符合SDAI的工程数据管理系统的实现研究

从数据管理最基本的持久化功能入手,在SDA C+ +管理类、早/晚联编的数据访问方式、早/晚联编混合操作等几项关键技术方面,提出了对EXPRESS模型作O-O扩充、实现对象的自身-O功能、适当扩展SDAI语义、实现面向对象的封装和动态联编等解决方案,并利用技术方案开发出一个满足CAx应用的原型系统.

Research and Implementation of SDAI-Based Engineering Data Management System

Beginning with the most fundamental persistence function, solutions were presented which involve expanding EXPRESS model using Object oriented Modeling Technology; extending SDAI contents properly; achieving objects' self supplied I/O function; and implementing the object oriented encapsulation and dynamic binding, on several key technologies such as the SDAI/ C++ management classes, the early/late binding data access methods and the combined early/late binding operations. Using these solutions, one prototype system is developed. The motive to carry out this system is to meet the need of the integration of CAx application systems based on STEP.