simplest form;Line breeding is where both parents have the same grandparent,sire or dam
Inbreeding: is a father daughter/mother son mating,giving the same topline as the bottom line in the pedigree
Y.I.S Leeview
Not quite right, but I suppose on paper it could be seen as being correct, as it goes a lot deeper than that. For example, a dog produced by a grand parent to grand parent, can be, closer related genetically than a dog produced by a father to daughter mating..this is where everyone goes on to the internet to get the info on line and in-breeding