A slice of standing rib roast will include portions of the so-called "eye" of the rib, as well as the outer, fat-marbled muscle (spinalis dorsi) known as the "cap." The traditional preparation for a standing rib roast is to rub the outside of the roast with salt and seasonings and slow-roast with dry heat. It also may be grilled or cooked sous vide.
USDA The Food Standards and Labeling Policy Book Archived 2011-02-05 at the Wayback Machine pg. 154 https://www.fsis.usda.gov/OPPDE/larc/Policies/Labeling_Policy_Book_082005.pdf ↩