<!-- Code generated from the comments of the ExportConfig struct in builder/virtualbox/common/export_config.go; DO NOT EDIT MANUALLY -->

- `format` (string) - Either ovf or ova, this specifies the output format
  of the exported virtual machine. This defaults to ovf.

- `export_opts` ([]string) - Additional options to pass to the [VBoxManage
  export](https://www.virtualbox.org/manual/ch09.html#vboxmanage-export).
  This can be useful for passing product information to include in the
  resulting appliance file. Packer JSON configuration file example:
  
  ```json
  {
    "type": "virtualbox-iso",
    "export_opts":
    [
      "--manifest",
      "--vsys", "0",
      "--description", "{{user `vm_description`}}",
      "--version", "{{user `vm_version`}}"
    ],
    "format": "ova",
  }
  ```
  
  A VirtualBox [VM
  description](https://www.virtualbox.org/manual/ch09.html#vboxmanage-export-ovf)
  may contain arbitrary strings; the GUI interprets HTML formatting. However,
  the JSON format does not allow arbitrary newlines within a value. Add a
  multi-line description by preparing the string in the shell before the
  packer call like this (shell `>` continuation character snipped for easier
  copy & paste):
  
  ```shell
  vm_description='some
  multiline
  description'
  
  vm_version='0.2.0'
  
  packer build \
      -var "vm_description=${vm_description}" \
      -var "vm_version=${vm_version}"         \
      "packer_conf.json"
  ```
