# Lucene 9.10.0 facet API

Provides faceted indexing and search capabilities. Checkout Facet Userguide and Demo.

Packages
Package | Description
--- | ---
org.apache.lucene.facet | Faceted search.
org.apache.lucene.facet.facetset | Provides FacetSets faceting capabilities which allows users to facet on high dimensional field values.
org.apache.lucene.facet.range | Provides range faceting capabilities.
org.apache.lucene.facet.rangeonrange | Provides range on range faceting capabilities.
org.apache.lucene.facet.sortedset | Provides faceting capabilities over facets that were indexed with `SortedSetDocValuesFacetField`.
org.apache.lucene.facet.taxonomy | Taxonomy of Categories.
org.apache.lucene.facet.taxonomy.directory | Taxonomy index implementation using on top of a Directory.
org.apache.lucene.facet.taxonomy.writercache | Improves indexing time by caching a map of CategoryPath to their Ordinal.