o  robot_info - This is the address of a robot_info_t structure
       initialized using mrd_startup(3mrd) or mrd_show(3mrd). This
       data structure contains the element starting address and
       counts for each type of element, which are needed to map an
       absolute element to the correct zero relative address and
       type.

    o  transport - The transport is the numeric value of the
       transport which will be moved.

    o  source - The source is an absolute element address.

    o  destination- The destination is an absolute element address.

    o  invert - The invert is a numeric value used to indicate if the
       medium should be inverted when it is moved. A value of one (1)
       is used to indicate that the medium should be inverted.

    o  dev_status - The dev_status is the address of a dev_status_
       t structure, which is used to pass back detailed error
       information in the event of a command failure.