一种支持 NF￣2 和多媒体的数据模型

A Data Model of Supporting NF 2 and Multimedia

支持ＮＦ２（Ｎｏｎ－ｆｉｒｓｔ－ｎｏｒｍａｌ－ｆｏｒｍ）和多媒体的数据库系统ＮＦＭＤＢ是在关系数据库ＲＤＢＭＳ的基础上研制的，它是一种扩充了的ＤＢＭＳ。系统采用了扩充的关系数据模型，它支持ＮＦ２和多媒体的数据存储和数据操作。本文重点介绍了ＮＦＭＤＢ系统支持ＮＦ２和多媒体的数据模型，以及基于数据字典的实现方案，系统具有处理复杂对象的能力。

Supporting NF 2 and multimedia data base system NFMDB is designed from the relational RDBMS and it is an externed DBMS.The system is an extened relational data model which supports NF 2 and multimedia data storing and data operating. A data model which supports NF 2 and multimedia data, and an implementatioan scheme based on the data dictionary is proposed. This system has the abilities of dealing with complex objects.