Floating tag

[Johnny John]

Hello-

I would like to use a single tag but move it along in time as my project 
progresses.  This is to keep track of growth of the trunk with respect to a 
branch.

Does the -F flag with cvs tag work?  where it forces re-assignment.  Does 
re-assignment automatically delete the first instance of a tag and then 
re-apply it at the new point?

thanks.
-Johnny.