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<h2 class="title"><a id="analysis-custom-analyzer"></a>Custom Analyzer<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/2.1/docs/reference/analysis/analyzers/custom-analyzer.asciidoc">edit</a></h2>
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<p>An analyzer of type <code class="literal">custom</code> that allows to combine a <code class="literal">Tokenizer</code> with
zero or more <code class="literal">Token Filters</code>, and zero or more <code class="literal">Char Filters</code>. The
custom analyzer accepts a logical/registered name of the tokenizer to
use, and a list of logical/registered names of token filters.
The name of the custom analyzer must not start with "_".</p>
<p>The following are settings that can be set for a <code class="literal">custom</code> analyzer type:</p>
<div class="informaltable">
<table border="1" cellpadding="4px">
<colgroup>
<col class="col_1"/>
<col class="col_2"/>
</colgroup>
<thead>
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<th align="left" valign="top">Setting</th>
<th align="left" valign="top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="top"><p><code class="literal">tokenizer</code></p></td>
<td align="left" valign="top"><p>The logical / registered name of the tokenizer to use.</p></td>
</tr>
<tr>
<td align="left" valign="top"><p><code class="literal">filter</code></p></td>
<td align="left" valign="top"><p>An optional list of logical / registered name of token
filters.</p></td>
</tr>
<tr>
<td align="left" valign="top"><p><code class="literal">char_filter</code></p></td>
<td align="left" valign="top"><p>An optional list of logical / registered name of char
filters.</p></td>
</tr>
<tr>
<td align="left" valign="top"><p><code class="literal">position_increment_gap</code></p></td>
<td align="left" valign="top"><p>An optional number of positions to increment
between each field value of a field using this analyzer. Defaults to 100.
100 was chosen because it prevents phrase queries with reasonably large
slops (less than 100) from matching terms across field values.</p></td>
</tr>
</tbody>
</table>
</div>
<p>Here is an example:</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">index :
analysis :
analyzer :
myAnalyzer2 :
type : custom
tokenizer : myTokenizer1
filter : [myTokenFilter1, myTokenFilter2]
char_filter : [my_html]
position_increment_gap: 256
tokenizer :
myTokenizer1 :
type : standard
max_token_length : 900
filter :
myTokenFilter1 :
type : stop
stopwords : [stop1, stop2, stop3, stop4]
myTokenFilter2 :
type : length
min : 0
max : 2000
char_filter :
my_html :
type : html_strip
escaped_tags : [xxx, yyy]
read_ahead : 1024</pre>
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