 Account | Specifies an account code for which fares are requested. |
| Offer | Merchandising offers associated with the fare or traveler.A choice between specifying summary, priced or traveler purchased ancillary offers. |
 OriginDestinationInformation | Origin and Destination location as well as all fare related detail information required for fare display. |
| POS | Point of sale object.Point of Sale (POS) identifies the party or connection channel making the request. |
| SpecificFlightInfo | Specify actual airline, flight number, or booking class. |
| TravelerInfoSummary | Information regarding the numbers and types of passengers. |
| TravelPreferences | Contains travel preference information. |
| AvailableFlightsOnly | Include only flights with available booking codes (when True or when attribute not present). |
| DirectFlightsOnly | Request direct flights on between the given locations. |
| DisplayOrder | Specifies the order in which fare contracts should be returned.An indication of how information should be ordered (sorted) in the response message. |
| MaxResponses | A positive integer value that indicates the maximum number of responses desired in the return. |
| AltLangID | The alternate language for a customer or message encoded as ISO 639-3. |
| CorrelationID | Allows end-to-end correlation of log messages with the corresponding Web service message throughout the processing of the Web service message. |
| EchoToken | A reference for additional message identification, assigned by the requesting host system. |
| PrimaryLangID | The primary language preference for the message encoded as ISO 639-3. |
| RetransmissionIndicator | When true, indicates the message is being re-sent after a failure. |
| SequenceNmbr | The sequence number of the transaction assigned by the sending system for ordered message processing or message resynchronization. |
| Target | Test or Production target system indicator. |
| TargetName | The name of the Test or Production system. |
| TimeStamp | ISO 8601 encoded timestamp indicating the creation date and time of the message. |
| TransactionIdentifier | Unique identifier to relate all messages within a transaction (e.g. this would be sent in all request and response messages that are part of an on-going transaction). |
| TransactionStatusCode | This indicates where this message falls within a sequence of messages. |
| Version | The OpenTravel message version indicated by a decimal value. |