CSCW中数据表示方法是其重要的支撑环境，由于CSCW多用户协作的特点，必须对各用户的处理情况进行分别存放和处理。并需要保存带时间因素的数据。本文提供了在CSCW数据存放过程中表示时态数据的模型，说明了存储过程中的问题和解决办法。

Based on the analysis of the workjlow applications, the modeling process of workflow applications is divided into four levels in this paper. They are Application level, Structure and information level, Execution control level, and Implementation level. An object-oriented model corresponding to the four-level modeling process is also given, expressed in UML. Event mechanism is employed in this paper to realize both the control and distribution mechanism in the logical modeling of workjlow applications, illustrated by an event meta-model consisting of four basic event classes. The event definition and notification mechanisms are separated fiom the event reaction objects, and also the definition of functions and the triggering mechanism of the functions are separated. This may facilitate the dynamic modijkation of the workjlow definitions and also facilitate the description of the distribution of workjlow applications.