# Lucene 10.0.0 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.