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Favoured RDF schema for schedules?

From: Graham Klyne <GK@NineByNine.org>
Date: Tue, 03 Dec 2002 16:56:16 +0000
Message-Id: <5.1.0.14.2.20021203163025.00a458e0@127.0.0.1>
To: www-rdf-calendar <www-rdf-calendar@w3.org>

All,

I'm looking for an RDF schema to use for weekly schedule description -- to 
capture things like "7:00-9:00PM every Monday to Friday, and 4:00-10:00 
every Saturday and Sunday" -- for originating new data.

I've taken a quick review to remind myself what we discussed at the SWAD-E 
calendaring workshop [4], and the most stable option currently seems to be 
Libby and Michael Arick's schema at [1].  By comparison, DanC's work that I 
find [2] seems to be related to mapping legacy forms rather than aiming for 
a common schema ... hmmm, except the cyc ontology stuff?;  but as described 
there it doesn't deal with repeating schedules like timetables.  Also, DanC 
has created a version of iCalendar [5], but again I don't see any support 
for weekly repeating intervals.

Did anything happen about the new W3C schema that folks were going to set 
up following the calendaring workshop [3]?

I'm planning to try and use [1] unless anyone has any better ideas.

I'm also struggling to understand how iCalendar does repeated intervals as 
opposed to repeated instants:  all the recurrence examples in RFC 2445 [6] 
seem to deal with repeated instances rather than intervals.  To capture the 
example schedule above (7:00-9:00PM every Monday to Friday, and 
4:00-10:00PM every Saturday and Sunday), does something like this work?:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:http://id.ninebynine.org/wip/2002/timetable
BEGIN:VEVENT
DTSTART:20021201T190000
DTEND:20021201T210000
RRULE:FREQ=WEEKLY;BYDAY=MO,TU,WE,TH,FR
END:VEVENT
BEGIN:VEVENT
DTSTART:20021201T160000
DTEND:20021201T220000
RRULE:FREQ=WEEKLY;BYDAY=SA,SU
END:VEVENT
END:VCALENDAR

Any pointers or hints, please?

#g
--

[1] http://www.ilrt.bris.ac.uk/discovery/2001/06/schemas/ical-full/hybrid.rdf

[2] http://www.w3.org/2000/10/swap/pim/travel.html

[3] http://ilrt.org/discovery/chatlogs/rdfig/2002-10-09.html#T15-28-24

[4] http://www.w3.org/2001/sw/Europe/reports/dev_workshop_report_2/

[5] http://www.w3.org/2000/10/swap/pim/ical.rdf

[6] http://www.ietf.org/rfc/rfc2445.txt



-------------------
Graham Klyne
<GK@NineByNine.org>
Received on Tuesday, 3 December 2002 13:02:11 GMT

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