repeat.description">Description</a>
          </h6>
<p>
            The repetition directive allows to repeat an arbitrary generator expression
            while optionally specifying the lower and upper repetition counts. It
            provides a more powerful and flexible mechanism for repeating a generator.
            There are grammars that are impractical and cumbersome, if not impossible,
            for the basic EBNF iteration syntax ( <a class="link" href="../operator/kleene.html" title="Kleene S