Index - O
| okData | Duckling.Ranking.Types |
| oneOf | Duckling.Numeral.Helpers |
| Open | Duckling.Time.Types |
| openInterval | Duckling.Time.Types |
| OpenIntervalValue | Duckling.Time.Types |
| Ordinal | Duckling.Dimensions.Types, Duckling.Core |
| ordinal | Duckling.Ordinal.Helpers |
| OrdinalData | |
| 1 (Type/Class) | Duckling.Ordinal.Types |
| 2 (Data Constructor) | Duckling.Ordinal.Types |