- From: Wei Xing <xing@ucy.ac.cy>
- Date: Tue, 21 Dec 2004 11:34:54 +0200
- To: Charles McCathieNevile <charles@w3.org>, Danny Ayers <danny.ayers@gmail.com>
- CC: www-rdf-interest@w3.org
Dear Danny & Charles, Many thanks for your comments and the links. Both N-ary Relations and EARL are very interesting and very helpful. Best regard Wei Xing Charles McCathieNevile wrote: >Wei Xing, > >I think your way is OK (again, a quick response). This problem was faced in >developing EARL [1], which essentially describes whether a resource conforms >to a requirement. In most of the use cases, the thing that was being assessed >could change. So the conformance would change over time. > >For some time it had a similar approach, to yours. More recently the >structure changed, so that there were Assertions, which had various >properties including the result of the test (the conformance statement >itself) and the time it was done. > >Comparing results then involves checking that the result you mean is relevant >at the time you are talking about (normally, that it is the most recent). One >of the things that EARL does not use at the moment is a datatype for dates >(when the last draft was written datatypes were not part of RDF) but this >should be used, in my opinion. > > >As Danny says, the draft note about n-ary relations covers this case among >others. > >cheers > >Chaals > >[1] http://www.w3.org/TR/EARL10 (yes, the schema doesn't validate - tehre are >some typos in it. You might find that >http://www.w3.org/2001/sw/Europe/talks/200311-earl/all explains it in >simpler form for someone who can read RDF). > >On Mon, 20 Dec 2004, Danny Ayers wrote: > > > >>On Mon, 20 Dec 2004 11:43:12 +0200, Wei Xing <xing@ucy.ac.cy> wrote: >> >> >>>Does anybody have the experience of representing time-sensitive >>>resources using RDF/S? In particular, for the time-sensitive properties? >>> >>>I am trying to describe some time-sensitive resources using RDF/S, of >>>which the values (Object) of the properties (Predicate) are changed from >>>time to time, for instance, a computer cluster (the network bandwidth >>>and the free CPUs number of the cluster are dynamical). >>> >>> >[snip] > > >>>Not sure if my way is OK? Is there another way that allows me to >>>describe such property and its value using RDF without conflicting the >>>exsiting RDF recommendation? >>> >>>I appreciate any comments and suggestions on it. >>> >>> >>(Sorry, very quick response) Your basic modelling approach (the >>4-tuple) looks ok, but I'm not sure about the representation in RDF >>(/XML). This may be helpful: >> >>http://www.w3.org/TR/swbp-n-aryRelations/ >> >>Cheers, >>Danny. >> >>-- >> >>http://dannyayers.com >> >> >> > >Charles McCathieNevile http://www.w3.org/People/Charles >tel: +61 409 134 136 fax(france): +33 4 92 38 78 22 >Post: 21 Mitchell street, FOOTSCRAY Vic 3011, Australia or > W3C, 2004 Route des Lucioles, 06902 Sophia Antipolis Cedex, France > > -- ============================================================ Wei Xing, M.Sc. Research Associate Tel: 00357-22892663 Dept. of Computer Science Fax: 00357-22892701 University of Cyprus email: xing@ucy.ac.cy PO Box 20537 CY1678, Nicosia, CYPRUS
Received on Tuesday, 21 December 2004 09:38:07 UTC