There is nothing special about annotation properties as far as low level
calls like listStatements is concerned.
The chances are that your imports are simply not working at all.
Since the mail list doesn't support attachments we can't see the
details. Your code fragment doesn't set up any file locators or
OntDocumentManager so your import statement will be loading from the
import URL, not from a local file. Does that URL resolve to the file you
expect it to?
If you can't debug this then cut your two ontologies down to minimal
complete examples which would then be short enough to go in line in a
message or on a pastebin service.
Dave
On 31/07/13 15:12, Ed Swing wrote:
I believe I have found a bug in importing ontologies and annotations.
Specifically, annotation property values are not included when an
ontology is imported.
Included in this post are two ontologies, luminary.owl and
terrorism.owl. The ontology luminary.owl includes the following
annotation property declaration:
<owl:AnnotationProperty rdf:about="#directive">
<rdfs:comment>Directives indicate how a class or property
should be handled</rdfs:comment>
</owl:AnnotationProperty>
This annotation property is used on one datatype property and one class
in the luminary.owl ontology, and Jena recognizes this. However, the
luminary.owl ontology is specifically imported (using owl:import), but
these annotations disappear. Other annotations in the terrorism ontology
do appear. To test this, I ran the following Java class:
import java.io.FileInputStream;
import java.io.IOException;
import com.hp.hpl.jena.ontology.OntModel;
import com.hp.hpl.jena.ontology.OntModelSpec;
import com.hp.hpl.jena.rdf.model.*;
public class DirectiveTest {
/**
* TODO: DOCUMENT ME
*
* @param args
*/
public static void main(String[] args) throws IOException {
if (args.length > 0) {
OntModel m =
ModelFactory
.createOntologyModel(OntModelSpec.OWL_DL_MEM_RULE_INF);
FileInputStream inStream = new FileInputStream(args[0]);
m.read(inStream, null);
inStream.close();
for (StmtIterator stIter =
m.listStatements(null, null, (RDFNode) null);
stIter.hasNext();) {
Statement stmt = stIter.next();
if (stmt.toString().contains("directive")) {
System.out.println(stmt);
}
}
}
}
}
On the Luminary ontology, it outputs the following, showing that the
directive annotation is recognized on the DatatypeProperty and Class:
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/1999/02/22-rdf-syntax-ns#type,
http://www.w3.org/1999/02/22-rdf-syntax-ns#Property]
[http://luminary.unx.sas.com/luminary#Message,
http://luminary.unx.sas.com/luminary#directive, "Test"]
[http://luminary.unx.sas.com/luminary#hasDescription,
http://luminary.unx.sas.com/luminary#directive, "TextField"]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/2000/01/rdf-schema#comment, "Directives indicate how a
class or property should be handled"]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/1999/02/22-rdf-syntax-ns#type,
http://www.w3.org/2002/07/owl#AnnotationProperty]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/2000/01/rdf-schema#subPropertyOf,
http://luminary.unx.sas.com/luminary#directive]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/1999/02/22-rdf-syntax-ns#type,
http://www.w3.org/2000/01/rdf-schema#Resource]
However, when I run the same code on the terrorism ontology, the
annotations in terrorism.owl do appear, but those in luminary.owl do
not. I would expect that since the ontology is specifically imported,
all directives would appear. Instead, I get the following results:
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/1999/02/22-rdf-syntax-ns#type,
http://www.w3.org/1999/02/22-rdf-syntax-ns#Property]
[http://luminary.unx.sas.com/bls#Event,
http://luminary.unx.sas.com/luminary#directive, "Abstract"]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/2000/01/rdf-schema#comment, "Directives indicate how a
class or property should be handled"]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/1999/02/22-rdf-syntax-ns#type,
http://www.w3.org/2002/07/owl#AnnotationProperty]
[http://luminary.unx.sas.com/luminary#Event,
http://luminary.unx.sas.com/luminary#directive, "Abstract"]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/2000/01/rdf-schema#subPropertyOf,
http://luminary.unx.sas.com/luminary#directive]
[http://luminary.unx.sas.com/luminary#directive,
http://www.w3.org/1999/02/22-rdf-syntax-ns#type,
http://www.w3.org/2000/01/rdf-schema#Resource]
I would understand an annotation not being included with just a
namespace reference. But with a specific owl:import, I'd expect that the
annotations would also be included.
*Edward Swing*
*Applied Research Technologist*
*Vision Systems + Technology, Inc., a SAS Company*
6021 University Boulevard • Suite 360 • Ellicott City • Maryland • 21043
*Tel:*410.418.5555 *Ext:*919 • *Fax:*410.418.8580
*Email*:[email protected] <mailto:[email protected]>
*Web:*http://www.vsticorp.com <http://www.vsticorp.com/>
