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[[index-modules-analysis]]
== Analysis
The index analysis module acts as a configurable registry of Analyzers
that can be used in order to both break indexed (analyzed) fields when a
document is indexed and process query strings. It maps to the Lucene
`Analyzer`.
Analyzers are (generally) composed of a single `Tokenizer` and zero or
more `TokenFilters`. A set of `CharFilters` can be associated with an
analyzer to process the characters prior to other analysis steps. The
analysis module allows one to register `TokenFilters`, `Tokenizers` and
`Analyzers` under logical names that can then be referenced either in
mapping definitions or in certain APIs. The Analysis module
automatically registers (*if not explicitly defined*) built in
analyzers, token filters, and tokenizers.
See <<analysis>> for configuration details.
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