Type of the additional data. Possible types are:

POD_SIGNATURE	Signature of a consignee, usually available on delivery events.
MISCELLANEOUS	General additional information, notes or fields with value. It is possible to have more than one field of this type if there are different texts.
MASTER_AIRWAYBILL_NUMBER	This tracking number identifies the cargo of a complete aircraft.
HOUSE_AIRWAYBILL_NUMBER	This tracking number identifies a single shipping order.
PORT_OF_LOADING_CODE	Port or airport code where the goods are loaded.
PORT_OF_DISCHARGE_CODE	Port or airport code where the goods are unloaded.
AIRLINE	The airline is a company that transports people or freight against payment.
FLIGHT_NUMBER	The flight number is an ordinal number that is used to identify a specific flight connection of an airline.
SCHENKERAIR_SST_NUMBER	Schenker Air specific type: SST number
HOUSE_BILL_OF_LADING_NUMBER	EDIFACT qualifier BH, reference number assigned to a house bill of lading.
IMPORTER_REFERENCE_NUMBER	EDIFACT qualifier ABQ
PRIMARY_REFERENCE	EDIFACT qualifier AES
SHIPMENT_REFERENCE_NUMBER	The shipment reference number. When tracking is on shipment, this might be the tracking number.
HOUSE_SHIPMENT_REFERENCE	The house shipment reference number.
CARRIER_NOTE	Note by the carrier.
CONTAINER_NUMBER	The container number.
VESSEL_NAME	The vessel name can be used to identify a specific vessel.
VOYAGE_NUMBER	The voyage number is an ordinal number that is used to identify a specific voyage of a vessel.
ETA	The ETA is a string containing a date/timestamp of the estimated time of arrival. The format of the string is based on the ISO 8601 standard and depends on the information provided by the carrier. It contains either, a date, a date time or a date time with time zone information. Example: 2021-11-30T13:37:01.87+01:00[Europe/Berlin].
TRANSPORT_TYPE	The transport type