Just looking at the table of contents here http://caml.inria.fr/pub/docs/manual-ocaml/objectexamples.html http://caml.inria.fr/pub/docs/manual-ocaml/objectexam

Just looking at the table of contents here http://caml.inria.fr/pub/docs/manual-ocaml/objectexamples.html http://caml.inria.fr/pub/docs/manual-ocaml/objectexamples.ht... seems to state otherwise. That said, I think the common advice is to not use most of that and to restrict yourself to just records as they are almost always the better choice.