code>|</code> <code>[</code> <code class="grammar-literal">A-F</code><code>]</code>  <code>|</code> <code>[</code> <code class="grammar-literal">a-f</code><code>]</code> </td>
    </tr>
    <tr id="tg-grammar-production-PN_LOCAL_ESC">
      <td>[172s]</td>
      <td><code>PN_LOCAL_ESC</code></td>
      <td>::=</td>
      <td>"<code class="grammar-literal">\</code>" <code>(</code> "<code class="grammar-literal">_</code>" <code>|</code> "<code class="grammar-literal">~</code>" <code>|</code> "<code class="gra