Comment 4 for bug 505653

soprano-daemon now recommends virtuoso-server and virtuoso-drivers, but I think this is not enough as it will complain about virtuoso not being installed until it is installed.
As soprano is useless without virtuoso it should depend on it and not only recommend it.

Strigi and Nepomuk need virtuoso as soprano-backend, and Nepomuk is needed by Akonadi, so it seems quite logical not having to install virtuoso by hand