Picture posting is enabled for all :)
Sorry to disagree with you barnowl, but a cordon has a single main stem and is grown at an angle of up to 45deg. The columns or minarettes seem to be the same type of thing, just grown vertically instead of at an angle. The advantage of the cordon is that the angle means the main stem can be longer for the same overall height. I imagine that cordons, Minarettes and columns would all be pruned in exactly the same way.