th></svg></a></span></td></tr><tr><td style="white-space: nowrap"><a href="http://hl7.org/fhir/R4/conformance-rules.html#conformance">Control</a></td><td>0..0</td></tr>

<tr><td colspan="2" class="structure"><span class="self-link-parent"><a name="diff_Extension.url">  </a><span style="color: grey">4</span><b>. Extension.url</b><a href="#diff_Extension.url" title="link to here" class="self-link"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1792 1792" xmlns:xlink="http://www.w3.org/1999/xlink" widt