Class DefaultSimilarity

Expert: Default scoring implementation.

Inheritance
System.Object
Similarity
DefaultSimilarity
Inherited Members
Namespace:
Assembly: Lucene.Net.NetCore.dll
Syntax
public class DefaultSimilarity : Similarity

Fields

Name Description
internalDiscountOverlaps

Properties

Name Description
DiscountOverlaps

Determines whether overlap tokens (Tokens with 0 position increment) are ignored when computing norm. By default this is false, meaning overlap tokens are counted just like non-overlap tokens.

WARNING: This API is new and experimental, and may suddenly change.

Methods

Name Description
ComputeNorm(String, FieldInvertState)

Implemented as state.getBoost()*lengthNorm(numTerms), where numTerms is Length if DiscountOverlaps is false, else it's Length

WARNING: This API is new and experimental, and may suddenly change.
Coord(Int32, Int32)

Implemented as overlap / maxOverlap.

Idf(Int32, Int32)

Implemented as log(numDocs/(docFreq+1)) + 1.

LengthNorm(String, Int32)

Implemented as 1/sqrt(numTerms).

QueryNorm(Single)

Implemented as 1/sqrt(sumOfSquaredWeights).

SloppyFreq(Int32)

Implemented as 1 / (distance + 1).

Tf(Single)

Implemented as sqrt(freq).