/abbr></code><code class="grammar-literal">-</code><code class="grammar-char-escape"><abbr title="unicode 'Noncharacter'">#x000EFFFF</abbr></code><code>]</code> </td>
    </tr>
    <tr id="tg-grammar-production-PN_CHARS_U">
      <td>[164s]</td>
      <td><code>PN_CHARS_U</code></td>
      <td>::=</td>
      <td><a href="#tg-grammar-production-PN_CHARS_BASE">PN_CHARS_BASE</a> <code>|</code> "<code class="grammar-literal">_</code>"</td>
    </tr>
    <tr id="tg-grammar-production-PN_CHARS">
      <td>[166s]<