Question

我试图找出本体是否不一致，如果它不一致则打印哪些是导致不一致的类/公理。我得到了关于不一致性检查的正确结果，但是在打印不一致背后的公理列表时我被卡住了。我尝试了一个stackoverflow问题中提到的方法，但它没有用。

我查了一下，问题是解释变量中没有存储任何解释列表。你能指出我出错的地方吗？

    package com.tcs.HermiT;

import java.io.File;
import java.util.Set;





import org.semanticweb.HermiT.Configuration;
import org.semanticweb.HermiT.Reasoner;
import org.semanticweb.HermiT.Reasoner.ReasonerFactory;
import org.semanticweb.owlapi.apibinding.OWLManager;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLAxiom;
import org.semanticweb.owlapi.model.OWLDataFactory;
import org.semanticweb.owlapi.model.OWLNamedIndividual;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyCreationException;
import org.semanticweb.owlapi.model.OWLOntologyManager;
import org.semanticweb.owlapi.reasoner.InconsistentOntologyException;
import org.semanticweb.owlapi.reasoner.OWLReasoner;
import org.semanticweb.owlapi.reasoner.OWLReasonerFactory;

import com.clarkparsia.owlapi.explanation.BlackBoxExplanation;
import com.clarkparsia.owlapi.explanation.ExplanationGenerator;
import com.clarkparsia.owlapi.explanation.HSTExplanationGenerator;

public class Demo {

    public void reason() throws OWLOntologyCreationException {
        // First, we create an OWLOntologyManager object. The manager will load and save ontologies.
        OWLOntologyManager m = OWLManager.createOWLOntologyManager();
        OWLDataFactory dataFactory=m.getOWLDataFactory();

        File inputOntologyFile = new File("C:\\Users\\1047785\\Desktop\\HermiT\\Input10.owl");
        OWLOntology o=m.loadOntologyFromOntologyDocument(inputOntologyFile);// Now, we instantiate HermiT by creating an instance of the Reasoner class in the package org.semanticweb.HermiT.



        ReasonerFactory factory = new ReasonerFactory();
        Configuration configuration=new Configuration();
        configuration.throwInconsistentOntologyException = false;
        OWLReasoner reasoner=factory.createReasoner(o, configuration);

        System.out.println("Consistency : "+reasoner.isConsistent());
        System.out.println("Computing explanations for the inconsistency...");
        factory=new Reasoner.ReasonerFactory() {
            protected OWLReasoner createHermiTOWLReasoner(org.semanticweb.HermiT.Configuration configuration,OWLOntology o) {
                // don't throw an exception since otherwise we cannot compte explanations 
                configuration.throwInconsistentOntologyException=false;
                return new Reasoner(configuration,o);
            }  
        };


        BlackBoxExplanation exp=new BlackBoxExplanation(o, factory, reasoner);
        HSTExplanationGenerator multExplanator=new HSTExplanationGenerator(exp);
        // Now we can get explanations for the inconsistency 
        Set<Set<OWLAxiom>> explanations=multExplanator.getExplanations(dataFactory.getOWLThing());

        // Let us print them. Each explanation is one possible set of axioms that cause the 
        // unsatisfiability. 
        for (Set<OWLAxiom> explanation : explanations) {
            System.out.println("------------------");
            System.out.println("Axioms causing the inconsistency: ");
            for (OWLAxiom causingAxiom : explanation) {
                System.out.println(causingAxiom);
            }
            System.out.println("------------------");
        }


    }
}

输出为

一致性：真/假（正确结果）

计算不一致的解释

Answer 1

owl api中的解释类很古老而且效率不高。由Matthew Horridge在GitHub上维护的owlexplanation项目有替代品。您可以尝试调整代码以使用它们。不幸的是，我没有一个方便的例子。

关于Java中OWL 2本体不一致的解释

1 个答案: