面向对象的科研数据库管理系统

Object-Oriented Database Management System of Scientific Research Information

介绍一个面向对象的科研信息数据库管理系统的设计与实现。首先定义了能够存储和操纵多媒体数据的图文字段；其次较为深入地探讨了类、对象及其关联在关系数据库中的存储表示方法，提出了使用操作标识与历史标识两类对象标识辅助系统进行对象存储管理的策略；接着探讨并实现了对象的查询及优化；最后介绍了系统的管理流程。

The design and realization of an object-oriented scientific research information database management system based on a relational database is introduced in this paper. First of all,the graph-text field which can store and manipulate multimedia data is defined. Then,the methods how classes,objects and the relevance between classes are stored in relational database are probed deeply. Both operation —identification and history-identification which can assist the system with storage management of objects are set up. Furthermore,the query optimization of objects is researched and realized. Finally,the management process of the system is explained.