Can anybody please tell me what is submachines? In which prospective it is different from state machine diagram :?: :?: :?:
Sorry for my late reply. A state machine, so-called submachine, may be invoked as part of another state machine. It is not attached to a class but instead a kind of state machine subroutine. It has semantics as if its contents are duplicated and inserted at the state that references it.
If there is any further inquiry, please feel free to contact me.