ecial">()</span></code> remain as is.
      The assignment operator <code class="computeroutput"><span class="special">=</span></code> is used
      in place of EBNF's <code class="computeroutput"><span class="special">::=</span></code>. Last but
      not least, the Kleene star <code class="computeroutput"><span class="special">*</span></code>,
      which in this case is a postfix operator in EBNF becomes a prefix. Instead
      of:
    </p>
<pre class="programlisting"><span class="identifier">a</span><sp