Re: [dotNetRDF-Develop] Writing <rdf:about> as RDF/XML format

[Tomasz P. <tom...@gm...>]

On Tue, Jul 1, 2014 at 7:44 AM, son...@gm...
<son...@gm...> wrote:
> Hi, all
>
> I am trying to write a RDF/XML like follows:
> -------------------------------------------------------
> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
> xmlns:KB="http://protege.stanford.edu/kb#">
>   <KB:EndToEndBlueprintRoot
> rdf:about="http://protege.stanford.edu/kb#DemoRootImagineID001">
>     xxxxx
>   </KB:EndToEndBlueprintRoot>
> </rdf:RDF>
> -------------------------------------------------------
>

First of all this document is not a valid RDF/XML.

> Here is my code
> -------------------------------------------------------
>             INode s = g.CreateUriNode("kb:"+"EndToEndBlueprintRoot");
>             INode p = g.CreateUriNode("rdf:about");
>             INode o = g.CreateUriNode("kb:"+"DemoRootImagineID001");
>
>             g.Assert(new Triple(s,p,o));
>
>             RdfXmlWriter rxw = new RdfXmlWriter();
>             string res = VDS.RDF.Writing.StringWriter.Write(g, rxw);
> -------------------------------------------------------
>

Secondly, the rdf:about is just a RDF/XML syntax feature and not a
predicate. It denotes that part of an RDF/XML document is grouped with
a common subject. Please read [1].

You should think in terms of triples, which define a relation
(predicate) between two objects (subjects and objects). That is much
like in natural language.

>
> But only got this
> -------------------------------------------------------
> <rdf:RDF xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
> xmlns:xsd="http://www.w3.org/2001/XMLSchema#" xmlns="http://example.org/"
> xmlns:a="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
> xmlns:kb="http://protege.stanford.edu/kb#"
> xmlns:ns0="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
>   <rdf:Description rdf:about="&kb;EndToEndBlueprintRoot">
> xxx
>     <ns3:about xmlns:ns3="http://protege.stanford.edu/system#"
> rdf:resource="&kb;DemoRootImagineID001" />
>   </rdf:Description>
> </rdf:RDF>
> -------------------------------------------------------
>
> Is my usage correct? or how can I output the format that I want?
> What is the appropriate writing of "rdf:about"?
>

You probably mean kb:DemoRootImagineID001 as you subject, that is the
thing you want to describe in your document. Is that right?

Please describe what kind of data you want your document to contain.

>
> Any suggestion will be appreciated!
>
> ________________________________
> son...@gm...
>

Regards,
Tom

[1] http://stackoverflow.com/questions/7118326/differences-between-rdfresource-rdfabout-and-rdfid