On 10/05/18 17:24, Adriano dos Santos Fernandes wrote:
Would that name be the full name like Europe/Amsterdam, or would it
also include the imprecise (duplicates are possible) like CET?
Both, each one has a different ID.
There are multiple abbreviations that relate to different rules. Only
the full name gives the individual rule. This is one of the areas that
Paul has been modifying the use of abbreviations where in many cases TZ
invented them in the first place. The main problem is however simple
things like does your version of ICU include or exclude the 'backzone'
file. TZ is only designed to be complete since 1970 so the use of TZ
offsets and Daylight Saving information prior to 1970 is something of a
lottery! It is another flag that needs to be available so that you know
if the TZ rules supplied can be used with genealogical data for
instance. 'backzone' contains a number of historic abbreviations some of
which were inventions and should be ignored, and others are pre 1970 so
not visible in some instances.
--
Lester Caine - G8HFL
-----------------------------
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