Description and Access Mechanism of Workflow Data
In order to solve the problem in establishing data flow in existing workflow management systems,conceptions of interior data flow and exterior data flow are introduced in this paper. Based on analyzing characteristics of data flows,a new architecture of data management for workflow in distributed environments is put forward. By making that the running nodes in the running level are responsible for the control flow,the data nodes in the data level are responsible for the data flow,and the execution of receiver activities on the running nodes triggers the data replication mechanism of the data level,the required data flow between running nodes can be established. Compared with the existing methods of data flow implementation,the proposed method of data description and data access mechanism provide a data transfer means for the exterior data,and convenient the description and implementation for the interior data. The proposed method has value in designing data management in workflow management system.