# Package org.apache.lucene.facet.index

Facets indexing code.

See: Description

- Interface Summary
  Interface | Description
  --- | ---
  CategoryListBuilder | Builds a category list data by encoding the appropriate information for every category and ordinal given to `CategoryListBuilder.build(IntsRef, Iterable)`.

- Class Summary
  Class | Description
  --- | ---
  CountingListBuilder | A `CategoryListBuilder` which builds a counting list data by encoding the category ordinals into one or more `BytesRef`.
  DrillDownStream | A `TokenStream` which creates category drill-down terms.
  FacetFields | A utility class for adding facet fields to a document.

## Package org.apache.lucene.facet.index Description

Facets indexing code.

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