[jira] [Created] (DAFFODIL-2823) time zone "z" specifier does not work

["Mike Beckerle (Jira)" <ji...@apache.org>]

Mike Beckerle created DAFFODIL-2823:
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             Summary: time zone "z" specifier does not work
                 Key: DAFFODIL-2823
                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2823
             Project: Daffodil
          Issue Type: Bug
          Components: Back End
    Affects Versions: 3.4.0
            Reporter: Mike Beckerle


The time zone string  "EST" is parsed by calendarPattern charater "z", and becomes ISO standard "-05:00" on parse, but "GMT-5" on unparse.

This happens despite dfdl:calendarLanguge="en_US". That is, the problem is that the unparse should produce "EST", but does not. 

The locale is needed to implement "z" time zone format because some of these 3-letter timezone specifiers are ambiguous, so the locale must be known to disambiguate them when parsing. 

For example CST can be "Central Standard Time" (North America), "Cuba Standard Time" or "China Standard Time", and is widely used for "Central Standard Time" (Australia) according to [https://en.wikipedia.org/wiki/List_of_time_zone_abbreviations]

So when parsing "z" one must use the locale. When unparsing it's not so ambiguous, but Daffodil doesn't appear to use the locale information.

Per the ICU documentation here:  [https://icu.unicode.org/design/formatting/timezone/icu-4-8-time-zone-names]

The "z" needs locale information, and several of the other specifiers also need it. 

 

 



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