设计原则：验证你的代码是否坚持面向对象编程的设计原则。
Design principles: Validates that your code adheres to the design principles of object-oriented programming.
面向对象方法是一种非形式化的建模方法，对建模后的系统缺乏有效的分析和验证手段。
The object-oriented technology is one non-formalized modelling method, lacks the effective analysis and the confirmation method after the modelling system.
本文根据面向对象的工作流建模思想，设计了工作流元模型及其可视化的建模工具。为了验证工作流模型的可用性，开发了工作流执行服务原型系统。
According to that view we design the object-oriented workflow model and the visual model tool, and develop a workflow original system to test the workflow model's usability.
本文根据面向对象的工作流建模思想，设计了工作流元模型及其可视化的建模工具。为了验证工作流模型的可用性，开发了工作流执行服务原型系统。
According to that view we design the object-oriented workflow model and the visual model tool, and develop a workflow original system to test the workflow model's usability.
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