View source for RdfCalendar

__NOTOC__
Among [[SeedApplications]], calendaring has achieved a certain critical mass of attention because

* we want to rescue ourselves from the [[PersonalInformationDisaster]] of manually copying and pasting information from web pages to calendar apps and PDAs.
* [[CalendarUserAgents]] provide an agreeable user interface to iCalendar data.
* it grounds lots of issues in practice: [[ThingsVersusTheirNames]], [[InterpretationProperties]], [[RdfCalendarTimeZoneNotes]]

The history of this topic is connected to a series of [[RdfCalendarMeetings]]. An [[RdfCalendarPresentation]] aims
to tell the story so far.

In addition to basic tools like [[IcalToRdf]], we're working toward various goals and use cases, including:

* [[EventDiscovery]]
* [[CalendarScraping]]
** [[TravelTools]], [[PathCross]]
** [[CalendarSynchronization]]
** [[ScheduleAnimation]]
** [[OpeningHoursUseCase]]
** [[AnnounceOMatic]]
** HTML views of calendars (see datebook2html.xsl in [http://dev.w3.org/cvsweb/2001/palmagent/ telagent] for example)

== Documentation ==

The primary sources of information are the [http://www.w3.org/2002/12/cal webpage], the [http://www.w3.org/2002/12/cal/ical schema] and the [http://lists.w3.org/Archives/Public/www-rdf-calendar/ mailing list], and to a certain extent [http://www.ietf.org/rfc/rfc2445.txt the iCalendar RFC 2445]. [[RdfCalendarDocumentation]] is an attempt to summarize the decisions we've made.

=== running the test cases ===

I (chaals) ran the test cases, and then added a new one. While we work on figuring out how to solve it, here's what I did and needed [http://rdfig.xmlhack.com/2004/02/02/2004-02-02.html#1075731668.565597 DanC helped me through all this in IRC]:

I have Mac os X version 10.3 with Xcode (developer sort of environment out of the box). I checked out the calender space: 2002/12/cal (I don't know how to describe doing CVS checkout - I have set the parameters, so it just happens. There is an example at the start of [[RdfCalendarSchema]] and there are lots of CVS programs around), and cwm - 2000/10/swap from W3C.

I then had to install the perl modules Jcode and SHA. I did this using a program that let me say "install Jcode" and did everything for me, but if you know perl you might know other ways of doing this. I think fink or debian's apt-get can do this sort of stuff for you.


<pre><nowiki>
> cd 2000/12/cal
2000/12/cal > make retest
</nowiki></pre>


... and lots of good stuff came out ...

so then I added a test case, by putting an [[RdfCalendarSchema]] file into 2000/12/cal/test and editing 2000/12/cal/test/cal-regression.n3 (on the basis of monkey-see, monkey-do) to add a new test at the end of the list. The file I made came from running ical2rdf.pl on something that Apple's iCal produced. And that, sadly, is the end of the good news - I checked in the test, but so far it doesn't succeed. So that's what I am doing now. (The iCal file is [http://www.w3.org/2002/12/cal/test/Todos1.ics Todos1] if you're curious. It has Todo items in it that don't do a nice round trip.

--

Hmm... [[[WikiNames|vs. Normal Titles]]]... this topic isn't really
a pattern... (though [[ScalableCalendaringAndScheduling]] is
a pattern DanC has noddlned on quite a bit) might as well call it [[RDF Calendar Taskforce]]?
Hmm... this page isn't the task force; it's a page about
the task force (meta-hmm: that's not quite [[ThingsVersusTheirNames]],
but it's close... perhaps [[SubjectIndicator]]). It isn't the only one. Though it could
be the main one, by consensus of the task force itself
(which doesn't have a clear decision-making process.)

--

--

Cool: ''datetime - a fast, compact implementation in C of date and time calculations ranging from the year 1 to 9999, with optional timezone support; written by Tim Peters.'' -- [http://www.python.org/2.3/highlights.html what's new in python 2.3]. These [http://www.w3.org/2002/12/cal/tzrules.n3 rules for easter] only work back to 1970 because cwm's <code><nowiki>dayOfWeek</nowiki></code> function throws an exception if you go back before 1970. Hmm... [[CwmTips]]

== Related Work ==

See DAML-Time [http://www.cs.rochester.edu/~ferguson/daml/ web site]
and [http://www.daml.org/listarchive/daml-time/ mailing list archives]; in particular,
the [http://www.ai.sri.com/daml/ontologies/time/Time.daml part of the time ontology that is naturally expressed in DAML+OIL].  This
effort is led by Jerry Hobbs, who is probably the world's expert on time ontologies.
Seems somewhat similar to [http://www.cyc.com/cyc-2-1/vocab/time-vocab.html the cyc time vocabulary],
though I think the latter is less constraining; i.e. people are <code><nowiki>cyc:[[TemporalThing]]</nowiki></code>s
but not time instants.

== Bookmarks ==

from the [[WikiMarklet]] etc.

Feel free to keep notes here, though don't forget to keep the
[http://lists.w3.org/Archives/Public/www-rdf-calendar/ www-rdf-calendar mailing list] informed of interesting milestones and announcements.

* [http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0010.html Calendar sharing and synchronization] [[DanConnolly]] Nov 09 1999
* [http://laughingmeme.org/archives/000329.html#000329 calendar store brain dump] [[DanBri]] stumbled across 05 Feb 2003.
* [http://www.visualtron.com SMS Server] information site.
* [http://tipi.sf.net/doc/recur/ Recurrence tutorial] by Martijn van Beers, work in progress
* the [http://twistedmatrix.com/users/jh.twistd/moin/moin.cgi/MonthCalendar 'month calendar'] plugin for moin moin Wiki.
* [http://wiki.osafoundation.org/bin/view/Main/AlternativesInHigherEd Review of Current Leading Email Client and Calendaring Applications used in Higher Education] on the Chandler Wiki. 
* [http://www.cs.washington.edu/research/semweb/email.html Semantic Email], [http://www.cs.washington.edu/research/semweb/coord.html Semantic Email -- Coordination Process]
* A [http://sw1.ilrt.org/discovery/2003/11/rdfical/final.html paper describing the process is available (submitted to WWW2004)]

[http://www.macmerc.com/articles/Freeloader_Friday_Download_of_the_Week/235 MacMerc.com: Beyond iCal -- calendar upload/sharing tools]

[http://nationalatlas.gov/timeznm.html Time Zones of the United States]

[http://jp-icalendar.sourceforge.net/ jpilot-icalendar]

[http://www.xmpp.org/ietf-logs/calsify@ietf.xmpp.org/2005-03-10.html calsify BOF at IETF 62, text chat logs]

[http://www.isi.edu/~pan/timezonehomepage.html Time Zone Resource in OWL]

* [http://www.usatoday.com/news/nation/2005-04-25-indiana-time_x.htm In Indiana it's a matter of Time] By Dennis Cauchon, USA TODAY; [[DanConnolly]] read on Apr DCA rules workshop trip that US Department of Transportation determines time zones.