As I have mentioned before, I’ve been working on an (internal) DSL at work to aid with testing. I just finished reading a post by Michael Feathers entitled How to Fail with External DSLs. It’s a good post that brings to light some very real issues regarding the development of external domain specific languages. I laughed to myself when Michael identified one of the pitfalls as being the inability to attract new hires to work on a language that they would not be able use outside of your company, as I turned down a job right out of college for that exact reason.

dsl