Ok so now that I have someone that understands what high white really is, I need to understand what exactly is a high white.

It is any misplaced white marking other than an unbroken solid hooded and a self correct (higher than berkshire)? I know that there are also exceptions with this such as variegated and dalmatian.

I guess you find out if the high white is recessive or dominant by breeding the high white to a self as the self is naturally dom?