Hello, From the arcticle 'OCaml, the ultimate refactoring tool' [1] written by Yaron Minsky, he writes : "So, I replaced this ad-hoc component system with a plug-in architecture where every component registered itself in a uniform way, with a flexible, type-safe way for the components to communicate." I am curious to know how you would build such a component system ? I have tried to use dynlink library but found it difficult to deal with because of dependencies. I have ended up using cppo as a macroprocessor and ship various versions of my binary. Cheers, RĂ©mi [1] http://ocaml.janestcapital.com/?q=node/101