# Uses of Class
org.apache.lucene.search.similarities.Distribution

Packages that use Distribution
Package
Description
org.apache.lucene.search.similarities
This package contains the various ranking models that can be used in Lucene.

## Uses of Distribution in org.apache.lucene.search.similarities

Subclasses of Distribution in org.apache.lucene.search.similarities
Modifier and Type
Class
Description
`class`
`DistributionLL`
Log-logistic distribution.
`class`
`DistributionSPL`
The smoothed power-law (SPL) distribution for the information-based framework that is described in the original paper.
Fields in org.apache.lucene.search.similarities declared as Distribution
Modifier and Type
Field
Description
`protected final Distribution`
IBSimilarity.`distribution`
The probabilistic distribution used to model term occurrence.
Methods in org.apache.lucene.search.similarities that return Distribution
Modifier and Type
Method
Description
`Distribution`
IBSimilarity.`getDistribution()`
Returns the distribution
Constructors in org.apache.lucene.search.similarities with parameters of type Distribution
Modifier
Constructor
Description
``
`IBSimilarity(Distribution distribution, Lambda lambda, Normalization normalization)`
Creates IBSimilarity from the three components and using default discountOverlaps value.
``
`IBSimilarity(Distribution distribution, Lambda lambda, Normalization normalization, boolean discountOverlaps)`
Creates IBSimilarity from the three components and with the specified discountOverlaps value.