<domain type="kvm">

  <name>foo</name>

  <memory unit="KiB">1234</memory>

  <vcpu>3</vcpu>

  <features>

    <foo/>

    <bar/>

    <baz/>

  </features>

  <on_poweroff>restart</on_poweroff>

  <metadata>

    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">

      <libosinfo:os id="http://centos.org/centos/7"/>

    </libosinfo:libosinfo>

    <nova:instance xmlns:nova="http://openstack.org/nova/instance/1">

      <nova:flavor name="m1.small">

        <nova:memory>512</nova:memory>

        <nova:disk>10</nova:disk>

      </nova:flavor>

    </nova:instance>

    <boxes:gnome-boxes xmlns:boxes="https://wiki.gnome.org/Apps/Boxes">

      <os-state>installed</os-state>

    </boxes:gnome-boxes>

    <ns:foo xmlns:ns="http://bar"/>

    <ns:bar xmlns:ns="http://foo"/>

  </metadata>

</domain>