| Name | Description | Type | Package | Framework |
| CachedOrdinalsReader | A per-segment cache of documents' facet ordinals. | Class | org.apache.lucene.facet.taxonomy | Apache Lucene |
| CachedOrdinalsReader .CachedOrds | Holds the cached ordinals in two parallel int[] arrays. | Class | org.apache.lucene.facet.taxonomy.CachedOrdinalsReader | Apache Lucene |