| Description | Quantity description |
| EumQuantity | EumQuantity (item type and unit) |
| Id | ID of the quantity. The ID is unique for a specific type of quantity within MIKE 1D. Two quantities with different Ids are not equal to each other. |
| TimeValueType | Type of value in time stored by the quantity. |
| Undefined | Return a wuantity based on eumItem.eumIItemUndefined |