[[analysis-stempel]]
=== Stempel Polish Analysis Plugin

The Stempel Analysis plugin integrates Lucene's Stempel analysis
module for Polish into elasticsearch.

It provides high quality stemming for Polish, based on the
http://www.egothor.org/[Egothor project].

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

This plugin can be installed using the plugin manager:

[source,sh]
----------------------------------------------------------------
sudo bin/elasticsearch-plugin install analysis-stempel
----------------------------------------------------------------

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-stempel/analysis-stempel-{version}.zip.

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

The plugin can be removed with the following command:

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

The node must be stopped before removing the plugin.

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

The plugin provides the `polish` analyzer and `polish_stem` token filter,
which are not configurable.
