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it seems there is no part of the ovf standard that handles which type of bios there is (at least i could not find it). Every ovf/ova i tested either has no info about it, or has it in a vmware specific property which we parse here. Signed-off-by: Dominik Csapak <d.csapak@proxmox.com> Reviewed-by: Fiona Ebner <f.ebner@proxmox.com>