Maybe i'm a fundamentalist, but for me an internal DSL is more than what you describe. It is, for example, a syntax transformer (à la Racket) which is a new "ke

Maybe i'm a fundamentalist, but for me an internal DSL is more than what you describe. It is, for example, a syntax transformer (à la Racket) which is a new "keyword"-like thing. Valid in the host language, yes, but perhaps doing arbitrarily complex compilation-like steps before the final execution phase. IANAQCSY, though.