[Pellet-users] Strange Pellet behaviour with getIndividuals

[Nick Drummond]

You can use refresh or...

Pellet will only act on ontology updates if you add it as an ontology  
change listener.

         pellet.getManager().addOntologyChangeListener(pellet);

Unfortunately, this means you can't tell how long a given update is  
going to take (as pellet will need to take different strategies  
depending on what you are adding/removing).
This might not be an issue if you adding things in a predictable  
manner and you are not running something time-critical.
And it does mean you can ask pellet about things as you add them.

Nick


On 9 May 2008, at 10:11, Robert Davey wrote:

> Hi Gustavo,
>
> The only "updating" method that I can see on the Reasoner is the
> refresh() method, and that reloads the ontology from scratch, which I
> don't really want to do.
>
> I thought the reference to the OWLOntologyManager in the Reasoner  
> should
> track any ontology changes and allow the reasoner to update  
> accordingly?
>
> Cheers
>
> Rob
>
> On Thu, 2008-05-08 at 18:40 -0300, Gustavo Enrique Salazar Torres  
> wrote:
>> Hi Robert
>> Perhaps you should update the reasoner's knowledge base.
>>
>> Best Regards
>>
>> On Thu, May 8, 2008 at 1:37 PM, Robert Davey
>> <robert.davey at bbsrc.ac.uk> wrote:
>>        Hi all,
>>
>>        I really don't know if this is just me, but I'm having trouble
>>        getting
>>        some individuals out of the Pizza ontology [1].
>>
>>        I'm adding an individual for each of the NamedPizzas in a
>>        simple loop...
>>
>>        <snip>
>>        OWLClass pizzaClass =
>>        factory.getOWLClass(URI.create("http://www.co-ode.org/ontologies/pizza/pizza.owl#NamedPizza 
>> "));
>>        int count = 0;
>>        for (OWLSubClassAxiom sca :
>>        ontology.getSubClassAxiomsForRHS(pizzaClass))
>>        {
>>           count++;
>>           OWLIndividual individual =
>>        dataFactory.getOWLIndividual(ontology.getURI().toString() 
>> +count));
>>           owlOntologyManager.applyChange(new AddAxiom(ontology,
>>        dataFactory.getOWLClassAssertionAxiom(individual,
>>        (OWLClass)sca.getSubClass())));
>>        }
>>        </snip>
>>
>>        I load the ontology into Pellet prior to adding the
>>        individuals, but I
>>        understand that shouldn't make any difference with the way the
>>        OWLOntologyManager stuff should work.  I then try and get all
>>        the
>>        individuals using:
>>
>>        reasoner.getIndividuals();
>>
>>        However, it only outputs the 5 Country individuals that are
>>        already
>>        asserted in the Pizza ontology.  There should be 23 more
>>        individuals,
>>        one for each NamedPizza subclass.
>>
>>        If I use:
>>
>>        ontology.getReferencedIndividuals()
>>
>>        I can see all the individuals correctly.
>>
>>        Bear in mind that I have a bit of an old bunch of Pellet jars
>>        built from
>>        SVN, and I can't get to the new SVN versions.
>>
>>        Am I being daft?
>>
>>        Cheers
>>
>>        Rob
>>
>>        [1]
>>        http://www.co-ode.org/ontologies/pizza/2007/02/12/pizza.owl
>>
>>        --
>>        ---------------------------------------
>>        Dr. Rob Davey
>>        NCYC / Institute of Food Research
>>        Computational Biology / John Innes Centre
>>        Norwich Research Park
>>        Norwich, Norfolk, NR4 7HU
>>
>>        http://www.comparagrid.org/
>>        http://cbr.jic.ac.uk/dicks/
>>        ---------------------------------------
>>
>>        _______________________________________________
>>        Pellet-users mailing list
>>        Pellet-users at lists.owldl.com
>>        http://lists.owldl.com/mailman/listinfo/pellet-users
>>        _______________________________________________
>>
>>        Sponsored by Clark & Parsia, LLC http://clarkparsia.com/
>>
>>
>>
>> -- 
>> Gustavo Salazar Torres
>> MSc.(C) in Computer Science
>> IME-USP
>> http://www.ime.usp.br/~gsalazar
>> ---------------------------------
>> "En la sencillez de mi corazon te he dado todo con alegría" Mons.
>> Luigi Giussani
> -- 
> ---------------------------------------
> Dr. Rob Davey
> NCYC / Institute of Food Research
> Computational Biology / John Innes Centre
> Norwich Research Park
> Norwich, Norfolk, NR4 7HU
>
> http://www.comparagrid.org/
> http://cbr.jic.ac.uk/dicks/
> ---------------------------------------
>
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