Hello,
I have an issue with reading(*1) the OWL input file using following read()
method from the Model interface.
-
https://jena.apache.org/documentation/javadoc/jena/org/apache/jena/rdf/model/Model.html#read-java.lang.String-java.lang.String-
When an input OWL file has an ".owl" extension, but is in the different syntax
than RDF/XML (Turtle for example), an exception(*2) is thrown, even though I
use the second parameter of the method to define the syntax of the input file
as it is recommended in this tutorial:
-
http://jena.apache.org/documentation/io/rdf-input.html#example-1-common-usage
When I change the extension to ".ttl", everything runs fine, the OWL file is
valid. It's not a huge problem for me, right now I am using the InputStream
when reading the input OWL file. I was just curious - is that how it should
work? For me, it does not look like it works correctly, but maybe I have missed
something... (I am using Jena in version 3.8.0)
(*1) example source code using the read() method:
OntModel model = null;
try {
model = ModelFactory.createOntologyModel();
model.read("mrettl.owl", "TURTLE");
} catch (Exception e) {
e.printStackTrace();
}
(*2) thrown Exception:
org.apache.jena.riot.RiotException: [line: 1, col: 1 ] Content is not allowed
in prolog.
at
org.apache.jena.riot.system.ErrorHandlerFactory$ErrorHandlerStd.fatal(ErrorHandlerFactory.java:147)
at
org.apache.jena.riot.lang.ReaderRIOTRDFXML$ErrorHandlerBridge.fatalError(ReaderRIOTRDFXML.java:313)
at
org.apache.jena.rdfxml.xmlinput.impl.ARPSaxErrorHandler.fatalError(ARPSaxErrorHandler.java:47)
at
org.apache.jena.rdfxml.xmlinput.impl.XMLHandler.warning(XMLHandler.java:199)
at
org.apache.jena.rdfxml.xmlinput.impl.XMLHandler.fatalError(XMLHandler.java:229)
at
java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at
org.apache.jena.rdfxml.xmlinput.impl.RDFXMLParser.parse(RDFXMLParser.java:171)
at org.apache.jena.rdfxml.xmlinput.ARP.load(ARP.java:118)
at
org.apache.jena.riot.lang.ReaderRIOTRDFXML.parse(ReaderRIOTRDFXML.java:188)
at
org.apache.jena.riot.lang.ReaderRIOTRDFXML.read(ReaderRIOTRDFXML.java:86)
at org.apache.jena.riot.RDFParser.read(RDFParser.java:352)
at org.apache.jena.riot.RDFParser.parseURI(RDFParser.java:321)
at org.apache.jena.riot.RDFParser.parse(RDFParser.java:295)
at
org.apache.jena.riot.RDFParserBuilder.parse(RDFParserBuilder.java:500)
at org.apache.jena.riot.RDFDataMgr.parseFromURI(RDFDataMgr.java:890)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:221)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:190)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:120)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:111)
at
org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:76)
at org.apache.jena.rdf.model.impl.ModelCom.read(ModelCom.java:281)
at
org.apache.jena.ontology.impl.OntModelImpl.readDelegate(OntModelImpl.java:3091)
at
org.apache.jena.ontology.impl.OntModelImpl.read(OntModelImpl.java:2185)
at
org.apache.jena.ontology.impl.OntModelImpl.read(OntModelImpl.java:2148)
at testing.ReadTest.main(ReadTest.java:15)
Thanks,
Patrik
