On Fri, Oct 27, 2006 at 12:58:49PM +0100,
 Andy Shellam (Mailing Lists) <andy.shellam-lists@mailnetwork.co.uk> wrote 
 a message of 49 lines which said:
> However, if a machine changes it's IP address, I then have to
> remember to edit 2 records

If your zone file is maintained by hand, which is typically done only
for small and quite static zone files.

> Is there an easier way to do this, other than using double-A records?

Generating the zone file by program, from a higher-level description,
like h2n does.

In that case, a simple preprocessing with m4 or cpp is, IMHO, the way
to go.

As an illustration, I attached a source m4 file.