Basic panel and DNG files

Can someone explain to me why, when working on a .DNG file in LR4 (4.3, to be exact), your get a different set of sliders in the Basic panel than when you have, say, a .NEF file open? This is most puzzling, as I am working from Scott Kelby's book, which shows the Highlights, Vibrance, etc. sliders available with a sample .DNG file open, but when I open the same file,  in that panel I get Exposure, Fill light, etc. instead. If I then open a .NEF file, I get different sliders. Is this supposed to be this way? Confused...