Hi,I'm sorrol.You Know,the JBPM5.4 don't have Organization Structure.So,I hope to do some expansion on User-Group Model of the original.I want to Know,do you have some good advice in this wok.(eg:which interface could be extended...) thank you very much john sorrol carefully 张书瑞 广州中科院工业技术研究院 工程结构分析与测试技术研究中心 联系电话：15013074086 sorrol(a)163.com