You need to take care of only two parameters ID and VNC port, other things will remain. If you want to put different path for disk you can do that as well. API is already available to define by you own xml.
Even if you don't modify the id/vnc it doesn't matter, everything is taken care by libvirt.
On Thu, 2008-08-14 at 01:04 +0200, Stefan de Konink wrote: 
I would like to reuse configurations that have been edited using the
libvirt api. For example by attaching interfaces.

Now the output that dumpxml generates, is very 'specific' to an active
configuration. I am not able to use a stored configuration from an active
domain to redefine it after it has been undefined. Is there a trick to do
so? Or should one really strip all 'live' attributes first?


Stefan

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--Ajish