- From: Toby A Inkster <tai@g5n.co.uk>
- Date: Wed, 10 Dec 2008 14:43:58 +0000
- To: georgi.kobilarov@gmx.de
- Cc: <dbpedia-discussion@lists.sourceforge.net>, <public-lod@w3.org>, Semantic Web <semantic-web@w3.org>
Georgi Kobilarov wrote: > 1. lengths: > metre, kilometre, centimetre, km^2, etc. > dbpedia:Rhine <http://dbpedia.org/ontology/length> > "1320"^^<http://dbpedia.org/ontology/kilometre> See: http://idi.fundacionctic.org/muo/muo-vocab.html > 2. runtimes > seconds, minutes, hours, days... > dbpedia:Yellow_Submarine_(song) <http://dbpedia.org/ontology/runtime> > "2:38"^^<http://dbpedia.org/ontology/minute> > dbpedia:The_Departed <http://dbpedia.org/ontology/runtime> > "151"^^<http://dbpedia.org/ontology/minute> > > 3. durations > dbpedia:Thirty_Years'_War <http://dbpedia.org/ontology/date> > "1618-1648"^^??? In terms of ISO 8601, "durations" are defined as abstract floating lengths of time, such as "three and a half minutes". When you fix the duration to a particular time, such as "three and a half minutes, starting now", then it is classed as an "interval". For durations, there is there is xsd:duration. e.g. dbpedia:Yellow_Submarine_(song) ont:runtime "PT2M38S"^^xsd:duration . For intervals, XSD doesn't offer a datatype, but ISO 8601 at least offers a machine readable standard syntax for them - intervals are written, slash-separated, as a start-time/end-time pair, a start-time/ duration pair, or a duration/end-time pair. Personally, I tend to represent this in RDF as: dbpedia:Thirty_Years'_War ont:date "1618/1648"^^<urn:iso:std:iso:8601#timeInterval> . -- Toby A Inkster <mailto:mail@tobyinkster.co.uk> <http://tobyinkster.co.uk>
Received on Wednesday, 10 December 2008 14:44:41 UTC