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
------------------------------------------------------------------------------
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
