Secondly, a dynamic multi-task structure which describes the logical context of tasks, users, CAD data documents was presented. A task wizard was produced to build the multi-task structure at run time.

• 然后提出了体现运行时任务、用户、CAD数据文档之间逻辑关系的多任务结构 ,并构造了一个支持建立这种结构的任务向导流程。