# Package org.apache.solr.search.similarities

Factories for various built-in Lucene ranking models.

See: Description

- Class Summary
  Class | Description
  --- | ---
  BM25SimilarityFactory | Factory for `BM25Similarity`
  ClassicSimilarityFactory | Factory for `ClassicSimilarity`
  DFISimilarityFactory | Factory for `DFISimilarity`
  DFRSimilarityFactory | Factory for `DFRSimilarity`
  IBSimilarityFactory | Factory for `IBSimilarity`
  LMDirichletSimilarityFactory | Factory for `LMDirichletSimilarity`
  LMJelinekMercerSimilarityFactory | Factory for `LMJelinekMercerSimilarity`
  SchemaSimilarityFactory | `SimilarityFactory` that returns a global `PerFieldSimilarityWrapper` that delegates to the field type, if it's configured.
  SweetSpotSimilarityFactory | Factory for `SweetSpotSimilarity`.

## Package org.apache.solr.search.similarities Description

Factories for various built-in Lucene ranking models.

See `org.apache.lucene.search.similarities` for more additional details.

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