---
active_crumb: Docs
layout: documentation
id: built-in-token-enricher
---

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<div class="col-md-8 second-column">
    <section id="overview">
        <h2 class="section-title">Built-in Token Enricher<a href="#"><i class="top-link fas fa-fw fa-angle-double-up"></i></a></h2>

        <p>
            <a href="apis/latest/org/apache/nlpcraft/NCTokenEnricher.html">NCTokenEnricher</a>
            is a component which allows to add additional properties to prepared tokens,
            like part of speech, quote, stop-words flags or any other.
            NLPCraft provides English language default set of token enrichers implementations.
        </p>
    </section>

    <section id="enricher-opennlp-lemmapos">
        <h2 class="section-title">Lemma And POS Enricher<a href="#"><i class="top-link fas fa-fw fa-angle-double-up"></i></a></h2>

        <p>
            <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCOpenNLPLemmaPosTokenEnricher.html">NCOpenNLPLemmaPosTokenEnricher</a> -
            this component allows to add <code>lemma</code> and <code>pos</code> values to processed token.
            Look at these links fpr more details: <a href="https://www.wikiwand.com/en/Lemma_(morphology)">Lemma</a> and
            <a href="https://www.wikiwand.com/en/Part-of-speech_tagging">Part of speech</a>.
            Current implementation is based on <a href="https://opennlp.apache.org/">Apache OpenNLP</a> project components.
            Is uses Apache OpenNLP models, which are accessible
            <a href="http://opennlp.sourceforge.net/models-1.5/">here</a> for POS taggers.
            English lemmatization model is accessible <a href="https://raw.githubusercontent.com/richardwilly98/elasticsearch-opennlp-auto-tagging/master/src/main/resources/models/en-lemmatizer.dict">here</a>.
            You can use any models which are compatible with Apache OpenNLP <a href="https://opennlp.apache.org/docs/2.0.0/apidocs/opennlp-tools/opennlp/tools/postag/POSTaggerME.html">POSTaggerME</a> and
            <a href="https://opennlp.apache.org/docs/2.0.0/apidocs/opennlp-tools/opennlp/tools/lemmatizer/DictionaryLemmatizer.html">DictionaryLemmatizer</a> components.
        </p>
    </section>
    <section id="enricher-opennlp-bracket">
        <h2 class="section-title">Brackets Enricher<a href="#"><i class="top-link fas fa-fw fa-angle-double-up"></i></a></h2>

        <p>
            <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCEnBracketsTokenEnricher.html">NCEnBracketsTokenEnricher</a> -
            this component allows to add <code>brackets</code> boolean flag to processed token.
        </p>
    </section>
    <section id="enricher-opennlp-quotes">
        <h2 class="section-title">Quotes Enricher<a href="#"><i class="top-link fas fa-fw fa-angle-double-up"></i></a></h2>

        <p>
            <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCEnQuotesTokenEnricher.html">NCEnQuotesTokenEnricher</a> -
            this component allows to add <code>quoted</code> boolean flag to processed token.
        </p>
    </section>
    <section id="enricher-opennlp-dict">
        <h2 class="section-title">Dictionary Enricher<a href="#"><i class="top-link fas fa-fw fa-angle-double-up"></i></a></h2>

        <p>
            <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCEnDictionaryTokenEnricher.html">NCEnDictionaryTokenEnricher</a> -
            this component allows to add <code>dict</code> boolean flag to processed token.
            Note that it requires already defined <code>lemma</code> token property,
            You can use <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCOpenNLPLemmaPosTokenEnricher.html">NCOpenNLPLemmaPosTokenEnricher</a> or any another component which sets
            <code>lemma</code> into the token.
        </p>
    </section>
    <section id="enricher-opennlp-stopword">
        <h2 class="section-title">Stop-words Enricher<a href="#"><i class="top-link fas fa-fw fa-angle-double-up"></i></a></h2>

        <p>
            <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCEnStopWordsTokenEnricher.html">NCEnStopWordsTokenEnricher</a> -
            this component allows to add <code>stopword</code> boolean flag to processed token.
            It is based on predefined rules for English language, but it can be also extended by custom user word list and excluded list.
            Note that it requires already defined <code>lemma</code> token property,
            You can use <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCOpenNLPLemmaPosTokenEnricher.html">NCOpenNLPLemmaPosTokenEnricher</a> or any another component which sets
            <code>lemma</code> into the token.
        </p>
    </section>
    <section id="enricher-opennlp-swearword">
        <h2 class="section-title">Swear-words Enricher<a href="#"><i class="top-link fas fa-fw fa-angle-double-up"></i></a></h2>

        <p>
            <a href="apis/latest/org/apache/nlpcraft/nlp/enrichers/NCEnSwearWordsTokenEnricher.html">NCEnSwearWordsTokenEnricher</a> -
            this component allows to add <code>swear</code> boolean flag to processed token.
        </p>
    </section>
</div>
<div class="col-md-2 third-column">
    <ul class="side-nav">
        <li class="side-nav-title">On This Page</li>
        <li><a href="#enricher-opennlp-lemmapos">Lemma And POS Enricher</a></li>
        <li><a href="#enricher-opennlp-bracket">Brackets Enricher</a></li>
        <li><a href="#enricher-opennlp-quotes">Quotes Enricher</a></li>
        <li><a href="#enricher-opennlp-dict">Dictionary Enricher</a></li>
        <li><a href="#enricher-opennlp-stopword">Stop-words Enricher</a></li>
        <li><a href="#enricher-opennlp-swearword">Swear-words Enricher</a></li>
        {% include quick-links.html %}
    </ul>
</div>