摘要
讨论了ＣＡＤ／ＣＡＭ环境下支持合作设计过程的工程数据库事务模型及其实现方法，该模型是对传统的基于ＡＣＩＤ性质的平面事务模型的修改和扩充．它具有一个嵌套的事务结构和数据对象代理机制，能够较好地满足设计过程的长期性、合作性和用户控制的要求．
The design transaction management is one of the critical technologies of EDBMS. Due to the complexity of the controlled cooperative work, the long duration of design processes and the enormous number of objects involved, a suitable transaction model for the designers to access the EDB must be satisfied by EDBMS. This paper lays emphasis on the design transaction model under the environment of the CAD/CAM. This model is developed from the tranditional transaction model based on the ACID properties. It adds a nested transaction structure and a mechanism of object delegation. A main objective of this model is to support cooperative work in the CAD/CAM enviroment.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1998年第1期48-56,共9页
Journal of Nanjing University（Natural Science）
关键词
工程数据库
事务模型
合作事务
面向对象
engineering database
transaction model
cooperative transaction
objectoriented
