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Re: XML Schema and Timezones

• To: xml-dev@l...
• Subject: Re: XML Schema and Timezones
• From: s.livingstone@b...
• Date: Mon, 24 Dec 2001 04:44:21 +0000 (GMT)

Thanks Chris - 

Yes, but the actual time represented by the UTC time 14:00Z changes in the UK (for example) in winter relative to summer, as there is a 1 hour DST.

So if you were to Schedule all calanders based on 14:00Z then this would imply a different schedule time in the summer (13:00 PM) in the UK than in the winter (14:00 PM)

There is no indicator of this and so your scheduling has the possiblity of being out an hour in different timezones.

So, from your example,

"2001-12-23T18:48-08:00 or 2001-12-24T04:48 02:00, both of which are equivalent to 2001-12-24T02:48Z."

This is ok in the States (as it seems to hgave a constant differetial between the standard time and UTC), but other zones also change yearly for DST.

Hence, although 2001-12-23T18:48-08:00 or 2001-12-24T04:48 02:00, both of which are equivalent to 2001-12-24T02:48Z may be true in the summer, in the winter the second timezone (including 1 hour DST) could well be 2001-12-24T04:48 01:00 and so an hour is lost (due to DST).

Steven

----- Original Message ----- 
From: "Christopher R. Maden" <crism@m...>
To: <xml-dev@l...>
Sent: Sunday, December 23, 2001 11:49 PM
Subject: Re:  XML Schema and Timezones


> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> At 18:27 23-12-2001, s.livingstone@b... wrote:
> >There needs to be some way of stating the target timezone so that the
> >correct Daylight settings relative to UTC can be resolved. Something like
> >this...
> >
> >"CCYY:MM:DDTHH:MM:SSZGXXXX"
> 
> ISO 8601 date-times have time zone information.  The Z indicates UTC.  To 
> use a dateTime with a different time zone, use a format like 
> 2001-12-23T18:48-08:00 or 2001-12-24T04:48 02:00, both of which are 
> equivalent to 2001-12-24T02:48Z.
> 
> HTH,
> Chris
> - -- 
> Christopher R. Maden, Principal Consultant, HMM Consulting Int'l, Inc.
> DTDs/schemas - conversion - ebooks - publishing - Web - B2B - training
> <URL: http://www.hmmci.com/ > <URL: http://crism.maden.org/consulting/ >
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> 
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