Are v-brake pads compatible with cantilever brakes I have a set of Avid Shorty 4 cantilever brakes, well two sets (front and back) and wish to upgrade the pads.

These are centre pull, linear pull brakes and have brake pads which are mounted from the centre, ie the post (which is threaded) is centred in the pad.

Looking for new pads I see that there is a much wider variety of v-brake pads than cantilever pads.  As v-brakes are a subset of cantilever brakes can I use v-brake blocks with my cantilever brakes?  I note these tend to have more brake pad at the back of the mounting post than at the front of the pad.

I would also like if possible cartridge mounted pads any recommendations would be much appreciated.

Thanks in advance.
Yes, they are interchangeable.