Same as UnitOfMeasure.
Valid values:
| 'Bbl' | Barrels |
| 'Bcf' | Billion cubic feet |
| 'Bu' | Bushels |
| 'lbs' | pounds |
| 'Gal' | Gallons |
| 'MMbbl' | Million Barrels (deprecated in FIX 5.0 SP1) |
| 'MMBtu' | One Million BTU |
| 'MWh' | Megawatt hours |
| 'oz_tr' | Troy Ounces |
| 't' | Metric Tons (aka Tonne) |
| 'tn' | Tons (US) |
| 'USD' | US Dollars |
Used in: