If I understand your requirment correctly you are looking for something like GlobalUserTask from BPMN2. It is a user task globally defined so it can be accessed from many processes using call activity.
Unfortunately it is not yet implemented (afaik) but you could go for process definition that will have only that one user task with all the io specification and then reuse this process in other processes by making use of call activity construct.
Hi, Maciej Swiderski ,Thank you for your reply.
Mh.I want to extend the default process constructs with domain-specific extensions, that is User Task's extensions.
I means that I could create a new User Task component defined by myself(eg...groupid defined as HM,and It isn't necessary to input parameter in Task Properties),then I could use this component like default User Task
Execuse me ,Maciej Swiderski
you said 'reuse this process in other processes by making use of call activity construct', ａｎｄ I ｗａｎｔ ｔｏ ｋｎｏｗ ｈｏｗ ｔｏ ｍａｋｅ ｕｓｅ ｏｆ ｃａｌｌ ａｃｔｉｖｉｔｙ ｃｏｎｓｔｒｕｃｔ．
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Hi, Maciej Swiderski
I got your idea,Thank you for your help.