六个基本实体：工作流定义、活动、转换条件、工作流相关数据、角色、应用程序，几个实体加上管理部分基本可以实现接口，这里的活动就是库所，转换条件对应的是条件和变迁，可贵的是文档里介绍了表结构，对状态、类型等也作了枚举，简单介绍了Petri网结构，最重要的是介绍了基于关系型数据库的建模，介绍了几个条件路由，后面就是流程运转的核心部分，也是有限状态机实现-Six basic entities: the workflow definition, activity, conversion conditions, workflow relevant data, role, application, several entities can be achieved with some of the basic management interface, the activities that libraries are here, the conversion corresponding to the terms and conditions changes, valuable in introducing the document the table structure, status, type of enumeration also made a brief introduction of the Petri net structure, the most important thing is introduced based on relational database modeling, routing, introduced several conditions , running back is a core part of the process is finite state machine implementation