<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="68172784-12f2-4437-8680-2595272a885f" />
  <url value="https://fhir.nhs.uk/StructureDefinition/Extension-COVID19-TestResult" />
  <name value="ExtensionCOVID19TestResult" />
  <status value="draft" />
  <date value="2021-04-20" />
  <purpose value="COVID 19 Test Results" />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="Observation" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Extension.extension:reportOrigin">
      <path value="Extension.extension" />
      <sliceName value="reportOrigin" />
      <short value="Indicates the source of a secondarily reported record" />
      <definition value="Source of record creation - i.e. the digital service used to record the test registration.&#xD;&#xA;&#xD;&#xA;The source of the data when the report of the observation event is not based on information from the person who performed the observation." />
      <max value="1" />
    </element>
    <element id="Extension.extension:reportOrigin.url">
      <path value="Extension.extension.url" />
      <fixedUri value="reportOrigin" />
    </element>
    <element id="Extension.extension:reportOrigin.value[x]">
      <path value="Extension.extension.value[x]" />
      <type>
        <code value="CodeableConcept" />
      </type>
    </element>
    <element id="Extension.extension:administrationMethod">
      <path value="Extension.extension" />
      <sliceName value="administrationMethod" />
      <short value="Used to convey how the test was administered" />
      <definition value="used to convey how the test was administered. Possible values are &quot;self&quot; or &quot;health_care_professional&quot;" />
      <max value="1" />
    </element>
    <element id="Extension.extension:administrationMethod.url">
      <path value="Extension.extension.url" />
      <fixedUri value="administrationMethod" />
    </element>
    <element id="Extension.extension:administrationMethod.value[x]">
      <path value="Extension.extension.value[x]" />
      <type>
        <code value="CodeableConcept" />
      </type>
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="https://fhir.nhs.uk/StructureDefinition/Extension-COVID19-TestResult" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>