How do we specify disk device names for non-Linux VMs in XML?

The XML parser (or verifier) in libvirt seems to support only Linux device names for a disk, such as hda, sda and vda. Can anyone let us know how libvirt supports disk device names for non-Linux VMs? We are developing a new hypervisor driver for a non-Linux VM, which uses a different device naming convention from Linux, something like 0A80. 0A81, 0A82. Thank you so much. Motohiro Kawahito, Commercial Systems, IBM Research - Tokyo 19-21 Nihonbashi, Hakozaki-cho Chuo-ku, Tokyo 103-8510, Japan