There's two mappings of hostpath to IDType and ID in the wild: - dockershim and dockerd-cri (implicitly via docker) use class/ID -- The only supported IDType in Docker is 'class'. -- https://github.com/aarnaud/k8s-directx-device-plugin generates this form - https://github.com/jterry75/cri (windows_port branch) uses IDType://ID -- hcsshim's CRI test suite generates this form `://` is much more easily distinguishable, so I've gone with that one as the generic separator, with `class/` as a special-case. Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>