[tz] [PATCH 2/3] Replace some zones with links when that doesn't lose non-LMT info.
mhochschild at gmx.de
Tue Sep 3 19:55:22 UTC 2013
*Paul Eggert* eggert at cs.ucla.edu
/Tue Sep 3 17:05:49 UTC 2013/
Lester Caine wrote: >/can we at least agree that the quality of the
material is heading in the right direction? / Yes, that's the idea.
While I personally have no problem with tidy-up of obviously wrong data
and also agree that correction of mistakes is more important than
stability (which has never been absolutely pretended), I think end-users
of tzdb should get a better opportunity to estimate how reliable the
data are and how much trust they can put in their time zone calculations.
Offsets in LMT-lines can easily be qualified as UNKNOWN. For the
proposed date of 1970 as general separation point between UNSAFE and
(apparently) RELIABLE I am not so sure. Would it not be helpful for
end-users if there is an additional year-type attribute per zone which
tells the users since when the data can be confirmed with high
probability of correctness? Would require about 400+ attributes (ok,
1970 as default). I am sure for example in UK or in Germany the data are
correct even a pretty while before 1970. Flexibility would be a good
thing, isn't it? External APIs could support the users with this extra
quality information per offset and make them better aware that
historical tz data are not set in stone.
Just giving a thought...
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