| Customer | Primary and additional driver information.Information on the one primary driver and, optionally, several additional drivers. This may be used to provide a frequent renter number. |
 Errors | A collection of errors that occurred during the processing of a message.A collection of errors that occurred during the processing of a message. |
| POS | Describes the source of the transaction such as kiosk id or counter agent id.Point of Sale (POS) identifies the party or connection channel making the request. |
| Remarks | A collection of remarks. |
| Success | Returning an empty element of this type indicates the successful processing of an OpenTravel message. This is used in conjunction with the Warning Type to report any warnings or business errors.Returning an empty element of this type indicates the successful processing of an OpenTravel message. This is used in conjunction with the Warning Type to report any warnings or business errors. |
| VehAdditionalInfo | Identifies the supplemental information associated with the response for the checkout of a rental vehicle.The VehicleSegmentAdditionalInfoType complex type identifies the data that descibes the supplemental information assocated with a vehicle segment. Such information may be associated with the reservation of a vehicle, but is not normally included. |
| VehRentalTransaction | Vehicle rental transaction information such as pick up and return details, vehicle information, rental rates, proced equipment, fees, total charges, confirmation ID and contract ID.This contains the information typically used in a rental transaction, such as charges, contract number or pickup date/time. |
| Vendor | Vendor information such as company name, travel sector and division.Identifies a company by name. |
| Warnings | Collection of warnings.Collection of warnings. |
| 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. |
| RentalActionCode | Identifies the reason for the transaction. To specify the type of action requested when more than one function could be handled by the message. |
| RentalAgreementStatusCode | This is a code that represents the status of the rental agreement. Refer to the enumerated list and annotations for additional information. |