Hello, I find reasonnable the removal of camlp4 from the standard distribution. However, it would be nice to keep a small library to be able to use "ocaml -pp" and still send to OCaml serailized AST within the standard library. This way anyonz can write parser for DSL to OCaml and avoid parsing twice. It should be a library with the the definition of the AST, so it could be rather small? Cheers, Christophe