# Lucene 2.9.4 contrib-collation API

Packages
org.apache.lucene.collation: `CollationKeyFilter` and `ICUCollationKeyFilter` convert each token into its binary `CollationKey` using the provided `Collator`, and then encode the `CollationKey` as a String using `IndexableBinaryStringTools`, to allow it to be stored as an index term.

Copyright © 2000-2011 Apache Software Foundation. All Rights Reserved.