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[protege-discussion] RE : problems classifying OWL-DL ontology containing import command

Alexandre Vidal vidal at ime.usp.br
Thu Jul 26 09:58:20 PDT 2007


Hi, Ammar.

I couldn't try your suggestion yet, because my machine has a limited
memory. I'll try later in other more robust machine. But I think that
your guess is right.

Thanks
[]s
Alexandre Vidal


On 7/25/07, Ammar MECHOUCHE <mechov at yahoo.fr> wrote:
> Hi Alexandre,
>  I am not sure, but try to increase the  Xmx value, try for example the
> following value -Xmx1024M.
>
>  Bye.
>  Ammar.
>
>
>
>
>  Alexandre Vidal <vidal at ime.usp.br> a écrit :
>  Hi. Could someone help me?
>
> I'm testing the classification task on two OWL-DL ontologies:
> (1)
> http://www.deinf.ufma.br/~vidal/GBOS/PlatformOntology.owl
> (2)
> http://www.deinf.ufma.br/~vidal/GBOS/GridBaseOntology.owl
>
> I submitted both ontologies to validator, and they are Ok.
>
> The ontology (1) does not import any ontology, while the ontology (2) does.
>
> I'm using Eclipse and Protégé-OWL API with this simple code:
>
> try {
>  JenaOWLModel gridOwlModel =
> ProtegeOWL.createJenaOWLModelFromURI(ONTOLOGY_URL);
>
>  ReasonerManager reasonerManager = ReasonerManager.getInstance();
>
>  ProtegeOWLReasoner reasoner = reasonerManager.getReasoner(gridOwlModel);
>
>  // Set the reasoner URL and test the connection.
>  reasoner.setURL(REASONER_URL);
>
>  if (reasoner.isConnected()) {
>  DIGReasonerIdentity reasonerIdentity = reasoner.getIdentity();
>  System.out.println("Connected to " + reasonerIdentity.getName() + " " +
>  reasonerIdentity.getVersion());
>
>  // We can classify the whole ontology, which will put the
>  // inferred class hierarchy information directly into the
> Protégé-OWL model.
>  System.out.println("Classifying taxonomy...");
>  reasoner.classifyTaxonomy(null);
>  System.out.println("...Classified taxonomy!");
>  else {
>  System.out.println("Reasoner not connected!");
>  }
> } catch (Exception e) {
>  // TODO Auto-generated catch block
>  e.printStackTrace();
> }
>
>
> I have no problem to classify the former ontology;
> However, when I try to classify the later, I get the error messages
> below, though I've been succeed before classifying this same ontology.
> What could cause such errors?
> ----------------------------------------------------------------------------------------------
> vidal at vidal-laptop:/home/pos/aplicativos/pellet-1.4-RC1$ sh pellet-dig.sh
>
> PelletDIGServer Version 1.4-RC1 (November 7 2006)
> Port: 8081
>  WARN [HttpConnection] - POST / HTTP/1.1
> java.lang.OutOfMemoryError: Java heap space // error on Pellet execution
> ---------------------------------------------------------------------------------------------
> Eclipse error Message:
> JVM terminated. Exit code=1
> /usr/bin/java
> -Xms40m
> -Xmx256m
> -jar /home/pub/eclipse3.2//startup.jar
> -os linux
> -ws gtk
> -arch x86
> -launcher /home/pub/eclipse3.2//eclipse
> -name Eclipse
> -showsplash 600
> -exitdata 46000a
> -data /home/vidal/Workspace
> -vm /usr/bin/java
> -vmargs
> -Xms40m
> -Xmx256m
> -jar /home/pub/eclipse3.2//startup.jar
>
> Thanks.
>
> Alexandre
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