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<li class="nav-item nav-item-this"><a href=""><span class="section-number">7.8.10. </span><code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code></a></li>
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<div class="section" id="tokendelimit">
<span id="token-delimit"></span><h1><span class="section-number">7.8.10. </span><code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code><a class="headerlink" href="#tokendelimit" title="Permalink to this headline">¶</a></h1>
<div class="section" id="summary">
<h2><span class="section-number">7.8.10.1. </span>Summary<a class="headerlink" href="#summary" title="Permalink to this headline">¶</a></h2>
<p><code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code> extracts token by splitting one or more space
characters (<code class="docutils literal notranslate"><span class="pre">U+0020</span></code>). For example, <code class="docutils literal notranslate"><span class="pre">Hello</span> <span class="pre">World</span></code> is tokenized to
<code class="docutils literal notranslate"><span class="pre">Hello</span></code> and <code class="docutils literal notranslate"><span class="pre">World</span></code>.</p>
<p><code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code> is suitable for tag text. You can extract <code class="docutils literal notranslate"><span class="pre">groonga</span></code>
and <code class="docutils literal notranslate"><span class="pre">full-text-search</span></code> and <code class="docutils literal notranslate"><span class="pre">http</span></code> as tags from <code class="docutils literal notranslate"><span class="pre">groonga</span>
<span class="pre">full-text-search</span> <span class="pre">http</span></code>.</p>
</div>
<div class="section" id="syntax">
<h2><span class="section-number">7.8.10.2. </span>Syntax<a class="headerlink" href="#syntax" title="Permalink to this headline">¶</a></h2>
<p><code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code> has optional parameter.</p>
<p>No options(Extracts token by splitting one or more space characters (<code class="docutils literal notranslate"><span class="pre">U+0020</span></code>)):</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>TokenDelimit
</pre></div>
</div>
<p>Specify delimiter:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>TokenDelimit("delimiter", "delimiter1", delimiter", "delimiter2", ...)
</pre></div>
</div>
<p>Specify delimiter with regular expression:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>TokenDelimit("pattern", pattern)
</pre></div>
</div>
<p>The <code class="docutils literal notranslate"><span class="pre">delimiter</span></code> option and a <code class="docutils literal notranslate"><span class="pre">pattern</span></code> option are not use at the same time.</p>
</div>
<div class="section" id="usage">
<h2><span class="section-number">7.8.10.3. </span>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2>
</div>
<div class="section" id="simple-usage">
<h2><span class="section-number">7.8.10.4. </span>Simple usage<a class="headerlink" href="#simple-usage" title="Permalink to this headline">¶</a></h2>
<p>Here is an example of <code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code>:</p>
<p>Execution example:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>tokenize TokenDelimit "Groonga full-text-search HTTP" NormalizerAuto
# [
# [
# 0,
# 1337566253.89858,
# 0.000355720520019531
# ],
# [
# {
# "position": 0,
# "force_prefix": false,
# "value": "groonga"
# },
# {
# "position": 1,
# "force_prefix": false,
# "value": "full-text-search"
# },
# {
# "position": 2,
# "force_prefix": false,
# "value": "http"
# }
# ]
# ]
</pre></div>
</div>
<p><code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code> can also specify options.
<code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code> has <code class="docutils literal notranslate"><span class="pre">delimiter</span></code> option and <code class="docutils literal notranslate"><span class="pre">pattern</span></code> option.</p>
<p><code class="docutils literal notranslate"><span class="pre">delimiter</span></code> option can split token with a specified character.</p>
<p>For example, <code class="docutils literal notranslate"><span class="pre">Hello,World</span></code> is tokenized to <code class="docutils literal notranslate"><span class="pre">Hello</span></code> and <code class="docutils literal notranslate"><span class="pre">World</span></code>
with <code class="docutils literal notranslate"><span class="pre">delimiter</span></code> option as below.</p>
<p>Execution example:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>tokenize 'TokenDelimit("delimiter", ",")' "Hello,World"
# [
# [
# 0,
# 1337566253.89858,
# 0.000355720520019531
# ],
# [
# {
# "value": "Hello",
# "position": 0,
# "force_prefix": false,
# "force_prefix_search": false
# },
# {
# "value": "World",
# "position": 1,
# "force_prefix": false,
# "force_prefix_search": false
# }
# ]
# ]
</pre></div>
</div>
<p><code class="docutils literal notranslate"><span class="pre">pattern</span></code> option can split token with a regular expression.
You can except needless space by <code class="docutils literal notranslate"><span class="pre">pattern</span></code> option.</p>
<p>For example, <code class="docutils literal notranslate"><span class="pre">This</span> <span class="pre">is</span> <span class="pre">a</span> <span class="pre">pen.</span> <span class="pre">This</span> <span class="pre">is</span> <span class="pre">an</span> <span class="pre">apple</span></code> is tokenized to <code class="docutils literal notranslate"><span class="pre">This</span> <span class="pre">is</span> <span class="pre">a</span> <span class="pre">pen</span></code> and
<code class="docutils literal notranslate"><span class="pre">This</span> <span class="pre">is</span> <span class="pre">an</span> <span class="pre">apple</span></code> with <code class="docutils literal notranslate"><span class="pre">pattern</span></code> option as below.</p>
<p>Normally, when <code class="docutils literal notranslate"><span class="pre">This</span> <span class="pre">is</span> <span class="pre">a</span> <span class="pre">pen.</span> <span class="pre">This</span> <span class="pre">is</span> <span class="pre">an</span> <span class="pre">apple.</span></code> is splitted by <code class="docutils literal notranslate"><span class="pre">.</span></code>,
needless spaces are included at the beginning of “This is an apple.”.</p>
<p>You can except the needless spaces by a <code class="docutils literal notranslate"><span class="pre">pattern</span></code> option as below example.</p>
<p>Execution example:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>tokenize 'TokenDelimit("pattern", "\\.\\s*")' "This is a pen. This is an apple."
# [
# [
# 0,
# 1337566253.89858,
# 0.000355720520019531
# ],
# [
# {
# "value": "This is a pen.",
# "position": 0,
# "force_prefix": false,
# "force_prefix_search": false
# },
# {
# "value": "This is an apple.",
# "position": 1,
# "force_prefix": false,
# "force_prefix_search": false
# }
# ]
# ]
</pre></div>
</div>
</div>
<div class="section" id="advanced-usage">
<h2><span class="section-number">7.8.10.5. </span>Advanced usage<a class="headerlink" href="#advanced-usage" title="Permalink to this headline">¶</a></h2>
<p><code class="docutils literal notranslate"><span class="pre">delimiter</span></code> option can also specify multiple delimiters.</p>
<p>For example, <code class="docutils literal notranslate"><span class="pre">Hello,</span> <span class="pre">World</span></code> is tokenized to <code class="docutils literal notranslate"><span class="pre">Hello</span></code> and <code class="docutils literal notranslate"><span class="pre">World</span></code>.
<code class="docutils literal notranslate"><span class="pre">,</span></code> and `` `` are delimiters in below example.</p>
<p>Execution example:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>tokenize 'TokenDelimit("delimiter", ",", "delimiter", " ")' "Hello, World"
# [
# [
# 0,
# 1337566253.89858,
# 0.000355720520019531
# ],
# [
# {
# "value": "Hello",
# "position": 0,
# "force_prefix": false,
# "force_prefix_search": false
# },
# {
# "value": "World",
# "position": 1,
# "force_prefix": false,
# "force_prefix_search": false
# }
# ]
# ]
</pre></div>
</div>
<p>You can extract token in complex conditions by <code class="docutils literal notranslate"><span class="pre">pattern</span></code> option.</p>
<p>For example, <code class="docutils literal notranslate"><span class="pre">これはペンですか！？リンゴですか？「リンゴです。」</span></code> is tokenize to <code class="docutils literal notranslate"><span class="pre">これはペンですか</span></code> and <code class="docutils literal notranslate"><span class="pre">リンゴですか</span></code>, <code class="docutils literal notranslate"><span class="pre">「リンゴです。」</span></code> with <code class="docutils literal notranslate"><span class="pre">delimiter</span></code> option as below.</p>
<p>Execution example:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>tokenize 'TokenDelimit("pattern", "([。！？]+(?![）」])|[\\r\\n]+)\\s*")' "これはペンですか！？リンゴですか？「リンゴです。」"
# [
# [
# 0,
# 1545179416.22277,
# 0.0002887248992919922
# ],
# [
# {
# "value": "これはペンですか",
# "position": 0,
# "force_prefix": false,
# "force_prefix_search": false
# },
# {
# "value": "リンゴですか",
# "position": 1,
# "force_prefix": false,
# "force_prefix_search": false
# },
# {
# "value": "「リンゴです。」",
# "position": 2,
# "force_prefix": false,
# "force_prefix_search": false
# }
# ]
# ]
</pre></div>
</div>
<p><code class="docutils literal notranslate"><span class="pre">\\s*</span></code> of the end of above regular expression match 0 or more spaces after a delimiter.</p>
<p><code class="docutils literal notranslate"><span class="pre">[。！？]+</span></code> matches 1 or more <code class="docutils literal notranslate"><span class="pre">。</span></code> or <code class="docutils literal notranslate"><span class="pre">！</span></code>, <code class="docutils literal notranslate"><span class="pre">？</span></code>.
For example, <code class="docutils literal notranslate"><span class="pre">[。！？]+</span></code> matches <code class="docutils literal notranslate"><span class="pre">！？</span></code> of <code class="docutils literal notranslate"><span class="pre">これはペンですか！？</span></code>.</p>
<p><code class="docutils literal notranslate"><span class="pre">(?![）」])</span></code> is negative lookahead.
<code class="docutils literal notranslate"><span class="pre">(?![）」])</span></code> matches if a character is not matched <code class="docutils literal notranslate"><span class="pre">）</span></code> or <code class="docutils literal notranslate"><span class="pre">」</span></code>.
negative lookahead interprets in combination regular expression of just before.</p>
<p>Therefore it interprets <code class="docutils literal notranslate"><span class="pre">[。！？]+(?![）」])</span></code>.</p>
<p><code class="docutils literal notranslate"><span class="pre">[。！？]+(?![）」])</span></code> matches if there are not <code class="docutils literal notranslate"><span class="pre">）</span></code> or <code class="docutils literal notranslate"><span class="pre">」</span></code> after <code class="docutils literal notranslate"><span class="pre">。</span></code> or <code class="docutils literal notranslate"><span class="pre">！</span></code>, <code class="docutils literal notranslate"><span class="pre">？</span></code>.</p>
<p>In other words, <code class="docutils literal notranslate"><span class="pre">[。！？]+(?![）」])</span></code> matches <code class="docutils literal notranslate"><span class="pre">。</span></code> of <code class="docutils literal notranslate"><span class="pre">これはペンですか。</span></code>. But <code class="docutils literal notranslate"><span class="pre">[。！？]+(?![）」])</span></code> doesn’t match <code class="docutils literal notranslate"><span class="pre">。</span></code> of <code class="docutils literal notranslate"><span class="pre">「リンゴです。」</span></code>.
Because there is <code class="docutils literal notranslate"><span class="pre">」</span></code> after <code class="docutils literal notranslate"><span class="pre">。</span></code>.</p>
<p><code class="docutils literal notranslate"><span class="pre">[\\r\\n]+</span></code> match 1 or more newline character.</p>
<p>In conclusion, <code class="docutils literal notranslate"><span class="pre">([。！？]+(?![）」])|[\\r\\n]+)\\s*</span></code> uses <code class="docutils literal notranslate"><span class="pre">。</span></code> and <code class="docutils literal notranslate"><span class="pre">！</span></code> and <code class="docutils literal notranslate"><span class="pre">？</span></code>, newline character as delimiter. However, <code class="docutils literal notranslate"><span class="pre">。</span></code> and <code class="docutils literal notranslate"><span class="pre">!</span></code>, <code class="docutils literal notranslate"><span class="pre">？</span></code> are not delimiters if there is <code class="docutils literal notranslate"><span class="pre">）</span></code> or <code class="docutils literal notranslate"><span class="pre">」</span></code> after <code class="docutils literal notranslate"><span class="pre">。</span></code> or <code class="docutils literal notranslate"><span class="pre">！</span></code>, <code class="docutils literal notranslate"><span class="pre">？</span></code>.</p>
</div>
<div class="section" id="parameters">
<h2><span class="section-number">7.8.10.6. </span>Parameters<a class="headerlink" href="#parameters" title="Permalink to this headline">¶</a></h2>
<div class="section" id="optional-parameter">
<h3><span class="section-number">7.8.10.6.1. </span>Optional parameter<a class="headerlink" href="#optional-parameter" title="Permalink to this headline">¶</a></h3>
<p>There are two optional parameters <code class="docutils literal notranslate"><span class="pre">delimiter</span></code> and <code class="docutils literal notranslate"><span class="pre">pattern</span></code>.</p>
<div class="section" id="delimiter">
<h4><span class="section-number">7.8.10.6.1.1. </span><code class="docutils literal notranslate"><span class="pre">delimiter</span></code><a class="headerlink" href="#delimiter" title="Permalink to this headline">¶</a></h4>
<p>Split token with a specified one or more characters.</p>
<p>You can use one or more characters for a delimiter.</p>
</div>
<div class="section" id="pattern">
<h4><span class="section-number">7.8.10.6.1.2. </span><code class="docutils literal notranslate"><span class="pre">pattern</span></code><a class="headerlink" href="#pattern" title="Permalink to this headline">¶</a></h4>
<p>Split token with a regular expression.</p>
</div>
</div>
</div>
<div class="section" id="see-also">
<h2><span class="section-number">7.8.10.7. </span>See also<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li><p><a class="reference internal" href="../commands/tokenize.html"><span class="doc">tokenize</span></a></p></li>
</ul>
</div>
</div>
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</div>
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<h3><a href="../../index.html">Table of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">7.8.10. <code class="docutils literal notranslate"><span class="pre">TokenDelimit</span></code></a><ul>
<li><a class="reference internal" href="#summary">7.8.10.1. Summary</a></li>
<li><a class="reference internal" href="#syntax">7.8.10.2. Syntax</a></li>
<li><a class="reference internal" href="#usage">7.8.10.3. Usage</a></li>
<li><a class="reference internal" href="#simple-usage">7.8.10.4. Simple usage</a></li>
<li><a class="reference internal" href="#advanced-usage">7.8.10.5. Advanced usage</a></li>
<li><a class="reference internal" href="#parameters">7.8.10.6. Parameters</a><ul>
<li><a class="reference internal" href="#optional-parameter">7.8.10.6.1. Optional parameter</a><ul>
<li><a class="reference internal" href="#delimiter">7.8.10.6.1.1. <code class="docutils literal notranslate"><span class="pre">delimiter</span></code></a></li>
<li><a class="reference internal" href="#pattern">7.8.10.6.1.2. <code class="docutils literal notranslate"><span class="pre">pattern</span></code></a></li>
</ul>
</li>
</ul>
</li>
<li><a class="reference internal" href="#see-also">7.8.10.7. See also</a></li>
</ul>
</li>
</ul>
<h4>Previous topic</h4>
<p class="topless"><a href="token_bigram_split_symbol_alpha_digit.html"
title="previous chapter"><span class="section-number">7.8.9. </span><code class="docutils literal notranslate"><span class="pre">TokenBigramSplitSymbolAlphaDigit</span></code></a></p>
<h4>Next topic</h4>
<p class="topless"><a href="token_delimit_null.html"
title="next chapter"><span class="section-number">7.8.11. </span><code class="docutils literal notranslate"><span class="pre">TokenDelimitNull</span></code></a></p>
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