基于面向对象技术的PDM系统建模的研究

介绍了PDM系统建模的特殊要求--可扩展性、模块化、前后台的协作;分析了PDM系统涉及的现实对象--产品、项目、文档、人员、工作流等,以及它们的属性和功能.基于面向对象技术,将这些对象的属性、数据、过程和功能封装在相应的类中,用这些类构造了PDM系统的模型.利用类的封装和继承技术,实现了系统模块化、可扩展的要求;利用用户交互和工作流类的控制,实现了前后台协作的要求.

Modeling of PDM System Based on Object-Oriented Technique

The special requirements for the modeling of PDM system-extendible organization, modularized structure and cooperation between the front stage and the back stage are introduced.The objects PDM system refers to-products, projects, documents, personnel and workflow, etc-and their attributes and functions are analyzed. Based on the object-oriented technique, the attributes, data, processes and functions of these objects are packed in the corresponding classes. Composed of these classes, the model of PDM system is set up.With the techniques of encapsulation and inheritance of classes, the requirements of modularization and extendibility are met; with the user interface and the control of the workflow class, the cooperation between the front stage and the back stage is also realized.