Is there a way to compare what is in the ports tree with what is installed?

[RW]

On Mon, 05 Nov 2007 14:53:48 +1300
Brett Davidson <brett at net24.co.nz> wrote:

> ie. If I had a particular version of the ports tree on a server, how 
> could I check to see if any of the programs in that tree were
> actually installed?
> 
> Is there a simple command or sequence of commands to do this?
> 
see pkg_version[1]