Question on id stability

Jonathan Lennox lennox at
Tue Jan 4 00:54:37 UTC 2005

On Monday, January 3 2005, "Paul Eggert" wrote to "Mark Davis, Tz (tz at" saying:

> "Mark Davis" <mark.davis at> writes:
> > I'm inclined to recommend that we maintain stability as of a given
> > date; that we never change an ID after that point.
> >
> > 1. Would there be any downside to such a policy?
> Only if somebody builds the database without the "backwards" file,
> which lists the backwards-compatibility names.  The default is to
> include "backwards", as it includes very common IDs like US/Pacific.
> I'd be surprised (but not astonished) if someone omitted it.

I wonder if it would be a good idea to separate the old-style names
(US/Eastern, etc.) from compatibility versions of old Area/Location names.
It seems like FreeBSD and similar systems would in general want to have the
latter even if not the former.

Jonathan Lennox
lennox at cs dot columbia dot edu

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