- From: Hans Teijgeler <hans.teijgeler@quicknet.nl>
- Date: Sat, 16 Sep 2006 16:00:00 +0200
- To: "'C Haley'" <cands589@yahoo.co.uk>, <public-owl-dev@w3.org>
- Message-ID: <005501c6d998$69f1aba0$0202a8c0@hans>
Hi Chris, We use templates that are in essence N-ary Relations [1]. We define template classes with the applicable property Restrictions, and then instantiate these whenever required. In your case the template instance for "Peter hosted a meeting in the office yesterday" would look like: <Activity rdf:ID="FACT-98232479"> <ex:participant rdf:resource="#Peter-20060916"/> <ex:participantType rdf:resource="#host"/> <ex:activity rdf:resource="ACT-32874334"/> <ex:activityType rdf:resource="#meeting"/> <ex:activityLocation rdf:resource="#ourOffice"/> </Activity> Mind you, this is a rough first cut. We define, separately, a "temporal part" of Peter, that in fact has a beginning and an ending. Aka of 4th dimension as referred to by Henry Story [2]. The meeting is, here, a "temporal whole", because we assume that Peter did host the entire meeting. If he would have hosted only a (temporal) part of the meeting, we would create a temporal part of that meeting for that reason. If he would have hosted only certain parts of the meeting (points on the agenda) we would have created a subactivity for that reason. More on this you can find on our site [3] Regards, Hans PS This is clearly OWL-Full :-) ____________________ OntoConsult Hans Teijgeler ISO 15926 specialist Netherlands +31-72-509 2005 HYPERLINK "http://www.infowebml.ws/"www.InfowebML.ws HYPERLINK "mailto:hans.teijgeler@quicknet.nl"hans.teijgeler@quicknet.nl [1] HYPERLINK "http://www.w3.org/TR/2004/WD-swbp-n-aryRelations-20040721/"http://www.w3.or g/TR/2004/WD-swbp-n-aryRelations-20040721/ [2] HYPERLINK "http://www.tenthdimension.com/flash2.php"http://www.tenthdimension.com/flas h2.php [3] HYPERLINK "http://www.infowebml.ws/description/ontology-for-templates/ontology-for-tem plates.htm"http://www.infowebml.ws/description/ontology-for-templates/ontolo gy-for-templates.htm _____ From: C Haley [mailto:cands589@yahoo.co.uk] Sent: Monday, September 11, 2006 20:23 To: public-owl-dev@w3.org Subject: Hi I’ve been reading through the various OWL documents and from what I’ve seen it appears that OWL is very good at representing state information, either of classes or individuals, but does not seem to allow for representing non-state relationships. For example I can use OWL to represent the concept ‘man’ as a class, represent Peter as an instance of that class, and I can define a property stateOfHealth, and the concept ill, and create a triple to say stateOfHealth(Peter, ill). This is representing a fact which defines the state of an instance. But suppose I want to represent the fact that Peter hosted a meeting in the office yesterday. Even if I created an artificial property ‘toHost’ and a blank node as an instance of the concept ‘meeting’, there is no way to attach the time and location to the property. Also I would want this property to derive from a URI representing the concept of ‘hosting a meeting’, but the OWL syntax seems to require properties to derive from other properties, not from a generic URI. So clearly this is not the correct way to represent an action. Can anyone tell me if there are any recommendations or documents describing the preferred solution to this problem? Alternatively is this an area where the existing OWL syntax/vocabulary is likely to be extended - is anyone actively working on this issue at present? Are there any draft recommendations in circulation? Many thanks for any comments anyone can give. Chris _____ Win a BlackBerry device from O2 with Yahoo!. HYPERLINK "http://us.rd.yahoo.com/mail/uk/taglines/default/mobile_o2/*http://www.yahoo .co.uk/blackberry"Enter now. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.0.405 / Virus Database: 268.12.3/447 - Release Date: 13-Sep-06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.0.405 / Virus Database: 268.12.4/449 - Release Date: 15-Sep-06
Received on Saturday, 16 September 2006 14:02:07 UTC