]> Why not just prefix each message with a version number. Recipients then need to be able to support just current_version and current_version-1[*] of each message type. Rich. [*] Implying the knowledge to upgrade from this to current_version. -- Richard Jones. http://www.annexia.org/ http://freshmeat.net/users/rwmj Merjis Ltd. http://www.merjis.com/ - all your business data are belong to you. "My karma ran over your dogma" ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners