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Specification and Design Language.
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).
1. System Software Development Language. System software for
the B1700. "System Software Development Language Reference
Manual", 1081346, Burroughs Corp (Dec 1974).
2. Specification and Description Language. ITU-T.
Specification language with both graphical and character-based
syntaxes for defining interacting extended finite state
machines. Used to specify discrete interactive systems such
as industrial process control, traffic control, and
telecommunication systems. Proc Plenary Assembly, Melbourne
14-1988-11-25, Fasc X.1, CCITT. "Telecommunications Systems
Engineering Using SDL", R. Saracco et al, N-H 1989. Available
from Verilog, MD. (See XDL).
3. Shared Dataspace Language. "A Shared Dataspace Language
Supporting Large-Scale Concurrency", G. Roman et al, Proc 8th
Intl Conf Distrib Comp Sys, IEEE 1988, pp.265-272.
4. Structure Definition Language. Used internally by DEC to
define and generate the symbols used for VAX/VMS internal data
structures in various languages.