<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://fhir.nhs.uk/StructureDefinition/Extension-NHSEngland-KaryotypicSex" />
  <version value="0.1" />
  <name value="KaryotypicSex" />
  <status value="draft" />
  <date value="2022-09-14T11:24:05.5026109+00:00" />
  <description value="Extension to capture Karyotypic Sex details of the patient." />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="Patient" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="https://fhir.nhs.uk/StructureDefinition/Extension-NHSEngland-KaryotypicSex" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <min value="1" />
      <type>
        <code value="code" />
      </type>
      <binding>
        <strength value="required" />
        <description value="A set of codes that define the karyotypic sex for the patient at the time of testing" />
        <valueSet value="https://simplifier.net/hl7fhirukcorer4/ukcore-birthsex" />
      </binding>
    </element>
  </differential>
</StructureDefinition>