[libvirt] virStorageVolCreateXMLFrom

[Kenneth Nagin]

I'd like to get a better understanding of the virStorageVolCreateXMLFrom
api Its name and signature imply that it is a cloning operation that copies
a volume from one location to another. Is this correct?
Assuming that the answer is yes I have few other questions:
Does it support remote copy of non-shared storage, e.g. from a http server?
Is there any thought about adding digest validation check, e.g. with a md5
digest?
Is copy-on-write cloning supported in this command?

Kenneth Nagin