工程设计数据库管理中版本模型的研究

STUDY OF A 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．文中提出了设计对象的概念，以设计对象为基础组织和描述完整的产品设计信息，建立了设计对象之间的组合联系、等价联系以及版本联系，提出了设计对象的层次模型表示方法．针对工程数据管理的特点建立了其版本机制，提出了设计对象版本历史、对象版本之间的联系等概念，研究了设计对象的版本操作——检入／检出、当前版本的选择以及版本的动态配置等主要内容．

Version management is very important in engineering data management,and is a method to maintain consistency of design data.A notion of design object is proposed,based on which the design information of product is described.The composed relation,version relation,and equivalent relation are used to establish the relation design object.A version mechanism is established in the paper for engineering data management.A hierarchical model of design object is proposed.Some notions such as version history of design object,relations of version history of design object,and so on are proposed.A data model of version mechanism is established.Finally,the operation (check in/check out,selection of current version,dynamic configuration of version and so on) of version object is analyzed.