# Lucene 2.9.4 contrib-collation API

Packages
Package | Description
--- | ---
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.

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