A New DSL Textbook in Town!

DSLs are the ultimate abstraction in software engineering. While programming languages have --- since the advent of computers --- continuously increased their level of abstraction, they are still limited to the domain of computing, with their instances containing many technicalities. Unlike programming languages, DSLs reflect a given application domain, ideally abstracting away anything beyond it. Recognizing their strengths, the programming-language and the software engineering community introduced many technologies for engineering DSLs. While well-polished widely-used DSLs have existed for a long time (e.g., SQL, regular expressions, HTML), language engineering technologies have made great progress over the last two decades, allowing developers who are not language or compiler experts to create their own DSL --- in order to increase the level of automation for their projects.