rdfapi-php-interest

[Rdfapi-php-interest] error in loading ontology

[AJ C. <ca...@gm...>]

Hi, I'm new to RAP, trying to use RAP to load a DOAP file. But, there is a
fatal error:

PHP Fatal error:  RDFAPI error (class: parser; method: generateModel):
XML-parser-error 201 in Line 13 of input document.

line 13 is     <doap:shortdesc>     in the following rdf section:
  <doap:Project>
    <doap:name>Redland RDF Application Framework</doap:name>
    <doap:homepage rdf:resource=3D"http://www.redland.opensource.ac.uk/" />
    <doap:created>2000-06-21</doap:created>
    <doap:shortdesc>
        A library for the Resource Description Framework (RDF) allowing
        it parsed from XML, stored, queried and
        manipulated.
    </doap:shortdesc>
....

my code to load ontology is:

$ontModel =3D ModelFactory::getOntModel(MEMMODEL,RDFS_VOCABULARY);
$ontModel->load("doap_redland.rdf");

Any suggestion for loading DOAP file?  I assume RAP knows how to load
instance of any class like doap:Project. If this is not true,  then how to
have RAP to work with a custom ontology?

Thanks,
AJ

Re: [Rdfapi-php-interest] error in loading ontology

[Richard C. <ri...@cy...>]

Hi AJ,

can you please post the complete RDF file (or make it available  
online and send a link)? Have you checked it against the RDF  
validator [1]? Which PHP version are you using? The snippet looks  
fine and RAP shouldn't have trouble with it.

Cheers,
Richard

[1] http://www.w3.org/RDF/Validator/


On 29 May 2006, at 05:45, AJ Chen wrote:

> Hi, I'm new to RAP, trying to use RAP to load a DOAP file. But,  
> there is a fatal error:
>
> PHP Fatal error:  RDFAPI error (class: parser; method:  
> generateModel): XML-parser-error 201 in Line 13 of input document.
>
> line 13 is     <doap:shortdesc>     in the following rdf section:
>   <doap:Project>
>     <doap:name>Redland RDF Application Framework</doap:name>
>     <doap:homepage rdf:resource="http:// 
> www.redland.opensource.ac.uk/" />
>     <doap:created>2000-06-21</doap:created>
>     <doap:shortdesc>
>         A library for the Resource Description Framework (RDF)  
> allowing
>         it parsed from XML, stored, queried and
>         manipulated.
>     </doap:shortdesc>
> ....
>
> my code to load ontology is:
>
> $ontModel = ModelFactory::getOntModel(MEMMODEL,RDFS_VOCABULARY);
> $ontModel->load("doap_redland.rdf");
>
> Any suggestion for loading DOAP file?  I assume RAP knows how to  
> load instance of any class like doap:Project. If this is not true,   
> then how to have RAP to work with a custom ontology?
>
> Thanks,
> AJ

Re: [Rdfapi-php-interest] error in loading ontology

[Richard C. <ri...@cy...>]

Hi AJ,

On 30 May 2006, at 09:00, AJ Chen wrote:
> I debuged it with Jena and fixed the RDF file. Now, I can read/ 
> write ontology in RDF/XML with RAP.  RAP is great!  I'm using it to  
> develop plugins for semantic web support.

:-)

> Another question: how to control what default namespaces to use?  
> there are some default namespaces that I don't want to write into  
> rdf file. I know they can be removed by calling the remove method  
> on model. But, if there is a config file listing these namespaces,  
> then it will be easier to add and remove. Please give me a pointer.

Have a look at api/constants.php, there's this section:

//  
------------------------------------------------------------------------ 
----------
// RDQL, SPARQL and parser default namespace prefixes
//  
------------------------------------------------------------------------ 
----------

$default_prefixes = array(
    RDF_NAMESPACE_PREFIX => RDF_NAMESPACE_URI,
    RDF_SCHEMA_PREFIX => RDF_SCHEMA_URI,
    'xsd'  => 'http://www.w3.org/2001/XMLSchema#',
    OWL_PREFIX => OWL_URI,
    'dc' => 'http://purl.org/dc/elements/1.1/',
    'dcterms' => 'http://purl.org/dc/terms/',
    'vcard' => 'http://www.w3.org/2001/vcard-rdf/3.0#',
    'kb_sys' => 'http://purl.org/knowledgebay/ontology/sys#',
    'kb_person' => 'http://purl.org/knowledgebay/ontology/person#',
    'kb_keyword' => 'http://purl.org/knowledgebay/ontology/keyword#',
    'kb_lecture' => 'http://purl.org/knowledgebay/ontology/lecture#',
    'kb_location' => 'http://purl.org/knowledgebay/ontology/location#'
);

Just remove those you don't want.

Richard



>
> Thanks,
> AJ
>
> On 5/29/06, Richard Cyganiak <ri...@cy...> wrote: Hi AJ,
>
> can you please post the complete RDF file (or make it available
> online and send a link)? Have you checked it against the RDF
> validator [1]? Which PHP version are you using? The snippet looks
> fine and RAP shouldn't have trouble with it.
>
> Cheers,
> Richard
>
> [1] http://www.w3.org/RDF/Validator/
>
>
> On 29 May 2006, at 05:45, AJ Chen wrote:
>
> > Hi, I'm new to RAP, trying to use RAP to load a DOAP file. But,
> > there is a fatal error:
> >
> > PHP Fatal error:  RDFAPI error (class: parser; method:
> > generateModel): XML-parser-error 201 in Line 13 of input document.
> >
> > line 13 is     <doap:shortdesc>     in the following rdf section:
> >   <doap:Project>
> >     <doap:name>Redland RDF Application Framework</doap:name>
> >     <doap:homepage rdf:resource="http://
> > www.redland.opensource.ac.uk/" />
> >     <doap:created>2000-06-21</doap:created>
> >     <doap:shortdesc>
> >         A library for the Resource Description Framework (RDF)
> > allowing
> >         it parsed from XML, stored, queried and
> >         manipulated.
> >     </doap:shortdesc>
> > ....
> >
> > my code to load ontology is:
> >
> > $ontModel = ModelFactory::getOntModel(MEMMODEL,RDFS_VOCABULARY);
> > $ontModel->load("doap_redland.rdf");
> >
> > Any suggestion for loading DOAP file?  I assume RAP knows how to
> > load instance of any class like doap:Project. If this is not true,
> > then how to have RAP to work with a custom ontology?
> >
> > Thanks,
> > AJ
>
>