i>-->


      <!--<li>
        <a href="#tabs-json">Pseudo-JSON</a>
      </li>-->


      <!--<li>
        <a href="#tabs-ttl">Pseudo-TTL</a>
      </li>-->

      <li>
        <a href="#tabs-summ">Statistics/References</a>
      </li>
      <li>
        <a href="#tabs-all">All</a>
      </li>
    </ul>
    <a name="tabs-diff"> </a>
    <div id="tabs-diff">
      <div id="tbl-diff">
        <p>This structure is derived from <a href="http://hl7.org/fhir/R4/extensibility.html#Extension">Extension</a>
       