Time Zone Data File Conventions
Waldo (Wally) Wedel [Sun Professional Services JDC]
wally.wedel at Central.Sun.COM
Wed Oct 15 20:51:57 UTC 1997
I am just finishing up implementing some general time zone classes in Java. I parse
your data files and build time zone classes from them. Consequently, I have a few
1) You use the concepts of "wall clock", "standard", and "GMT" time in specifying
transition times. I'd like to verify just what these mean.
a) Does "wall clock" mean simply take the time as given applying no corrections?
b) Does "standard" mean apply DST time shift to given time to find true time?
c) Does "GMT" mean apply GMT offset to given time to get true time?
2) Is the convention for rule naming that when searching for the applicable rule, one
looks for a rule with the specified name covering the specified date? I assume that
failure to find a rule implies no time shift.
3) The comments in the data files contain quite important information about the
actual coded information. Have you considered converting them to HTML to get them
better tagged? I'm particularly interested in tagging some kind of a long name usable
in reports and like. I've been trying to figure out how to preserve them in an OODB
so that they are properly associated with the data they describe.
Thanks for any help you can provide.
Wally Wedel Wally.Wedel at sun.com
SunService Division (303) 804-3073
Java Design Center Fax: (303) 290-1696
5251 S DTC Parkway
Englewood, CO 80111-2700
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