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RE: [Ietf-calsify] Re: Google Speculation, but interesting

From: Libby Miller <Libby.Miller@bristol.ac.uk>
Date: Sun, 27 Feb 2005 14:47:47 +0000 (GMT)
To: Cyrus Daboo <daboo@isamet.com>
cc: Cameron Stillion <camerost@exchange.microsoft.com>, pregen@egenconsulting.com, Robert_Ransdell@notesdev.ibm.com, Calsify <ietf-calsify@osafoundation.org>, www-rdf-calendar@w3.org
Message-ID: <Pine.GSO.4.61.0502271442490.12774@mail.ilrt.bris.ac.uk>

On Sun, 27 Feb 2005, Cyrus Daboo wrote:

> Hi Cameron,
> --On February 26, 2005 11:18:05 PM -0800 Cameron Stillion 
> <camerost@exchange.microsoft.com> wrote:
>> The behavior I have seen in the latest Apple iCal (the product) with
>> regard to timezones is that they are NOT defined in VTIMEZONE blocks,
>> but are named in VEVENTS.  The names seem to match the OSX naming
>> comventions for Time Zones, and notably do not match the Windows names.
>> Since they aren't formally defined, it's difficult to map them.  We are
>> forced to have an internal list of Apple names for the sole purpose of
>> interoping.  (grumble grumble)
> Right - I just did a test and indeed if you create a new calendar and add a 
> single event with a timezone, it does not include the VTIMEZONE in the ics 
> file it creates in its own calendar store. However, if you 'Export' the 
> calendar from the iCal.app, then it does include a VTIMEZONE. The VTIMEZONE 
> appears to be correct, but contains only the minimum amount of information to 
> cover the time for the event. Arguably this is not a bug as it is free to do 
> whatever it wants in its own calendar store.
> WRT naming of timezones on different OS's - hopefully with a standardised 
> timezone registry we can solve that issue and also remove the need to always 
> send the VTIMEZONE data by value (as opposed to by reference to the registry 
> entry).

Is it worth using the iCalendar urls for timezones on the W3C site 
as a registry like that?[1] W3C has a policy for url longevity[2]. At 
the moment the timezones are maintained as RDF, but that's a 
transliteration of iCalendar into XML/RDF and could perhaps in any case 
have iCalendar versions added. The urls for timezones are part of 
experiments in turning icalendar into RDF[3].


[1] http://www.w3.org/2002/12/cal/tzd/
[2] http://www.w3.org/Consortium/Persistence
[3] http://www.w3.org/2002/12/cal/

> -- 
> Cyrus Daboo
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Received on Sunday, 27 February 2005 14:48:40 UTC

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