- From: Feng Pan <pan@ISI.EDU>
- Date: Tue, 10 Oct 2006 17:09:20 -0700 (PDT)
- To: Antoni Mylka <Antoni.Mylka@dfki.uni-kl.de>
- cc: public-swbp-wg@w3.org
Hi Antoni, Thank you for your comments. > Many applications use the TZ timezone database > (http://www.twinsun.com/tz/tz-link.htm). Is there a mapping between TZ > timezones and the timezones from the www.w3.org/2006/timezone-world or > www.w3.org/2006/timezone-us? No, currenly there is no mapping between them, but it would be useful to explore that. > The DurationDescription class doesn't support negative durations > (as the XSD duration datatype does). Such negatve durations come up in iCal > files. (That's why using a DurationDescription to represent an ical Duration > would need some additional information if it's negative) Thank you for pointing that out. I think the negative durations are only used for subtractions in temporal arithmetic. For those cases, subtraction rules can be applied to the positive durations. > The timeZoneProperty of the owl-time ontology points to a timezone, not > to a Region. Doesn't it imply loss of information? It would be nice to be > able to attach a DateTimeDescription to a geographical region. It seems when we use time zones for dateTimes, we are most interested in which time zone it is in and how much time offset from GMT/UTC. For example, XSD:dateTime only has the duration offset from UTC for time zones. Thanks, Feng -- Feng Pan, Ph.D. Candidate USC Information Sciences Institute (ISI) Email: pan@isi.edu Web: http://www.isi.edu/~pan/
Received on Wednesday, 11 October 2006 00:10:01 UTC