Model and Instance Design Pattern in Workflow Management System Development
模型与实例设计模式在工作流管理系统设计中的应用

A software design pattern, model and instance, is described in this article. The model and instance design pattern is widely used in development of workflow management system to deal with the relation between model and instance. Then an application of model and instance design pattern in a workflow management system is introduced to show the usage of this design pattern.