er">ele-1</b>: All FHIR elements must have a @value or children (hasValue() or (children().count() &gt; id.count()))</span></td></tr>

</table>
    </div>
    <a name="tabs-diff"> </a>
    <div id="tabs-diff">
      <p>Guidance on how to interpret the contents of this table can be found<a href="https://build.fhir.org/ig/FHIR/ig-guidance//readingIgs.html#data-dictionaries">here</a></p><table class="dict"><tr><td colspan="2" class="structure"><span class="self-link-parent"><a name="diff_Extension">  </a><sp