[Nepomuk] Problem when storing properties with the DMS

[Christian Mollekopf]

Hey,

Today I faced a problem when setting the nie:isPartOf property on a  
SimpleResource item.
In the akonadi feeder storing would always fail with a message like:
"http://www.semanticdesktop.org/ontologies/2007/01/19/nie#isPartOf has a  
rdfs:range of  
http://www.semanticdesktop.org/ontologies/2007/01/19/nie#InformationElement."

which is at least a correct statement, but I made sure that all resources  
have the types informationelement and DataObject, so it should work.

Second I wrote a little test app:

     SimpleResourceGraph graph;
     SimpleResource res;
     res.setProperty( Soprano::Vocabulary::NAO::prefLabel(), "testresource"  
);
     res.setTypes(QList <QUrl>() << Vocabulary::NIE::DataObject() <<  
Vocabulary::NIE::InformationElement());
     graph.insert(res);
     SimpleResource res2;
     res2.setProperty( Soprano::Vocabulary::NAO::prefLabel(),  
"testresource2" );
     res2.setTypes(QList <QUrl>() << Vocabulary::NIE::DataObject() <<  
Vocabulary::NIE::InformationElement());
     res2.addProperty( Vocabulary::NIE::isPartOf(), res );
     graph.insert(res2);
     KJob *job = graph.save();

This actually worked without errors, but the property ended up on the  
wrong resource (testresource instead of tesetresource2).
Vishesh had a quick look at this one.

He then put this into a unittest in datamanagementmodeltest.cpp, here we  
both experienced the same issue:

QDEBUG : DataManagementModelTest::testStoreResource_nieIsPartOf()  
qttest(30079)/nepomuk (storage service) Nepomuk::ResourceMerger::merge:  
Invalid resource range.  QUrl( "_:zb" )  has types  
(QUrl("http://www.semanticdesktop.org/ontologies/2007/01/19/nie#DataObject")  
,   QUrl(  
"http://www.semanticdesktop.org/ontologies/2007/01/19/nie#InformationElement"  
)  )
QDEBUG : DataManagementModelTest::testStoreResource_nieIsPartOf()  
"/home/chrigi/devel/kde/build/kde-runtime/nepomuk/services/storage/test/datamanagementmodeltest(30079)"  
Soprano: "Invalid argument (1)":  
"http://www.semanticdesktop.org/ontologies/2007/01/19/nie#isPartOf has a  
rdfs:range of  
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#FileDataObject."
QDEBUG : DataManagementModelTest::testStoreResource_nieIsPartOf()  
qttest(30079)/nepomuk (storage service)  
Nepomuk::DataManagementModel::storeResources:  MERGING FAILED!
QDEBUG : DataManagementModelTest::testStoreResource_nieIsPartOf()  
"/home/chrigi/devel/kde/build/kde-runtime/nepomuk/services/storage/test/datamanagementmodeltest(30079)"  
Soprano: "Invalid argument (1)":  
"http://www.semanticdesktop.org/ontologies/2007/01/19/nie#isPartOf has a  
rdfs:range of  
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#FileDataObject."

The reported range is actually wrong, as nie:isPartOf has a range of  
nie:InformationElement, and not nie:DataObject (repectively  
nfo:FileDataObject).

Here are the tests I used: http://paste.kde.org/86809/
The first one doesn't work it seems. It is very well possible that it is  
also not supposed to work this way.

Anyways, I'm stuck, any help appreciated =)

Cheers,

Chris