What is a "BARF" or "RMBD" diet for dogs?

Canine Journal
Bones and Raw Food (“BARF”) and Raw-meats Based Diets (“RMBD”) diets are all about fulfilling the basic dietary needs by replicating a dog’s natural diet if she were to live off of the land.
BARF and RMBD diets are nutritionally superior, assisting in tooth health, digestion, bones, and immune function.