On 26 Nov 2010, at 17:43, <[email protected]> <[email protected]> wrote: > I had xmlns:gml="http://www.opengis.net/gml"; as one of the > namespaces defined in the D2RQ mapping.
Prefixes in the D2RQ mapping file are completely separate from prefixes in XML literals, so this won't help. > And this is also reflected in the resulting RDF, i.e. it has gml as > one of the namespaces defined at the top. That doesn't matter. The prefix has to be declared in the XML literal. > I think the question is, how do I get D2RQ to generate the > net:nodeGeometry property with the "rdf:parseType" attribute set to > "Literal" instead of the "rdf:dataType" attribute set to > "rdfs:XMLLiteral". You get D2RQ to generate rdf:parseType="Literal" by providing a well- formed XML literal. To do that, you need to add the XML namespace *to the XML literal*, like I said below. Best, Richard > > > Any thoughts? > > Best regards, > Arif > > > -----Original Message----- > From: Richard Cyganiak [mailto:[email protected]] > Sent: 26 November 2010 17:32 > To: Shaon, Arif (STFC,RAL,ESC) > Cc: [email protected] > Subject: Re: [d2rq-dev] XML Content within an RDF Graph > > Hi Arif, > > I'm not 100% sure, but it *might* be because the XML fragment is not > valid XML. That's because the gml namespace is not declared inside the > XML fragment. XML fragments in RDF always must be self-contained and > include namespace declarations for all XML namespaces. Whether that's > a good design is a separate question, but anyway it's what the RDF > spec demands. > > You might want to modify the ST_AsGML function to include something > like > > xmlns:gml="http://www.opengis.net/gml"; > > to the <gml:Point> tag. If you can't modify the function, then modify > the d2rq:sqlExpression to add some string replacement function that > inserts the xmlns. > > As I said, I'm not 100% sure that this will fix the problem, but > please try this first and if it doesn't help, then I will dig deeper. > > Hope that helps, > Richard > > > On 26 Nov 2010, at 13:29, <[email protected]> > <[email protected]> wrote: > >> Hi List, >> >> I am trying to generate the following RDF property with some XML >> content as its value (in accordance with the relevant RDF spec at: >> http://www.w3.org/TR/rdf-syntax-grammar/#section-Syntax-XML-literals) >> : >> >> <net:nodeGeometry rdf:parseType="Literal"><gml:Point><gml:pos >> srsDimension="2">530980 179740</gml:pos></gml:Point></ >> net:nodeGeometry> >> >> And I have the following D2RQ PropertyBridge defined: >> >> map:trans_pt_point_the_geom a d2rq:PropertyBridge; >> d2rq:belongsToClassMap map:trans_pt_point; >> d2rq:property net:nodeGeometry; >> d2rq:propertyDefinitionLabel "trans_pt_point the_geom"; >> d2rq:sqlExpression "ST_AsGML(3, trans_pt_point.the_geom, 20, >> 1)"; >> d2rq:datatype rdf:XMLLiteral; >> . >> >> But what I get from D2RQ is as follows: >> >> <net:nodeGeometry >> rdf:datatype="http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral >> "><gml:Point><gml:pos srsDimension="2">147780 30660</ >> gml:pos></gml:Point></net:nodeGeometry> >> >> As it is shown above, the XML tags are escaped. >> >> Could someone please advise what I am doing wrong? >> >> Regards >> Arif >> >> >> ****************************************************************** >> Dr Arif Shaon >> >> Software Research Scientist, >> Scientific Applications Group, >> E-Science Centre, Science and Technology Facilities Council, >> Rutherford Appleton Laboratory Chilton, Didcot, OXON, OX11 0QX, UK >> tel: +44 1235 448178 >> [email protected]<mailto:[email protected]> >> ------------------------------------------------------------------------------ >> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! >> Tap into the largest installed PC base & get more eyes on your game >> by >> optimizing for Intel(R) Graphics Technology. Get started today with >> the >> Intel(R) Software Partner Program. Five $500 cash prizes are up for >> grabs. >> http://p.sf.net/sfu/intelisp-dev2dev_______________________________________________ >> d2rq-map-devel mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/d2rq-map-devel > > -- > Scanned by iCritical. ------------------------------------------------------------------------------ Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! Tap into the largest installed PC base & get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev _______________________________________________ d2rq-map-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/d2rq-map-devel
