| VCOHOR:一个面向复杂对象的版本模型 |
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| 引用本文： | 刘秉毅.VCOHOR:一个面向复杂对象的版本模型[J].军械工程学院学报,1995(3). |
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| 作者姓名： | 刘秉毅 |
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| 作者单位： | 军械工程学院电工教研室 石家庄 |
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| 摘 要： | 复杂(组合)对象的版本管理是工程数据库的重要组成部分,承担着工程DBMS定义、描述和操作同一对象的多个不同的表示或一致性状态、支持工程设计反复性和试探性过程的综合控制任务。而版本化复杂对象的数学模型、版本控制机制的逻辑设计以及版本对象的差分存贮等一直是工程数据库版本管理的重点和难点,笔者在以上诸方面进行了有益的探索。
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| 关 键 词： | 工程数据库 版本 复杂对象 历史数据库 数据模型 |
VCOHOR: A COMPLEX-OBJECT-ORIENTED VERSION MODEL |
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| Liu Bingyi.VCOHOR: A COMPLEX-OBJECT-ORIENTED VERSION MODEL[J].Journal of Ordnance Engineering College,1995(3). |
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| Authors: | Liu Bingyi |
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| Institution: | Teaching and Research Section of Ekctrical Engineering |
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| Abstract: | The version management machanism of complex (composite) objects plays an important role in an engineering database, which privides a control mechanism that can define, represent and operate multiple copies of an object and can support for represent, trial-and-error processes of engineering design for engineering DBMS. In this paper, we study profitably the version management problem of complex objects including the mathematical model of version, logical design of version control machanism and difference storage of version object, and this problem is just the important and difficult point in the engineering database. |
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| Keywords: | engineering database versions complex object historical database data model |
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