摘要
产生于工作流系统的执行阶段、未在系统建模阶段进行描述和定义的突发事件 ,称为工作流意外事件 .对应意外事件的处理过程 ,称为意外处理 .该文针对意外事件 ,从系统建模与模型执行两个方面对工作流意外处理进行了探讨 .在系统建模阶段 ,通过拓展Petri网中的基本概念 ,提出并构造了组成工作流的过程单元 ,在将工作流内在的逻辑关系分解为控制流与数据流的基础上 ,讨论了一个面向意外处理的工作流系统复合建模方法 .对应工作流的模型执行 ,定义了两类意外处理 ,用矩阵形式分别表示或标识控制流、数据流和意外事件 ,经过矩阵分析与变换 ,对意外事件的影响区域进行范围界定 .最后 。
The exceptions of workflow system are those issues taking place during execution but excluded in modeling, and the corresponding handling process is exceptions handling. For better handling the exceptions, the countermeasures are explored from workflow modeling and its performance. A framework of process unit developed from Petri net underlies workflow modeling. Furthermore, an approach of compound modeling is put forward oriented toward the exception handling after decomposing the workflow relationship into control-flow and data-flow. In conformance with model's performance, the exception handling is categorized into two kinds according to the impact on workflow infrastructure caused by the exceptions. The control-flow, the data-flow and the exceptions are labeled by matrix respectively and the sphere of the exception handling can be deduced from the transformation of the matrices. At last, a handling instance oriented toward data-flow exceptions is presented.
出处
《计算机学报》
EI
CSCD
北大核心
2003年第9期1094-1103,共10页
Chinese Journal of Computers
基金
南京大学博士后科研基金 ( 0 2 0 2 0 0 3 0 13 )
南京大学人才引进基金( 0 2 0 2 0 0 5 10 6)资助
