Property Boost

Returns the field's index-time boost.

Only fields can have an index-time boost, if you want to simulate a "document boost", then you must pre-multiply it across all the relevant fields yourself.

The boost is used to compute the norm factor for the field. By default, in the ComputeNorm(FieldInvertState) method, the boost value is multiplied by the length normalization factor and then rounded by EncodeNormValue(Single) before it is stored in the index. One should attempt to ensure that this product does not overflow the range of that encoding.

It is illegal to return a boost other than 1.0f for a field that is not indexed (IsIndexed is false) or omits normalization values (OmitNorms returns true).