工作流方面的知識早在兩年前關注過，原本只是規范文檔的，現在已有功能實現了。
看下面的資源：
工作流引擎實現：[shark]
http://forge.objectweb.org/projects/shark/
工作流圖形編輯工具：[jawe]
http://forge.objectweb.org/projects/jawe/
Enhydra Shark is a workflow server with a difference. Shark is
completely based on standards from WfMC and OMG using XPDL as its
native workflow definition language. The Shark framework can be
configured to support different environments.
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Enhydra
JaWE is a graphical Java Workflow Editor according to WfMC
specifications supporting XPDL as its native file format. JaWE can be
used to edit workflow definitions for Enhydra Shark or every other XPDL
conformant Workflow server.
方向:分布式系統設計