In this Paper, we first introduce workflow, Web Services and the BPEL4WS. Then webriefly analyze the framework of Twister which is an open source project.

• 本文首先介绍工作流管理,Web 服务技术和BPEL4WS,接着讨论了BPEL4WS 规范的基本结构,并简要分析了开放源代码Twister 系统构架。