Re: [Rdfapi-php-interest] Questions about OntModel

[Alexandre P. <al...@pa...>]

Hi,

FYI, I managed to do what I wanted using InfModel, and not OntModel.

The 3 steps are:
- Adding the vocabulary in RAP vocabularies
- Defining the model as an instance of InfModelF
- Adding subproperties statements as:
$this->add(new Statement(RELATIONSHIP::ACQUAINTANCE_OF(),
RDFS::SUB_PROPERTY_OF(), FOAF::KNOWS());

So that any findFirstMatchingStatement($subject, FOAF::KNOWS, $null)
query returns all statements with rel:xxx as a predicate.

As I have to add the Relationship vocabulary in RAP, I created a small
script to quickly do it, instead of writing or copy/pasting
properties/class definition.
The script can be used for any vocabulary, and can be downloaded here:
http://apassant.net/share/semweb/vocab2rap-0.1.tgz. Feel free to add
it in RAP if you think it's usefull.

Alex.

2006/2/23, Josef Petr=E1k <jsp...@gm...>:
> Hi,
>
> I am not sure how exactly the OntModel works but be aware! FOAF and
> relationship module are not ontologies but "plain" RDF Schemas. While
> I was playing with Java tool Jastor for generating model from
> ontologies I was faced with this problem and got into trouble.
>
> Josef Petr=E1k
>
> On 2/23/06, Alexandre Passant <al...@pa...> wrote:
> > Hi,
> >
> > I used RAP to write a FOAF parser [1], in which I use MemModel to read
> > my RDF files.
> >
> > I recently thaught about FOAF extensions, as the Relationship
> > vocabulary [2], which defines some subproperties of foaf:knows.
> >
> > At the moment, with my MemModel, I use
> > findFirstMatchingStatement($subject, FOAF::KNOWS, $null) to get all
> > foaf:knows classes related to my subject.
> >
> > But, I assume, it won't work if the RDF files that use rel:worksWith
> > instead of foaf:knows.
> >
> > Is that the role of OntModel to make this kind of queries work ? If
> > so, should I have to write somewhere (in vocabulary folder) the
> > Relationship model and its mapping with FOAF ?
> >
> > Thanx for any advice on this point.
> >
> > [1] http://gna.org/projects/phoaf
> > [2] http://vocab.org/relationship/
> >
> >
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