Package org.apache.lucene.facet.taxonomy

Taxonomy of Categories

Facets are defined using a hierarchy of categories, known as a Taxonomy
For example, in a book store application, a Taxonomy could have the following hierarchy:

  • Author
    • Mark Twain
    • J. K. Rowling
  • Date
    • 2010
    • 2009
The Taxonomy translates category-paths into category-ordinal and vice versa.