the scrapper 6 is a full flat grind fixed blade.
with the full flat grind, there are 2 seperate bevels on the knife, the main primary bevel that makes up most of the visible surface of the knife, and the cutting edge bevel, wich is what you grind on to sharpen the knife.
on most knives, these are 2 completely seperate flat surfaces, that have a line that meets at an obtuse angle where the primary bevel meets the cutting edge bevel.
on a zero ground knife, wich can mean one of 2 things, there is no angle between the two, it is convex ground so that it is a smooth round transition.
that is one type, where it is convexed for a smooth transition. the other is a puuko style zero edge grind, wich is where the entire primary bevel is sharpened to sharpen the edge of the knife. sort of as though the cutting edge bevel was extended out much farther then normal.
on busse knives, you'll see the convexed type of "zero edge".