| AdjustmentDetails | Collection of adjustments. |
| ConfID | A confirmation number by which this reservation can be uniquely identified. In some cases the ConfID may be used in lieu of a ContractID, dependent on business needs.An identifier used to uniquely reference an object in a system (e.g. an airline reservation reference, customer profile reference, booking confirmation number, or a reference to a previous availability quote). |
| ContractID | A contract number by which this rental can be uniquely identified.An identifier used to uniquely reference an object in a system (e.g. an airline reservation reference, customer profile reference, booking confirmation number, or a reference to a previous availability quote). |
| Customer | This is the rental customer's information and typically is not needed to be passed in this message.Information on the one primary driver and, optionally, several additional drivers. This may be used to provide a frequent renter number. |
| ExchangeLocation | Location where the vehicle was exchanged. |
| ExchangeReason | Used to indicate reasons for vehicle exchange.An indication of a new paragraph for a sub-section of a formatted text message. |
| PickUpReturnDetails | Typically this is used to provide the actual return date, time, and location.The VehicleRentalCoreType complex type identifies the data that is common, or core, to almost every transaction associated with the rental of a vehicle. |
| 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. |
| TPA_Extensions | A placeholder in the schema to allow for additional elements and attributes to be included per Trading Partner Agreement (TPA).Allows extensions to be added to the OpenTravel specification per trading partner agreement. |
  Vehicle | Vehicle info including size, class, make/model, vehicle asset number, etc. This is the actual vehicle being returned and the actual vehicle being given to the customer in exchange. |
| 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. |
| ReqRespVersion | Used to request the version of the payload message desired for the response. |