pan>id_start         </strong> ::=  &quot;a&quot;...&quot;z&quot; | &quot;A&quot;...&quot;Z&quot; | &quot;_&quot;
<strong id="grammar-token-sf-id_continue"><span id="grammar-token-id-continue"></span>id_continue      </strong> ::=  <a class="reference internal" href="#grammar-token-sf-id_start"><code class="xref docutils literal notranslate"><span class="pre">id_start</span></code></a> | <a class="reference internal" href="#grammar-token-sf-digit"><code class="xref docutils literal notranslate"><span class=