HermiT推理者为数据类型编写了“UnsupportedDatatypeException”
HermiT推理者为数据类型编写了“UnsupportedDatatypeException”
提问于 2019-12-09 16:50:03
我想从本体文件dbpedia_2016-10.owl (从https://wiki.dbpedia.org/downloads-2016-10下载)中删除file本体类，我通过引用其他代码构建了这个方法，因为我是这个领域的初学者：
public static void importOntology(String ontologyFile) throws Exception {
File file = new File(ontologyFile);
if (file.exists()) {
OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
OWLOntology ontology = manager.loadOntologyFromOntologyDocument(file);
Reasoner reasoner=new Reasoner(ontology);
if (!reasoner.isConsistent()) {
throw new Exception("Ontology is inconsistent");
}
for (OWLClass c :ontology.getClassesInSignature(true)) {
String classString = c.toString();
System.out.println(classString);
if (classString.contains("#")) {
classString = classString.substring(classString.indexOf("#")+1,classString.lastIndexOf(">"));
}
Set<OWLClassExpression> superclasses = c.getSuperClasses(ontology);
if (superclasses.isEmpty()) {
System.out.println(classString + " is owl#Thing.");
} else {
for (OWLClassExpression superc:superclasses) {
System.out.println(superc + " is a parent.");
}
}
}
}
}当我声明并实例化HermiT推理器时，我会得到以下异常：
org.semanticweb.HermiT.datatypes.UnsupportedDatatypeException: HermiT supports all and only the datatypes of the OWL 2 datatype map, see
http://www.w3.org/TR/owl2-syntax/#Datatype_Maps.
The datatype 'http://dbpedia.org/datatype/hour' is not part of the OWL 2 datatype map and
no custom datatype definition is given;
therefore, HermiT cannot handle this datatype.现在，我发现HermiT在抱怨它不认识的数据类型，但是如何在不修改本体的情况下解决这个问题呢？
我不确定这是否有帮助，但这是我的项目的重点：
<dependencies>
<dependency>
<groupId>com.hermit-reasoner</groupId>
<artifactId>org.semanticweb.hermit</artifactId>
<version>1.3.8.4</version>
</dependency>
<dependency>
<groupId>net.sourceforge.owlapi</groupId>
<artifactId>owlexplanation</artifactId>
<version>2.0.0</version>
</dependency>
</dependencies>谢谢您的指导！
回答 1
Stack Overflow用户
回答已采纳
发布于 2019-12-09 17:35:18
为了测试这一点，我将DBPedia本体加载到Protege5.5中，并使用HermiT 1.4.3.517对其进行推理。这是没有问题的。因此，我认为您应该查看OWL和HermiT maven依赖项。
<dependency>
<groupId>net.sourceforge.owlapi</groupId>
<artifactId>owlapi-distribution</artifactId>
<version>5.1.12</version>
</dependency>
<dependency>
<groupId>net.sourceforge.owlapi</groupId>
<artifactId>org.semanticweb.hermit</artifactId>
<version>1.4.3.517</version>
</dependency>更新
你似乎也不正确地开始推理者。这里使用上面的Maven依赖项的一些工作代码。
import org.semanticweb.HermiT.ReasonerFactory;
import org.semanticweb.owlapi.apibinding.OWLManager;
import org.semanticweb.owlapi.model.*;
import org.semanticweb.owlapi.reasoner.OWLReasoner;
import org.semanticweb.owlapi.reasoner.OWLReasonerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.Marker;
import org.slf4j.MarkerFactory;
import java.io.File;
public class LoadDBPedia {
private static Logger logger = LoggerFactory.getLogger(LoadDBPedia.class);
// Why This Failure marker
private static final Marker WTF_MARKER = MarkerFactory.getMarker("WTF");
private static String ONTOLOGY_FILE = "/path_to_ontology/dbpedia_2016-10.owl";
public static void main(String[] args) {
try {
File file = new File(ONTOLOGY_FILE);
if (file.exists()) {
OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
OWLOntology ontology = manager.loadOntologyFromOntologyDocument(file);
OWLReasonerFactory reasonerFactory = new ReasonerFactory();
OWLReasoner reasoner = reasonerFactory.createReasoner(ontology);
if (!reasoner.isConsistent()) {
logger.debug("Ontology is inconsistent");
throw new Exception("Ontology is inconsistent");
} else {
logger.debug("Ontology is consistent");
}
}
} catch (Throwable t) {
logger.error(WTF_MARKER, t.getMessage(), t);
}
}
}你的代码可能出了什么问题？
(1)这一行Reasoner reasoner=new Reasoner(ontology);是可疑的，因为(a)不清楚Reasoner类是从哪里得到的，(b)似乎不是来自HermiT，因为HermiT中的Reasoner构造函数具有不同的签名。
(2)您依赖owlexplanation而不是owlapi-distribution这一事实是可疑的。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/59253289
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