Today we call these little languages Domain
Speci?¬?c Languages.
Domain Speci?¬?c Language engineering is increasingly recognized as an important
productivity technique which increases businesses??™ agility in the design, development
and con?¬?guration of their products. DSLs provide a means for narrowing the communication
gap between users and developers. They allow requirements and speci-
?¬?cations to be made more tangible to users and developers. Finally, they document
critical portions of the knowledge associated with an application or product thereby
reducing the life cycle costs in evolving that application.
Juha-Pekka Tolvanen and Steven Kelly are pioneers in the world of DSLs. These
experts have worked for over a decade in the design of DSLs and the implementation
of commercial DSL tooling at MetaCase. Their popular tutorials and workshops have
been featured at major conferences all over the world. Juha-Pekka and Steven have
worked closely with customers to implement DSLs speci?¬?c to their needs. Few in our
industry have their breadth of knowledge and experience.
When I ?¬?rst encountered their work I assumed from the name MetaCase and the
demonstrations that it was a very clever constraint drawing framework which could be
xi
used to build visual modeling tools. Their frameworks and tools made it easy to
express a custom visual notation allowing one to have a full-blown visual modeling
tool in weeks rather than years.
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