Extending SDL with a Procedural Data Concept

Specification and description language (SDL) is an object-oriented, formal language defined by The International Telecommunications Union– Telecommunications Standardization Sector (ITU–T) (formerly Comité Consultatif International Telegraphique et Telephonique [CCITT]) as recommendation Z.100. The language is intended for the specification of complex, event-driven, real-time, and interactive applications involving many concurrent activities that communicate using discrete signals.