工程设计数据库管理中版本模型的研究

Study of Version Model of Engineering Design Database Management

版本管理是工程数据库管理中的重要部分，也是保证设计数据一致性的手段。本文针对工程数据管理的特点建立了其版本机制，提出了设计对象的层次模型表示方法，提出了设计对象版本设计历史、对象版本之间的联系等概念，研究了设计对象的版本操作。

Version management is very important in engineering data management, and is a method to maintain consistency of design data. A version mechanism is established in the paper for engineering data meanagement. The hierarchical model of design is proposed. Some notions such as version history of design object and relations of version history of design object and so on are proposed. The data model of version mechanism is established. At last, the operation of version object is analyzed.