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.. -*- rst -*-
.. groonga-command
.. database: tokenizers
.. _token-trigram:
``TokenTrigram``
================
Summary
-------
``TokenTrigram`` is similar to :ref:`token-bigram`. The differences
between them is token unit.
Syntax
------
``TokenTrigram`` hasn't parameter::
TokenTrigram
Usage
-----
If normalizer is used, ``TokenTrigram`` uses white-space-separate like
tokenize method for ASCII characters. ``TokenTrigram`` uses trigram
tokenize method for non-ASCII characters.
If ``TokenTrigram`` tokenize non-ASCII charactors, ``TokenTrigram`` uses
3 character per token as below example.
.. groonga-command
.. include:: ../../example/reference/tokenizers/token-trigram-non-ascii.log
.. tokenize TokenTrigram "日本語の勉強" NormalizerAuto
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