Multi-codename Debian archives: how to uniquify packages?

[John Morris <john@zultron.com>]

[Apologies if this is the wrong list; feel free to slap me in the right 
direction]

I'm setting up a Debian package archive to contain packages that must be 
built separately for wheezy and jessie.

Is there a Debian convention for adding the codename to the package 
version to prevent conflicting package file names?  I found 
documentation of such a convention for Ubuntu, where e.g. '~precise1' is 
appended to the version, but that looks peculiar to Ubuntu.  What do we 
do in Debian?

Thanks-

	John