 can be extended with new rules</li>
</ul>
<h2 id="conclusion">Conclusion</h2>
<p>Isolated rule execution provides the power of Grapa's executable BNF system without the risks of modifying the main language grammar. The three key patterns demonstrated are:</p>
<ul>
<li><strong>Pattern 1</strong>: <code>op()("input", rule)()</code> - Direct rule execution for simple parsing tasks</li>
<li><strong>Pattern 2</strong>: Object-based organization with <code>$LIST</code> and <code>$CLASS</code> for structured rule