Real Time Developer Studio

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Real Time Developer Studio
Developer(s) PragmaDev
Stable release 4.6
Operating system Linux, Windows, Solaris, OS X
Type Software development
License Proprietary

Real Time Developer Studio, usually called RTDS, is a tool introduced by PragmaDev in 2002. Its primary objective was to support SDL-RT modeling technology, a mix of the standard SDL from ITU-T and C language.


Specification and Description Language[edit]

The Specification and Description Language -SDL- is a modeling language standardized by ITU-T to describe communicating systems. SDL is graphical but contains an action language with a semantic of execution making the SDL models executable. SDL is considered formal because it is complete and non ambiguous. SDL-RT is a variant of SDL where the action language is replaced by C or C++ instructions. SDL-RT is considered semi-formal because the mix of SDL and code. ITU-T has standardized a UML profile based on SDL making by extension any SDL tool a sort of UML tool.


Real Time Developer Studio embeds an SDL simulator that behaves like a model debugger. It is possible to set breakpoints graphically, to view variables, and pending timers. During execution a live trace is generated based on the Message Sequence Chart ITU-T standard.

Code generation[edit]

Real Time Developer Studio can generate C or C++ out of an SDL model. The generated can be adapted to any Real Time Operating System or scheduler. The tool offers a number of integrations with debuggers such as gdb so that the user feels he is still debugging the model, not the generated code.

Model checking[edit]

Real Time Developer Studio can export the SDL model to different formats such as IF, FIACRE, or XLIA in order to verify the model in third party tools such as IFx from Verimag, TINA from LAAS, or Diversity from CEA LIST.


Real Time Developer Studio support TTCN-3 international standard for testing. The tool can simulate the test case against the SDL model, or testing code can be generated to run against a real SUT (System Under Test).

Model Based Testing[edit]

  • Real Time Developer Studio can generate TTCN-3 test cases out of Message Sequence Charts resulting from a simulation.
  • Test cases can also be generated out of the SDL model through a third party technology such as IFx from Verimag or Diversity from CEA LIST. For that purpose Real Time Developer Studio exports the model to a pivot language that is understood by the third party tool.

Real Time Developer Studio history[edit]

Release year Version Summary
2002 1.x SDL-RT support with code generation for VxWorks and debug with Tornado.
2003 2.x UML support.
2004 3.x SDL support including simulation.
2009 4.x TTCN-3 support for testing.


The creator of RTDS is the private company PragmaDev. PragmaDev was founded in 2001, and is located in Paris, France.[1]


  1. ^ "PragmaDev. Profile.". Retrieved 2014-03-30. PragmaDev is [a] provider of graphical software modelling tools based on SDL... 

Further reading[edit]

  • Gaudin, E.; Deltour, J.; Faivre, A.; Lapitre, A., "Model-Based Testing: An Approach with SDL/RTDS and DIVERSITY" in SAM 2014 proceedings,Eds. Amyot, Daniel, Fonseca i Casas, Pau, Mussbacher, Gunter, Springer LNCS 8769, September 2014.
  • Kuhn, T.; Gotzhein, R.; Webel, C., "Model-Driven Development with SDL – Process, Tools, and Experiences" in Model Driven Engineering Languages and Systems, Eds. Nierstrasz, Oscar; Whittle, Jon; Harel, David; Reggio, Gianna, Springer LNCS 4199, October 2006.
  • Hassine, M.B.; Grati, K.; Ghazel, A.; Kouki, A., "Design and Implementation of AIS Link Layer Using SDL-RT," Systems Conference, 2008 2nd Annual IEEE, vol., no., pp.1,5, 7-10 April 2008.
  • Serge Haddad; Fabrice Kordon; Laurent Pautet; Laure Petrucci, "Distributed Systems: Design and Algorithms", Wiley and Sons Inc. 2011.
  • CASE 2011 Simposio Argentino de Sistemas Embedidos.

External links[edit]