摘要： 为了提高工作流模型的适应性，通过建立统一的资源管理器模型，解决了工作流网的资源分配问题，得到了一致的资源请求和资源释放过程。在引入着色Petri 网的基础上，得到更加容易控制和计算机化的着色工作流网模型。最后，定义并将适合于工作流的事件-条件-动作规则引入着色工作流网，提出了基于ECA 原语的工作流模型描述机制。

关键词: 工作流模型；着色Petri 网；着色工作流网；事件-条件-动作规则

Abstract: At present, the workflow models based on Petri net are either too simple or too difficult to analyse structure and performance. And thus its application is not satisfying in practical use. In order to enhance the adaptability of the models, the paper solves resource-allocating problem and gets the same resource request and release process through constructing unified resource manager. Based on introducing colored Petri net, the paper gets colored WF-net, which is easy to control and computerize. Finally, the event-condition-action (ECA) rules are defined according to characters of workflow and a description mechanism of workflow model based on ECA notation is proposed.

Key words: Workflow model; Colored Petri net (CPN); Colored WF-net; ECA rule