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<h1>PerfectExtractor Manual</h1>
<section id="filters">
<h3>Query Filters</h3>
    <section id="pos">
        <h4>Part-of-speech tags</h4>
        Used to filter results based on part-of-speech tags as annotated in the corpus source files. Tags may vary between corpora and languages.
    </section>
    <section id="regex">
        <h4>Regular Expressions</h4>
        Filter results using a <a href="https://en.wikipedia.org/wiki/Regular_expressio">regular expression</a> that is applied on a word level. Regular expressions should be
        given in Python's regular expression syntax and are case-insensitive. More information can be found in the <a href="https://docs.python.org/3.8/library/re.html">official documentation</a>. See also <a href="https://pythex.org/">pythex</a> and <a href="https://www.regexpal.com/">regexpal</a> for interactive experimentation with regular expressions.
        <h5>Examples:</h5>
        <dl>
          <dt>^wh</dt><dd>matches all words beginning with <em>wh</em></dd>
          <dt>ly$</dt><dd>matches all words ending with <em>ly</em></dd>
          <dt>^ha(s|ve)$</dt><dd>matches either <em>has</em> or <em>have</em></dd>
        </dl>
    </section>
</section>
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