Oracle XE on multiple virtual machines on the same physical machine?

hi,
does oracle's licensing for 11g express edition prohibit running XE databases on multiple virtual machines on the same physical machine? if not, does the machine have to be "hard partitioned" per oracle specifications (link below) to make it legal?
http://www.oracle.com/us/corporate/pricing/partitioning-070609.pdf
i found a similar question regarding 10g express edition in the forum (link below), but it doesn't seem like the question was ever definitively answered.
Oracle XE on multiple virtual machines on the same physical machine?
thanks

I thought until I just checked that this was a clear cut no in that it specifies 'a single server'. Now I'm not sure as 'server' is an amibuous term. I at least know that as soon as you start giving developers access to theor own XE instance for dev/testing that there are many VM environments where you can't really know what physical macine your VM is running on to actually be able to tell if you had multiple XE instances running on a single 'Physical' server. I'm not sure the question has been answered by Oracle though.

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