Question regarding dynamic updates

[Mike Diggins]

My DNS environment (BIND) consists of a Master Name Server which is 
updated via a Database. A web page allows for changes, which updates the 
database, and periodically the database is dumped out to zone files for 
named, which are read and propagated to my slaves via regular zone 
transfers.

My question is about transitioning to Dynamic updates, which I am not yet 
allowing. We have a number of zones, all updated through the Web interface 
I describe above. What happens if I want a client to be able to update one 
of those zones dynamically, while still updating all the static entries in 
the same zone, via the Web/Database and zone transfers? Is that even 
possible to update a zone this way, and allow dynamic updates? I can't 
seem to wrap my head around that. Can someone straighten me out?

-Mike