this manual is quite good at explaining the various parameters and processes in general, even though it is specific for Raw Therapee.
worth a read
http://rawtherapee.googlecode.com/hg/doc/built/pdf/en/RawTherapeeManual_4.0.7.pdf
worth a read
http://rawtherapee.googlecode.com/hg/doc/built/pdf/en/RawTherapeeManual_4.0.7.pdf