It is not an application, but a component which can be used by
developers within applications.
This is the KDE Meta Data library (not to confuse with KFileMetaData).
It consists of the following parts:
* The main resource handling centered around Nepomuk2::Resource;
* The handling of ontologies via classes in the Nepomuk2::Types namespace;
* The desktop Nepomuk2::Query API;
* nepomuk_facets;
* Several utility methods and classes.