Parsing an RDFSchema file

2006, July 14 - 13:00 — enisch@gmail.com

Hi everyone,

I need to parse an RDFS file (RDFS-Schema) (which is an ontology,
containing
classes, sub-classes, properties...). I tried the API Jena, but the
examples
I found just parse data (RDF files) and not RDF-schemas. Do you have an
example of a java class that parse an RDFS file ?

thanks.

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Developers

2006, July 14 - 13:00 — Danny Ayers

Parsing an RDFSchema file

On 7/11/06, enisch@gmail.com wrote:
>
> Hi everyone,
>
> I need to parse an RDFS file (RDFS-Schema) (which is an ontology,
> containing
> classes, sub-classes, properties...). I tried the API Jena, but the
> examples
> I found just parse data (RDF files) and not RDF-schemas. Do you have an
> example of a java class that parse an RDFS file ?

RDF schemas are RDF, so you can use the standard parsers loading data
into a regular Model. If you're wanting to use RDFS inference, there
is the Ontology API, see:

http://jena.sourceforge.net/ontology/index.html

Cheers,
Danny.

http://dannyayers.com

2006, July 14 - 13:00 — enisch@gmail.com

Parsing an RDFSchema file

Thanks, I read that but I can't find a full example that reads the
ontology and returns classes, sub-classes, and properties.

2006, July 14 - 13:00 — Danny Ayers

Parsing an RDFSchema file

On 7/13/06, enisch@gmail.com wrote:
>
> Thanks, I read that but I can't find a full example that reads the
> ontology and returns classes, sub-classes, and properties.

It depends on what you want to do, but you can achieve this kind of thing with -

ResIterator iter = model.listSubjectsWithProperty(RDF.type, RDF.Property);
while (iter.hasNext()) {
Resource r = iter.nextResource();
...
}

Check the Javadoc for Model and -

http://jena.sourceforge.net/tutorial/RDF_API/index.html#ch-Querying%20a%20Model

Cheers,
Danny.

http://dannyayers.com

2006, September 2 - 17:57 — enisch@gmail.com

Parsing an RDFSchema file

how to read the ontology file ?
I tried with this but it deoes'nt work :

InputStream in = FileManager.get().open("OntologieTourism.rdf");
if (in == null) {
throw new IllegalArgumentException("File: "+OntologieTourism.rdf+"not
found");}
model.read(in, "OntologieTourism.rdf");

2006, September 2 - 17:57 — Christoph Görn

Parsing an RDFSchema file

Hello, looks like you are using Java and Jena, best place to ask
those questions is the Jena-dev Mailinglist at Yahoo!

From my mind the easiest way is a model.read("OntologieTourism.rdf");

Christoph

Am 02.08.2006 um 02:39 schrieb nice:
>
> how to read the ontology file ?
> I tried with this but it deoes'nt work :
>
> InputStream in = FileManager.get().open("OntologieTourism.rdf");
> if (in == null) {
> throw new IllegalArgumentException("File: "+OntologieTourism.rdf
> +"not
> found");}
> model.read(in, "OntologieTourism.rdf");

--
Christoph Görn
http://B4mad.Net/FOAF/goern.rdf#goern

Usability schmusability... where's the part where we talk about how
this helps users kick ass?

Parsing an RDFSchema file

Parsing an RDFSchema file

Parsing an RDFSchema file

Parsing an RDFSchema file

Parsing an RDFSchema file

Parsing an RDFSchema file

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