- From: Thomas Bandholtz <thomas.bandholtz@innoq.com>
- Date: Sun, 05 Jun 2011 08:37:07 +0200
- To: public-lod@w3.org
Am 04.06.2011 17:35, schrieb Pat Hayes: > Far as I can see, one could simply delete every range-string triple. Nothing would break in the RDFS by doing this, and AFIKS nothing is gained from having these range assertions. Deleting every range assertion would not express what they want to say: "many properties have 'expected types'. This means that the value of the property can itself be an embedded item ... But this is not a requirement—it's fine to include just regular text or a URL." [1] They do not expect just anything, but a certain type or a literal (denoting an "informal" instance of this type). Sounds like schema:someProperty rdfs:range [ owl:unionOf (schema:Thing rdfs:Literal ) ]; What funny kind of OWL flavor or profile might this be? Note that they do not use owl:ObjectProperty nor owl:DatatypeProperty but simply rdf:Property, so it might be just fine. Good old RDFS! Some comments from the OWL police? Thomas [1] http://schema.org/docs/gs.html#schemaorg_expected > Pat > > On Jun 4, 2011, at 4:39 AM, Hugh Glaser wrote: > >> Sure does rock. >> As you know, I never venture into ontology definition, to avoid displaying my ignorance, but now and then... :-) >> Suggestion: >> >> The RDFS will (I think!) perpetuate the classic problem (being a natural translation), in that there are lots of range strings. >> For example: >> schema:currenciesAccepted a rdf:Property; >> rdfs:label "Currencies Accepted"@en; >> rdfs:comment "The currency accepted (in ISO 4217 currency format)."@en; >> rdfs:domain schema:LocalBusiness; >> rdfs:range xsd:string; >> rdfs:isDefinedBy <http://schema.org/currenciesAccepted>; >> . >> and >> schema:headline a rdf:Property; >> rdfs:label "Headline"@en; >> rdfs:comment "Headline of the article"@en; >> rdfs:domain schema:CreativeWork; >> rdfs:range xsd:string; >> rdfs:isDefinedBy <http://schema.org/headline>; >> . >> And even productID >> >> I count 53 "rdfs:range xsd:string" and 8 "rdfs:range [ owl:unionOf (xsd:decimal xsd:string) ]" of this kind. >> >> As I say, I think that means that to conform, I can't have a Resource as Range. >> So it is institutionalising a Bad Thing, simply because schema.org says that, for example, "productID" is "text". >> >> Of course, people who use http://schema.rdfs.org/ probably will use Resources for places, currencies, etc, (as they should) so maybe the RDFS needs to reflect this? >> >> Won't try and suggest... >> >> Best >> Hugh >> >> On 3 Jun 2011, at 22:06, Michael Hausenblas wrote: >> >>> http://schema.rdfs.org >>> >>> ... is now available - we're sorry for the delay ;) >>> >>> Cheers, >>> Michael >>> -- >>> Dr. Michael Hausenblas, Research Fellow >>> LiDRC - Linked Data Research Centre >>> DERI - Digital Enterprise Research Institute >>> NUIG - National University of Ireland, Galway >>> Ireland, Europe >>> Tel. +353 91 495730 >>> http://linkeddata.deri.ie/ >>> http://sw-app.org/about.html >>> >>> >> -- >> Hugh Glaser, >> Intelligence, Agents, Multimedia >> School of Electronics and Computer Science, >> University of Southampton, >> Southampton SO17 1BJ >> Work: +44 23 8059 3670, Fax: +44 23 8059 3045 >> Mobile: +44 75 9533 4155 , Home: +44 23 8061 5652 >> http://www.ecs.soton.ac.uk/~hg/ >> >> >> >> > ------------------------------------------------------------ > IHMC (850)434 8903 or (650)494 3973 > 40 South Alcaniz St. (850)202 4416 office > Pensacola (850)202 4440 fax > FL 32502 (850)291 0667 mobile > phayesAT-SIGNihmc.us http://www.ihmc.us/users/phayes > > > > > > -- Thomas Bandholtz Principal Consultant innoQ Deutschland GmbH Halskestr. 17 D-40880 Ratingen, Germany Mail: thomas.bandholtz@innoq.com Mobile: +49 178 4049387 Phone: +49 228 9288490 Fax: +49 228 9288491 http://www.innoq.com/de/themen/linked-data
Received on Sunday, 5 June 2011 06:37:38 UTC