A Time Refinement Framework Based on iUML-B State Machine

Table 1

Classification of timed automata patterns.

Vertical refinement patterns		Horizontal expansion pattern
Incremental refinement pattern	Decomposition refinement pattern
Event prefix	Sequence	Choice
Recursion	Xor	Sequential
Wait	Loop	Timeout
Deadline	—	Time interrupt
Wait until	—	Event interrupt
Timed-event prefix	—	Parallel composition
Periodic-repeat	—	—