- From: Danny Ayers <danny.ayers@gmail.com>
- Date: Mon, 2 Apr 2007 12:41:36 +0200
- To: public-swbp-wg@w3.org
My query is primarily about the current status of this doc. I assumed there would be a Note somewhere on part-whole relationships, Google led me to this W3C Editor's Draft 11 Aug 2005 [1]. The status given on the SWBPD page [2] is "Reviewed and ready for note status - requires html cleanup.". Aside from the time lag, there is at least one issue that's slipped through review, see below. Since SKOS has come along it seems likely that may offer another approach to the part-whole problem (anyone have any pointers on this?). The draft includes the following: [[ The code for classes and properties in RDF Schema partOf a rdf:Property . partOf_directly a rdf:Property ; rdfs:subPropertyOf partOf . Car a rdfs:Class . Engine a rdfs:Class . Headlight a rdfs:Class . Wheel a rdfs:Class . As shown, there is not much one can express in RDFS, and as a result it will not be used for the remainder of this note. ]] Aside from that final sentence having an unnecessarily dismissive tone, it's plainly inaccurate - statements about the classes and/or individuals in those classes can be made using properties, as shown in the OWL-oriented examples that follow, e.g. [[ engine123 a Engine ; part:partOf_directly car123 . ]] I realise the draft is aimed at describing the problem in the context of OWL ontologies, but my own requirement which led me to search for this is to initially express part-whole relationships in RDF(S), so I can use SPARQL one the data. I'm not sure at this point in time if I'll want DL inference further down the road, or whether there are OWL-based tools that could potentially be used with the data. For this general reason I personally believe that it's good practice when using RDF(S) to remain consistent with OWL DL unless there are strong reasons not to, but the draft doesn't address this option - it takes a stance of "OWL or nothing". Cheers, Danny. [1] http://www.w3.org/2001/sw/BestPractices/OEP/SimplePartWhole/ [2] http://www.w3.org/2001/sw/BestPractices/OEP/ -- http://dannyayers.com
Received on Monday, 2 April 2007 10:41:40 UTC