| AdditionalInfo | Identifies additional information for an extra. E.g. "Large", "Medium" or "Small" frame for a mountain bike. |
| Description | A description of the extra. |
| Name | The extra amenity name. |
| PartnerCode | The trading partner issued code that uniquely identifies the extra and is associated with the supplier code. |
| Quantity | The quantity of this extra that is/are available. |
| RequiredInd | If true, this extra is required to participate in the tour/ activity. |
| ReserveInd | If true, this extra may be reserved. |
| SupplierCode | The code issued by the supplier that uniquely identifies the extra. |