| Code | Any code used to specify an item, for example, type of traveler, service code, room amenity, etc. |
| CodeContext | Identifies the source authority for the code. |
| Quantity | Used to define the quantity for an associated element or attribute. |
| SecondaryCode | An additional attribute to allow flexibility for particular organizations who require an additional code. |
| SupplierCode | An additional attribute to allow flexibility for particular organizations who require an additional supplier code.Used for an Alpha String, length 1 to 3 (for letter codes). |
| URI | Identifies the location of the code table. |