libvirt users - Mar 2012 - virsh - specifying openvz vm sample in domain creation xml

Hello

I need to specify the "vm sample name" in domain creation xml. This is
the option which is provided to vzctl wtih  --config parameter,  I can 
see that in openvz_driver.c there is below code .....

if ((vmdef->profile && *(vmdef->profile))) {
         ADD_ARG_LIT("--config");
         ADD_ARG_LIT(vmdef->profile);
}

But i am not sure what to put in "domain creation xml" to avail that 
option ? I cant find anything about it in documentation or around google.

Regards

James