@pernia @meeper the first really good declarative typesetting language made next to the (far inferior imho) sgml, the main imprint it had was in influencing leslie lamport to make latex as a kind of ghetto scribe on top of tex, and in the time bomb functionality it implemented along with the subsequent commercialization efforts of it by the author (brian reid) being one of the main formative influences on richard stallman to start the gnu project and the free software movement as we know it