[[analysis-smartcn]]
=== Smart Chinese Analysis Plugin

The Smart Chinese Analysis plugin integrates Lucene's Smart Chinese analysis
module into elasticsearch.

It provides an analyzer for Chinese or mixed Chinese-English text. This
analyzer uses probabilistic knowledge to find the optimal word segmentation
for Simplified Chinese text. The text is first broken into sentences, then
each sentence is segmented into words.


[[analysis-smartcn-install]]
[float]
==== Installation

This plugin can be installed using the plugin manager:

[source,sh]
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sudo bin/elasticsearch-plugin install analysis-smartcn
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The plugin must be installed on every node in the cluster, and each node must
be restarted after installation.

This plugin can be downloaded for <<plugin-management-custom-url,offline install>> from
{plugin_url}/analysis-smartcn/analysis-smartcn-{version}.zip.

[[analysis-smartcn-remove]]
[float]
==== Removal

The plugin can be removed with the following command:

[source,sh]
----------------------------------------------------------------
sudo bin/elasticsearch-plugin remove analysis-smartcn
----------------------------------------------------------------

The node must be stopped before removing the plugin.

[[analysis-smartcn-tokenizer]]
[float]
==== `smartcn` tokenizer and token filter

The plugin provides the `smartcn` analyzer and `smartcn_tokenizer` tokenizer,
which are not configurable.

NOTE: The `smartcn_word` token filter and `smartcn_sentence` have been deprecated.
