Soprano (formally known as QRDF) is a library which provides a nice QT
interface to RDF storage solutions. It has a modular structure which allows to
replace the actual RDF storage implementation used. Currently two
implementations are working. The first and most important backend used in
Soprano is based on librdf, the Redland RDF Application Framework. The second
backend is the more interesting one as it uses the NEPOMUK-KDE backbone library
to connect to a NEPOMUK RDF triple service, thus providing a nice interface for
applications not aware of Nepomuk services.