 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
• |
A
formal description technique standardized in
|
|
|
1988 by International Telecommunication Union
|
|
• |
Intended
for description of communication
|
|
|
protocols
|
|
|
• |
Used
on a variety of distributed, concurrent,
|
|
|
communicating,
asynchronous systems
|
|
|
• |
Many support tools exists, but no framework for
|
|
theorem-proving
based verification
|
|
|
• |
Main
building blocks are processes represented
|
|
|
by extended finite-state machines and delaying
|
|
|
and
instantaneous communication links
|
|