<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://example.org/fhir/StructureDefinition/headacheType" />
  <name value="headacheType" />
  <status value="draft" />
  <fhirVersion value="3.0.2" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Observation" />
  <baseDefinition value="https://example.org/fhir/StructureDefinition/MyObservation" />
  <derivation value="constraint" />
  <differential>
    <element id="Observation.code.coding.code">
      <path value="Observation.code.coding.code" />
      <fixedCode value="89196-0" />
    </element>
    <element id="Observation.code.text">
      <path value="Observation.code.text" />
      <fixedString value="Kopfschmerztyp" />
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
      <type>
        <code value="Period" />
      </type>
    </element>
    <element id="Observation.interpretation">
      <path value="Observation.interpretation" />
      <min value="1" />
    </element>
    <element id="Observation.interpretation.coding.code">
      <path value="Observation.interpretation.coding.code" />
      <fixedCode value="89193-7" />
    </element>
    <element id="Observation.interpretation.text">
      <path value="Observation.interpretation.text" />
      <fixedString value="quicktest result: &quot;Migraine&quot; or &quot;tension headache&quot;" />
    </element>
  </differential>
</StructureDefinition>