type ULimit = Double(Unit="µm", range=(0.0 ..])
type PMass = Double(Unit="U", range=[0.0 ..])

type ParametricDist = {
	AD_type: Integer(Unit="U", range=[1 ..]),
	AD_param1: Double(Unit="U", range=0),
	AD_param2: Optional( Double(Unit="U"))
}
type NumericDist = {
	AD_type: Integer(Unit="U"),
	AD_dist_classes: Integer(Unit="U", range=[1 ..]),
	AD_dist: (ULimit, PMass)[1 ..]/*,
    a : Variant*/
}