its just measurements in centimeters, relative to like midsole (recommended on most skis) or true center. + is forward, - is back.
"This is a hybrid. This is a cross, ah, of Bluegrass, Kentucky Bluegrass, Featherbed Bent, and Northern California Sensemilia. The amazing stuff about this is, that you can play 36 holes on it in the afternoon, take it home and just get stoned to the bejeezus-belt that night on this stuff. "