SWI-Prolog: how to save knowledge base?

From: Christian Heinze (171179_at_web.de)
Date: 12/16/04 

Date: Thu, 16 Dec 2004 11:46:09 +0100

Hello,

one teacher at my university strongly considers switching to SWI-Prolog
as teaching-Prolog-system. There're some differences between SWI and the
formerly used Prolog systems, namely Visual Prolog. One question I'd
like to ask on his behalf:

After a knowledge database has been dynamically altered, say by 'assert'
or 'retract', how is it possible to permanently store the database in
its altered way?

Thanks you, greetings
Christian Heinze