Use of "CS" for 'Serbia and Montenegro'

Bruce Lilly blilly at
Fri Jan 14 23:25:36 CET 2005

>  Date: 2005-01-13 11:06
>  From: "Peter Constable" <petercon at>

> And there has been a historical definition of "CS" meaning
> "Czechoslovakia", and certainly extant copies of ISO 3166 documenting
> that, with enough industry memory to have left a significant amount of
> confusion.

If some user is using software that is based on ancient
definitions and registrations, no new registration will
help.  For developers, again if they are using ancient
definitions, there is no reason to believe that they
will take notice of new registrations (specifically,
that they would take note of a new IANA registration
while ignoring long-standing updates to the ISO 3166
lists).  Regarding confusion, RFC 3066 is clear that the
ISO or its designated MA may make updates.

> If registering something that is in your view self-evident and
> accomplishes nothing, then it is entirely harmless.

Not entirely; it requires some effort on the part of
reviewers (official and unofficial) and of IANA.

> So what I don't 
> understand is why you seem so opposed to such a registration.

If it accomplishes nothing, it's just unnecessary busy-work.
Surely IANA has more important work to do (and as far as I
can tell, a considerable backlog).

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