IBSimilarityFactory (Solr 8.5.1 API)

java.lang.Object
- org.apache.solr.schema.SimilarityFactory
- - org.apache.solr.search.similarities.IBSimilarityFactory

```
public class IBSimilarityFactory
extends SimilarityFactory
```
Factory for IBSimilarity
You must specify the implementations for all three components of the Information-Based model (strings).
1. distribution: Probabilistic distribution used to model term occurrence
  - LL: Log-logistic
  - SPL: Smoothed power-law
2. lambda: λ_w parameter of the probability distribution
  - DF: N_w/N or average number of documents where w occurs
  - TTF: F_w/N or average number of occurrences of w in the collection
3. normalization: Term frequency normalization
  Any supported DFR normalization listed in DFRSimilarityFactory
Optional settings:
- discountOverlaps (bool): Sets SimilarityBase.setDiscountOverlaps(boolean)
WARNING: This API is experimental and might change in incompatible ways in the next release.

- Field Summary
  - Fields inherited from class org.apache.solr.schema.SimilarityFactory
    CLASS_NAME, params
- Constructor Summary
  
  Constructors
  Constructor Description
  
  IBSimilarityFactory()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  org.apache.lucene.search.similarities.Similarity getSimilarity()
  
  void init(SolrParams params)
  - Methods inherited from class org.apache.solr.schema.SimilarityFactory
    getClassArg, getNamedPropertyValues, getParams
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - IBSimilarityFactory
```
public IBSimilarityFactory()
```
- Method Detail
  - init
```
public void init(SolrParams params)
```
    Overrides:
    
    init in class SimilarityFactory
  - getSimilarity
```
public org.apache.lucene.search.similarities.Similarity getSimilarity()
```
    Specified by:
    
    getSimilarity in class SimilarityFactory