relational data model and has the characteristics of object-oriented databases.

NHMDB是基于扩充关系数据模型的多媒介数据库系统，它以扩充关系为基础支持面向对象的主要特性。

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This article discusses a new mapped method of object model and database model, which has been employed to design an object-oriented relational database.

利用一种对象模型与数据库模型的映射方法，完成了一个面向对象的关系数据库设计。

youdao

This article discusses a new mapped method of object model and database model, which has been employed to design an object-oriented relational database.

利用一种对象模型与数据库模型的映射方法，完成了一个面向对象的关系数据库设计。

youdao