extension for formal specification of computer network protocol
Protocols are described by modules which are communicating NFA
Modules are arranged in a dynamic hierarchy and communicate at named interaction points.
EstPC (ftp:osi.ncsl.nist.gov/pub/osikit/estpc) Compiles Estelle into C.
Translates Estelle into C++
Adopted by ITU-T
ISO 9074 (1989).
["The Formal Description Technique Estelle", M.
Diaz et al eds, N-H 1989].