| Name | Type | Cardinality | Description |
|---|---|---|---|
| end | EDate | 0..1 | End date. |
| start | EDate | 0..1 | Start date. |
| Name | Cardinality | Description |
|---|---|---|
| isEffective( date : EDate ) : EBoolean | 0..1 | Returns true if object is effective at given date. |
| isEffectiveNow( ) : EBoolean | 0..1 | Returns true if object is currently effective. |