Description
Type: int
Defines applicable periods for interpolation.
Valid values:
- 
                0 = Initial
Interpolation is applicable to the initial period only. 
- 
                1 = Initial and final
Interpolation is applicable to the initial and final periods only. 
- 
                2 = Final
Interpolation is applicable to the final period only. 
- 
                3 = Any period
Interpolation is applicable to any non-standard period.