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I think the second message is not required here. If nepomuk needs soprano it 
should fail with a message why (Nepomuk not found because soprano is missing) 
and myapp should say what missing myapp means for myapp. If Nepomuk is not 
found because nepomuk or soprano is missing is not interesting for myapp.

I hope that makes any sense :((

And there is the fact that the featuresummary makes only sense for optional 
dependencies. But i could do find_package(Nepomuk REQUIRED) and i think adding 
soprano the feature summary then and not Nepomuk( if myapp forgets it) is just 
confusing.

Mike