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<h2 class="title"><a id="analysis-simplepatternsplit-tokenizer"></a>Simple Pattern Split Tokenizer<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/6.0/docs/reference/analysis/tokenizers/simplepatternsplit-tokenizer.asciidoc">edit</a></h2>
</div></div></div>
<div class="warning admon">
<div class="icon"></div>
<div class="admon_content">
<p>This functionality is marked as experimental in Lucene</p>
</div>
</div>
<p>The <code class="literal">simple_pattern_split</code> tokenizer uses a regular expression to split the
input into terms at pattern matches. The set of regular expression features it
supports is more limited than the <a class="xref" href="analysis-pattern-tokenizer.html" title="Pattern Tokenizer"><code class="literal">pattern</code></a>
tokenizer, but the tokenization is generally faster.</p>
<p>This tokenizer does not produce terms from the matches themselves. To produce
terms from matches using patterns in the same restricted regular expression
subset, see the <a class="xref" href="analysis-simplepattern-tokenizer.html" title="Simple Pattern Tokenizer"><code class="literal">simple_pattern</code></a>
tokenizer.</p>
<p>This tokenizer uses <a href="http://lucene.apache.org/core/7_0_1/core/org/apache/lucene/util/automaton/RegExp.html" class="ulink" target="_top">Lucene regular expressions</a>.
For an explanation of the supported features and syntax, see <a class="xref" href="query-dsl-regexp-query.html#regexp-syntax" title="Regular expression syntax">Regular Expression Syntax</a>.</p>
<p>The default pattern is the empty string, which produces one term containing the
full input. This tokenizer should always be configured with a non-default
pattern.</p>
<h3><a id="_configuration_21"></a>Configuration<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/6.0/docs/reference/analysis/tokenizers/simplepatternsplit-tokenizer.asciidoc">edit</a></h3>
<p>The <code class="literal">simple_pattern_split</code> tokenizer accepts the following parameters:</p>
<div class="informaltable">
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<col/>
<col/>
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<code class="literal">pattern</code>
</p>
</td>
<td valign="top">
<p>
A <a href="http://lucene.apache.org/core/7_0_1/core/org/apache/lucene/util/automaton/RegExp.html" class="ulink" target="_top">Lucene regular expression</a>, defaults to the empty string.
</p>
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<h3><a id="_example_configuration_13"></a>Example configuration<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/6.0/docs/reference/analysis/tokenizers/simplepatternsplit-tokenizer.asciidoc">edit</a></h3>
<p>This example configures the <code class="literal">simple_pattern_split</code> tokenizer to split the input
text on underscores.</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT my_index
{
"settings": {
"analysis": {
"analyzer": {
"my_analyzer": {
"tokenizer": "my_tokenizer"
}
},
"tokenizer": {
"my_tokenizer": {
"type": "simple_pattern_split",
"pattern": "_"
}
}
}
}
}
POST my_index/_analyze
{
"analyzer": "my_analyzer",
"text": "an_underscored_phrase"
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/1086.console"></div>
<p>The above example produces these terms:</p>
<div class="pre_wrapper lang-text">
<pre class="programlisting prettyprint lang-text">[ an, underscored, phrase ]</pre>
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