Amardeo Sarma

Ove Færgemand

Specification and Description Language (SDL) is a well-proven and standardised technology, which continues to evolve and be adapted to meet new challenges. The long term success factor for SDL is its popularity. It fulfils the needs of both the individual end user, who is mainly interested in the available features of SDL and other involved companies, who are also interested in the general market and standards aspects of SDL. Other object-oriented specification tools exist but few span all phases of development from system specification to simulation or code generation as SDL does. Even fewer are maintained as international standards. The primary focus of this publication is to consider the object-oriented extensions of SDL and how they will allow SDL to continue to compete with the development of other object-oriented techniques.

Proceedings of the Sixth SDL Forum, Darmstadt, Germany, 11-15 October 1993

SDL '93, Using Objects

Ana Cavalli

As Cavalli and Sarma astutely remarked in the introduction to this volume, it is quite remarkable that SDL '97 may have the first participant younger than SDL itself. SDL '97 provides the opportunity to reflect the course SDL has taken and why it has been successful over two decades where other languages addressing the same market have failed. SDL now also has a permanent companion in MSC (Message Sequence Charts). MSC today is a language in its own right and has its areas of application both in conjunction with SDL and independently or in combination with other techniques. MSC has strong structuring concepts to specify message sequences for large systems and can be used to develop scenarios, which is extremely useful for test and design environments. The SDL Forum today really is the SDL and MSC Forum.

SDL, MSC and Trends

SDL '97: Time for Testing

R. Braek

Message Sequence Charts (MSC) have had an unanticipated success, both with SDL, on its own and in conjunction with other methods and tools. Major tool vendors now offer both SDL and MSC in their tool set. This timely volume reports on the recent developments in this expanding field. Several papers deal with language issues, tools and methods for effective use of MSC. Advances in "SDL technology" are discussed, and several papers deal with the early stages of product development and how SDL may be complemented by other methods, such as OMT, to improve problem understanding and make better SDL designs. New developments in the areas of tools for verification, validation and testing are also included, together with a large number of papers on applications.

Amardeo Sarma

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