如何解决OWL-API重命名不会删除旧的owl:Thinger中的Thing子类
在使用owl-api重命名一个类之后,我没有得到我期望的子类列表。我创建了一个小例子来演示。
该本体包含2类:狗和飞盘。然后,我将Dog重命名为Cat。重命名后,owl:Thing子类的列表同时包含Dog和Cat。
这是rename-test.owl文件:
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-Syntax-ns#"
xmlns:owl="http://www.w3.org/2002/07/owl#"
xmlns="http://example.org/owl-api/rename/"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#">
<owl:Ontology rdf:about="http://example.org/owl-api/rename"/>
<owl:Class rdf:about="http://example.org/owl-api/rename/Frisbee"/>
<owl:Class rdf:about="http://example.org/owl-api/rename/Dog"/>
</rdf:RDF>
这是Java测试文件:
package org.example;
import java.io.File;
import java.util.Collections;
import java.util.List;
import org.semanticweb.owlapi.apibinding.OWLManager;
import org.semanticweb.owlapi.io.FileDocumentSource;
import org.semanticweb.owlapi.io.OWLOntologyDocumentSource;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLClass;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyChange;
import org.semanticweb.owlapi.model.OWLOntologyCreationException;
import org.semanticweb.owlapi.model.OWLOntologyManager;
import org.semanticweb.owlapi.reasoner.OWLreasoner;
import org.semanticweb.owlapi.reasoner.structural.StructuralreasonerFactory;
import org.semanticweb.owlapi.util.OWLEntityRenamer;
public class OwlapiRenameTest_main {
public static void main(String[] args) {
String owlPath = "c:\\owl-tests\\rename-test.owl";
String oldUri = "http://example.org/owl-api/rename/Dog";
String newUri = "http://example.org/owl-api/rename/Cat";
runRenameTest(owlPath,oldUri,newUri);
}
static void runRenameTest(String owlPath,String oldUri,String newUri) {
OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
OWLOntologyDocumentSource owlFile = new FileDocumentSource(new File(owlPath));
try {
OWLOntology ontology = manager.loadOntologyFromOntologyDocument(owlFile);
OWLreasoner reasoner = new StructuralreasonerFactory().createNonBufferingreasoner(ontology);
dumpStmts(ontology);
dumpSubclasses(ontology,reasoner);
OWLEntityRenamer renamer = new OWLEntityRenamer(manager,Collections.singleton(ontology));
List<? extends OWLOntologyChange> changes = renamer.changeIRI(
IRI.create(oldUri),IRI.create(newUri));
manager.applyChanges(changes);
System.out.println("** rename applied **");
//does not help (which it shouldn't anyway for non-buffering reasoner)
reasoner.flush();
dumpStmts(ontology);
dumpSubclasses(ontology,reasoner);
} catch (OWLOntologyCreationException e) {
e.printstacktrace();
}
}
static void dumpStmts(OWLOntology ontology) {
System.out.println("** dump all start **");
ontology.axioms().forEach(axiom -> System.out.println(" axiom: " + axiom));
System.out.println("** dump all end **");
}
static void dumpSubclasses(OWLOntology ontology,OWLreasoner reasoner) {
System.out.println("** owl:Thing subclasses **");
OWLClass thingClass = ontology.getoWLOntologyManager().getoWLDataFactory().getoWLClass(
IRI.create("http://www.w3.org/2002/07/owl#Thing"));
reasoner.getSubClasses(thingClass,true).entities().forEach(entity ->
System.out.println(" " + entity.toString()));
}
}
我得到的输出如下:
** dump all start **
axiom: Declaration(Class(<http://example.org/owl-api/rename/Frisbee>))
axiom: Declaration(Class(<http://example.org/owl-api/rename/Dog>))
** dump all end **
** owl:Thing subclasses **
<http://example.org/owl-api/rename/Frisbee>
<http://example.org/owl-api/rename/Dog>
** rename applied **
** dump all start **
axiom: Declaration(Class(<http://example.org/owl-api/rename/Frisbee>))
axiom: Declaration(Class(<http://example.org/owl-api/rename/Cat>))
** dump all end **
** owl:Thing subclasses **
<http://example.org/owl-api/rename/Frisbee>
<http://example.org/owl-api/rename/Dog>
<http://example.org/owl-api/rename/Cat>
您可以看到,重命名后,Dog类不在公理列表中,但非缓冲推理者认为是这样。
我需要以某种方式调整代码吗?我尝试在没有任何区别的推理机上使用flush(),这对于非缓冲推理机是有意义的。我找不到其他类似的方法可以尝试。我不想自动保存,因为这是用户必须手动保存的OWL编辑器。
解决方法
请勿使用结构推理器。它不适合在现实世界中使用,并且可能会保留不应使用的缓存。只需在本体中写出公理,该本体中就没有足够的功能来工作了。
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