| Email | An email address associated with the reservation to be retrieved.Electronic email addresses, in IETF specified format. |
| PickUpLocation | A code to identify the pick up location, along with an optional code context.Code and optional string to describe a location point. |
 Remark | Free text description regarding the rental to be retrieved.An indication of a new paragraph for a sub-section of a formatted text message. |
| ReturnLocation | A code to identify the return location, along with an optional code context.Code and optional string to describe a location point. |
| SearchDateRange | Defines a date type and a date or date range for searching. |
| Telephone | A telephone number associated with the reservation. |
| 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. |
| VehPref | Indicates any preferences for the vehicle, such as type, class, transmission, air conditioning.The VehiclePrefType complex type defines the information that is used when defining a preference of a vehicle. |
| Vendor | The vendor with whom the reservation has been made.Identifies a company by name. |