[tz] Proposed patch - Theory change to reinstate reference to ISO-3166

Tobias Conradi mail.2012 at tobiasconradi.com
Wed Sep 4 17:36:16 UTC 2013

On Wed, Sep 4, 2013 at 7:04 PM, Stephen Colebourne <scolebourne at joda.org> wrote:

> https://github.com/jodastephen/tz/commit/e6199cc2616e938efb9422b263bd09da70220604

> +  Use ISO-3166 as a guide to ensuring time zone name coverage.
> +    There should typically be at least one name per ISO-3166 code.
1) name
The section following "Here are the general rules used for choosing
location names,
in decreasing order of importance:" talks about locations, using
"name" is inconsistent.

2) ISO-3166 code

leads to

There are two standards containing the string ISO 3166-1, the one
published the latest is
ISO 3166-1:2006

The other is
ISO 3166-1:1997

The ISO website also shows
ISO 3166:1981
ISO 3166:1988
ISO 3166:1993

ISO 3166-1:2006 includes three sets of codes.

There is no 1:1:1 correspondence between the sets. Not even 1:1
between any pair of them.

The Wikipedia article says:
"The first edition of ISO 3166 was published in 1974, which included
only alphabetic country codes."

Thus even the cutoff 1970-01-01 marks a time that is before the first
publication of any ISO 3166 standard.

There are at least two pairs, namely DD/DE and YD/YE where there is
not "at least one name per ISO-3166 code" but only one per pair.

When looking at the locations or location names, it follows that
"There should typically be at least one name per ISO-3166 code." was
never applied.

Tobias Conradi
Rheinsberger Str. 18
10115 Berlin


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