如何使用JENA创建owl文件？
我陷入了本体创作的中间。 我想用Java创建一个OWL文件，这是我的目标。 我已经创建了分层集群，但现在我必须在本体创建中使用这些集群。
提前致谢。
到目前为止我已经尝试过了。 我得到了狄金森的观点。 现在这是我的代码，我在线程“main”中获得Exception as Exception com.hp.hpl.jena.shared.BadURIException：只有格式良好的绝对URIrefs可以包含在RDF / XML输出中：代码：57 / REQUIRED_COMPONENT_MISSING在SCHEME中：缺少该方案所需的组件。
JenaOwl.java
public class JenaOwl { static OntModel jenaModel = null; public static void main(String[] args) throws IOException { JenaOwl jo = new JenaOwl(); FileWriter fw = null; try { jenaModel = createModel(); } catch (Exception ex) { Logger.getLogger(JenaOwl.class.getName()).log(Level.SEVERE, null, ex); } OutputStream output = null; try { fw = new FileWriter("D:/mymodel.owl"); jenaModel.write( fw, "RDF/XML-ABBREV" ); fw.close(); // OR Turtle format - compact and more readable // use this variant if you're not sure which to use! fw = new FileWriter("D:/mymodel.ttl"); jenaModel.write( fw, "Turtle" ); // output = new FileOutputStream(new File("D:/Sample.owl")); // jenaModel.write(output); //jo.write(output); } finally { if (fw != null) { try { fw.close(); } catch (IOException ignore) { } } } } //jenaModel.write(output)} public static OntModel createModel() throws Exception { jenaModel = ModelFactory.createOntologyModel(OntModelSpec.OWL_DL_MEM); jenaModel.setNsPrefix("ot", OT.NS); jenaModel.setNsPrefix("owl", OWL.NS); jenaModel.setNsPrefix("dc", DC.NS); // OT ot = new OT(); // OT.OTClass otc; System.out.println("jenaModel.getOntClass(OT.OTClass.Dataset.getNS()) : "+jenaModel.getOntClass(OT.OTClass.Dataset.getNS())); Individual dataset = jenaModel.createIndividual("Dataset URI", jenaModel.getOntClass(OT.OTClass.Dataset.getNS())); OT.OTClass.Dataset.createOntClass(jenaModel); OT.OTClass.DataEntry.createOntClass(jenaModel); OT.OTClass.Feature.createOntClass(jenaModel); OT.OTClass.FeatureValue.createOntClass(jenaModel); OT.OTClass.Compound.createOntClass(jenaModel); Individual dataEntry = jenaModel.createIndividual(OT.OTClass.DataEntry.getOntClass(jenaModel)); dataset.addProperty(OT.dataEntry, dataEntry); Individual compound = jenaModel.createIndividual("compoundURI", OT.OTClass.Compound.getOntClass(jenaModel)); dataEntry.addProperty(OT.compound, compound); // First Individual feature1 = jenaModel.createIndividual("featureURI1", OT.OTClass.Feature.getOntClass(jenaModel)); Individual featureValue1 = jenaModel.createIndividual(OT.OTClass.FeatureValue.getOntClass(jenaModel)); featureValue1.addProperty(OT.feature, feature1); featureValue1.addLiteral(OT.value, jenaModel.createTypedLiteral("formaldehyde", XSDDatatype.XSDstring)); //Second value Individual feature2 = jenaModel.createIndividual("featureURI2", OT.OTClass.Feature.getOntClass(jenaModel)); Individual featureValue2 = jenaModel.createIndividual(OT.OTClass.FeatureValue.getOntClass(jenaModel)); featureValue2.addProperty(OT.feature, feature2); featureValue2.addLiteral(OT.value, jenaModel.createTypedLiteral(3.14, XSDDatatype.XSDdouble)); //and finally add values to the data entry dataEntry.addProperty(OT.values, featureValue1); dataEntry.addProperty(OT.values, featureValue2); return jenaModel; } public void write(OutputStream output) { MediaType mediaType = new MediaType(null); if (mediaType.equals(MediaType.APPLICATION_RDF_XML)) //jenaModel.write(output,"RDF/XML"); //this is faster { jenaModel.write(output, "RDF/XML-ABBREV"); //this is more readable } else if (mediaType.equals(MediaType.APPLICATION_RDF_XML)) { jenaModel.write(output, "TURTLE"); } else if (mediaType.equals(MediaType.TEXT_RDF_N3)) { jenaModel.write(output, "N3"); } else if (mediaType.equals(MediaType.TEXT_RDF_N3)) { jenaModel.write(output, "N-TRIPLE"); } else { jenaModel.write(output, "RDF/XML-ABBREV"); } } ; } OT.java
public class OT { public enum OTClass { Compound, Conformer, Dataset, DataEntry, Feature, FeatureValue, Algorithm, Model, Validation, ValidationInfo; public String getNS() { System.out.println("String.format(_NS, toString()) : " + String.format(_NS, toString())); return String.format(_NS, toString()); } public OntClass getOntClass(OntModel model) { return model.getOntClass(getNS()); } public OntClass createOntClass(OntModel model) { return model.createClass(getNS()); } public Property createProperty(OntModel model) { return model.createProperty(getNS()); } }; /** The RDF model that holds the vocabulary terms
*/ private static Model m_model = ModelFactory.createDefaultModel(); /** The namespace of the vocabalary as a string ({@value})
*/ protected static final String _NS = "http://www.opentox.org/api/1.1#%s"; public static final String NS = String.format(_NS, ""); public static String getURI() { return NS; } /** The namespace of the vocabalary as a resource
*/ public static final Resource NAMESPACE = m_model.createResource(NS); /** * Object properties */ public static final Property dataEntry = m_model.createProperty(String.format(_NS, "dataEntry")); public static final Property compound = m_model.createProperty(String.format(_NS, "compound")); public static final Property feature = m_model.createProperty(String.format(_NS, "feature")); public static final Property values = m_model.createProperty(String.format(_NS, "values")); public static final Property hasSource = m_model.createProperty(String.format(_NS, "hasSource")); public static final Property conformer = m_model.createProperty(String.format(_NS, "conformer")); public static final Property isA = m_model.createProperty(String.format(_NS, "isA")); public static final Property model = m_model.createProperty(String.format(_NS, "model")); public static final Property report = m_model.createProperty(String.format(_NS, "report")); public static final Property algorithm = m_model.createProperty(String.format(_NS, "algorithm")); public static final Property dependentVariables = m_model.createProperty(String.format(_NS, "dependentVariables")); public static final Property independentVariables = m_model.createProperty(String.format(_NS, "independentVariables")); public static final Property predictedVariables = m_model.createProperty(String.format(_NS, "predictedVariables")); public static final Property trainingDataset = m_model.createProperty(String.format(_NS, "trainingDataset")); public static final Property validationReport = m_model.createProperty(String.format(_NS, "validationReport")); public static final Property validation = m_model.createProperty(String.format(_NS, "validation")); public static final Property hasValidationInfo = m_model.createProperty(String.format(_NS, "hasValidationInfo")); public static final Property validationModel = m_model.createProperty(String.format(_NS, "validationModel")); public static final Property validationPredictionDataset = m_model.createProperty(String.format(_NS, "validationPredictionDataset")); public static final Property validationTestDataset = m_model.createProperty(String.format(_NS, "validationTestDataset")); /** * Data properties */ public static final Property value = m_model.createProperty(String.format(_NS, "value")); public static final Property units = m_model.createProperty(String.format(_NS, "units")); public static final Property has3Dstructure = m_model.createProperty(String.format(_NS, "has3Dstructure")); public static final Property hasStatus = m_model.createProperty(String.format(_NS, "hasStatus")); public static final Property paramScope = m_model.createProperty(String.format(_NS, "paramScope")); public static final Property paramValue = m_model.createProperty(String.format(_NS, "paramValue")); public static final Property statisticsSupported = m_model.createProperty(String.format(_NS, "statisticsSupported")); }
你可以帮忙吗？
你的问题不是很清楚。 如果您询问如何保存已创建的模型，则需要将其写入文件：
OntModel m = .... your model .... ; FileWriter out = null; try { // XML format - long and verbose out = new FileWriter( "mymodel.xml" ); m.write( out, "RDF/XML-ABBREV" ); // OR Turtle format - compact and more readable // use this variant if you're not sure which to use! out = new FileWriter( "mymodel.ttl" ); m.write( out, "Turtle" ); } finally { if (out != null) { try {out.close()} catch (IOException ignore) {} } }
有关编写RDF的更多详细信息，请参阅Jena文档 。
或者，如果您的问题是关于如何添加本体的实例，请参阅本体API文档中的示例。 作为提示，粗略地说，您希望获得与要创建以下实例的OWL类对应的OntClass对象：
OntModel m = ... your model ... ; String ns = "http://example.com/example#"; OntClass foo = m.getOntClass( ns + "Foo" ); Individual fubar = foo.createInstance( ns + "fubar" );
如果这不能解决您的问题，请更新您的问题并提供更多详细信息，最好是您已经尝试过的代码示例。
更新
好的，我已经看到了你的更新代码。 对于Protégé，您只需要用XML编写文件，这样就可以删除行来编写Turtle格式。 但你真正的问题是这样的行：
jenaModel.createIndividual("compoundURI" )
"compoundURI"不是有效的URI – 这是错误消息告诉您的内容。 您需要一个符合HTTP之类的有效URI方案的完整URI。 所以，像：
jenaModel.createIndividual( OT.NS + compoundURI );