They are what to use for starting droplets with virsh,
but for making a cluster or "home cloud" with virtigo

When possible & sensible, use the same variable names as libvirt

virtigo needs to coordinate all the virtual machine
information centrally. The information in the libvirt xml
files are imported into these protobuf definitions and
passed around as protobufs

virtigo recreates the libvirt xml files and calls
'virsh create'

