<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://datamodel.org/fhir/StructureDefinition/MyObservation" />
  <name value="DataModelObservation" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Observation" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" />
  <derivation value="constraint" />
  <differential>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <min value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="https://datamodel.org/fhir/StructureDefinition/MyPatient" />
      </type>
    </element>
    <element id="Observation.subject.reference">
      <path value="Observation.subject.reference" />
      <min value="1" />
      <fixedString value="Patient" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <type>
        <code value="CodeableConcept" />
      </type>
      <fixedCodeableConcept>
        <coding>
          <system value="http://snomed.info/sct" />
          <code value="118230007" />
          <display value="Hearing finding (finding)" />
        </coding>
      </fixedCodeableConcept>
    </element>
    <element id="Observation.method">
      <path value="Observation.method" />
      <min value="1" />
    </element>
    <element id="Observation.derivedFrom">
      <path value="Observation.derivedFrom" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Media" />
      </type>
    </element>
    <element id="Observation.component.referenceRange">
      <path value="Observation.component.referenceRange" />
      <contentReference value="http://hl7.org/fhir/StructureDefinition/Observation#Observation.referenceRange" />
    </element>
  </differential>
</StructureDefinition>