From Fedora Project Wiki
Objective CAML (OCaml) coverage greatly extended
Fedora 10 contains the OCaml 3.10.2 advanced programming language and a very comprehensive list of packages:
http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora#Package_status
OCaml was available as an update to Fedora 9 but not in the initial release.