 BaggageInfo | Specifies baggage information for each passenger checking in or the head of a baggage pool. |
| DocumentAndPrintInfo | Specifies print information that should be used by the receiver to print various Check-in documents. |
| FlightInfo | Identifies the flight segment(s) to be checked in. The carrier will determine how many segments are eligible for continued flight check in. This information applies to all passengers. |
| MessageFunction | Specifies the primary function(s) of a particular Check-in message. |
| Offer | Merchandising offers associated with the fare or traveler.A choice between specifying summary, priced or traveler purchased ancillary offers. |
| PassengerFlightInfo | Captures information for a specific passenger travelling on a specific flight or segment. |
 PassengerInfo | Specifies information related to the passenger checking in. |
| PaymentInfo | Captures payment information for services or fees not covered in the fare. |
| POS | Point of sale object.Point of Sale (POS) identifies the party or connection channel making the request. |