Hello Huisheng
Thanks for the reply and sorry for my delay
I don't know what could be done in the node. So I will make some guess.
Well such item component appear here see the menu item components (Figure 7.2. The Properties View of the selected Task Node)
Maybe the node is equals as the TaskActivity, So both of them could create a Human Task and wait the task being completed.
Maybe the node is a container of other Activity, So it is equals as the GroupActivity. But I think the super-state is more like the GroupActivity.
No is neither TaskActivity nor GroupActivity
If you could show more details of the node, I think I could make better guess
According to the book, such node is (see page 113 if you or some friend have the book)
Note the icon inside the node rectangle, a gear, is used to represent the node functionality, meaning that the base functionality for a Node is the generic work to be done, which can probably be represented with a piece of Java code.
Thanks