Hello I am trying to compile kdelibs-4.6.5 on Archlinux x86 but I get this message:

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[ 19%] Built target nepomuk_automoc     
[ 19%] Generating ndo.h, ndo.cpp
"/usr/bin/onto2vocabularyclass(2633)" Soprano: "The namespace prefix in "ndo" was not declared."           
Error:  The namespace prefix in "ndo" was not declared.
"/usr/bin/onto2vocabularyclass(2633)" Soprano: "Parsing failed (3)": "turtle_qname_to_uri failed" (line: 48, column: -1)
Error:  turtle_qname_to_uri failed
Failed to parse file/usr/share/ontology/nepomuk/ndo.trig(Parsing failed (3): turtle_qname_to_uri failed (line: 48, column: -1))
make[2]: *** [nepomuk/ndo.h] Error 1
make[1]: *** [nepomuk/CMakeFiles/nepomuk.dir/all] Error 2
make: *** [all] Error 2

Can anybody give me some idea about how to solve the problem?

I have looked on the web about related or similar issues but I had not luck.

Thanks in advance

EDIT

I have a very similar issue by compilig kdebase-workspace-4.6.5

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[  5%] Built target kworkspace_automoc
[  5%] Generating activitymanager_interface.cpp, activitymanager_interface.h
[  5%] Generating nfo.h, nfo.cpp                                                                     
"/usr/bin/onto2vocabularyclass(5666)" Soprano: "The namespace prefix in "nfo" was not declared."           
Error:  The namespace prefix in "nfo" was not declared.
"/usr/bin/onto2vocabularyclass(5666)" Soprano: "Parsing failed (3)": "turtle_qname_to_uri failed" (line: 56, column: -1)
Error:  turtle_qname_to_uri failed
Failed to parse file/usr/share/ontology/nie/nfo.trig(Parsing failed (3): turtle_qname_to_uri failed (line: 56, column: -1))
make[2]: *** [libs/kworkspace/nfo.h] Error 1
make[1]: *** [libs/kworkspace/CMakeFiles/kworkspace.dir/all] Error 2
make: *** [all] Error 2

This should be a bug in the raptor2 library: http://bugs.librdf.org/mantis/view.php?id=451