Parameter objects with one or two-dimensional lookup tables possess the attribute LookupType. For these the following values are possible:

• "LinearInterpolation" (linear interpolation of the supporting values between two grid points) The default parameter "LinearInterpolation" will be used, if no Lookuptype attribute is set.
• "NearestNeighbour" (chooses the next possible supporting value to the recent grid point)
• "ConstantUntilThreshold" (maintains the current supporting value as long as the related grid point is not crossed).
• "SplineInterpolation" (cubic interpolation of the supporting values between two grid points. The transition of the supporting values at the grid points is smooth, i.e the first and second derivative of the function exist. .)