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Re: [Rdfapi-php-interest] Double rdf:type gives bug in RAP netapi?
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From: Hans T. <han...@qu...> - 2006-08-23 16:10:06
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Richard, If I am well informed multiple typing, i.e. multiple inheritance, is normal practice in RDF/RDFS/OWL. Would using rdf:about the 2nd to nth time inside a triple store help to solve this problem? Regards, Hans ____________________ OntoConsult Hans Teijgeler ISO 15926 specialist Netherlands +31-72-509 2005 www.InfowebML.ws han...@qu... ---------- Forwarded message ---------- From: Richard Cyganiak <ri...@cy...> Date: Aug 23, 2006 5:00 PM Subject: Re: [Rdfapi-php-interest] Double rdf:type gives bug in RAP netapi? To: Benjamin Nowack <bn...@ap...> Cc: rdfapi-php-interest <rdf...@li...>, Onno Paap <onn...@gm...> You are right Benjamin, and I was wrong. The spec says that the rdf:ID must indeed be unique. Apologies for spreading misinformation ... (The full rule is: The same combination of rdf:ID and xml:base must never occur twice in a document, taking into account that xml:base is inherited to XML child elements.) So it's indeed a RAP bug. Richard On 23 Aug 2006, at 15:46, Benjamin Nowack wrote: > On 23.08.2006 14:27:37, Richard Cyganiak wrote: >> Vowlidator seems to dislike the fact that RAP uses rdf:ID twice with >> the same value. That's allowed by the specs, although admittedly you >> could argue that it's bad style. (And indeed it's just a warning in >> Vowlidator, not an error.) > AFAIK, redundant node rdf:IDs are not allowed in a shared > scope/document. It's similar to the id attribute in html. > It's a bug in both RAP and Vowlidator, the latter should issue an > error, not a warning ;) > > hth, > ben > >> >> So it's not a RAP bug, but it's an indication that Vowlidator is a >> bit too picky :-) >> >> You can safely ignore the warning. >> >> Yours, >> Richard >> >> >> On 23 Aug 2006, at 13:28, Onno Paap wrote: >> >>> Dear rdfapi-php team, >>> The following examples are snippets from much larger OWL constructs. >>> They have no meaning by themselves, just as illustration of the way >>> the RAP netapi handles this. >>> My question: does this example show an RAP bug? >>> Onno Paap >>> >>> This piece of OWL code has no errors in Vowlidator: >>> ============ >>> <rdf:RDF >>> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" >>> xmlns:owl="http://www.w3.org/2002/07/owl#" >>> xml:base="http://www.15926.org/2006/02/onnopaap1"> >>> <owl:Class rdf:ID="AbstractObject"> >>> <rdf:type rdf:resource="#ClassOfAbstractObject"/> >>> </owl:Class> >>> <owl:Class rdf:ID="ClassOfAbstractObject"/> </rdf:RDF> ============ >>> >>> Loaded in RAP gives 3 triples: >>> ============ >>> 1. >>> Resource: http://www.15926.org/2006/02/onnopaap1#AbstractObject >>> RDF Node: rdf:type >>> RDF Node: owl:Class >>> 2. >>> Resource: http://www.15926.org/2006/02/onnopaap1#AbstractObject >>> RDF Node: rdf:type >>> Resource: http://www.15926.org/2006/02/ >>> onnopaap1#ClassOfAbstractObject 3. >>> Resource: http://www.15926.org/2006/02/ >>> onnopaap1#ClassOfAbstractObject RDF Node: rdf:type RDF Node: >>> owl:Class ============ >>> >>> The RAP netapi makes this out of it: >>> ============ >>> <?xml version="1.0" encoding="UTF-8" ?> >>> <!-- >>> Generated by RdfSerializer.php from RDF RAP. >>> # http://www.wiwiss.fu-berlin.de/suhl/bizer/rdfapi/index.html ! >>> --> >>> <rdf:RDF xml:base="http://www.15926.org/2006/02/onnopaap1#" >>> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" >>> xmlns:owl="http://www.w3.org/2002/07/owl#" >>> xmlns:ns1="http://www.15926.org/2006/02/onnopaap1#"> >>> <owl:Class rdf:ID="AbstractObject" /> <ns1:ClassOfAbstractObject >>> rdf:ID="AbstractObject" /> <owl:Class rdf:ID="ClassOfAbstractObject" >>> /> </rdf:RDF> ============ >>> >>> Which gives errors in Vowlidator: >>> ============ >>> [1] WARNING - Parser Indication: http://www.15926.org/2006/02/ >>> onnopaap1#[15:53]: >>> {W105} Redefinition of ID: AbstractObject >>> >>> [2] WARNING - Parser Indication: http://www.15926.org/2006/02/ >>> onnopaap1#[13:37]: >>> {W105} Previous definition of 'AbstractObject'. >>> ============ >>> >>> -------------------------------------------------------------------- >>> -- >>> --- >>> Using Tomcat but need to do more? Need to support web services, >>> security? >>> Get stuff done quickly with pre-integrated technology to make your >>> job easier Download IBM WebSphere Application Server v.1.0.1 based >>> on Apache Geronimo http://sel.as-us.falkag.net/sel? >>> cmd=lnk&kid=120709&bid=263057&dat=121642 >>> _______________________________________________ >>> Rdfapi-php-interest mailing list >>> Rdf...@li... >>> https://lists.sourceforge.net/lists/listinfo/rdfapi-php-interest >>> -- Onno Paap Fluor corporation +31 23 5432116 (work) +31 6 21625149 (mobile) -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.0.405 / Virus Database: 268.11.5/425 - Release Date: 22-Aug-06 |
