Main Page | See live article | Alphabetical index Specification and Design Language is usually known by its abbreviation SDL (but not to be confused with the Simple DirectMedia Layer). It is defined by the ITU-T (recommendation Z100) to provide a tool for unambiguous specification and description of the behaviour of telecommunications systems. The area of application also includes process control and real-time applications. SDL provides a Graphic Representation (SDL/GR) and a textual Phrase Representation (SDL/PR), which are equivalent representations of the same semantics. A system is specified as a set of interconnected abstract machines which are extensions of the Finite State Machine (FSM). SDL is formally complete, so it can be used for code generation for either simulation or final targets. Based on a FOLDOC article. Vendors Telelogic [1] make Tau, and SDL Design Tool This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.