<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="wt-metric-observation" />
  <url value="https://corhealth-ontario.ca/fhir/StructureDefinition/wt-metric-observation" />
  <name value="WtMetricObservation" />
  <title value="Wait Time Metric Base Observation" />
  <status value="active" />
  <description value="Wait Time Metric Base Observation" />
  <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.status">
      <path value="Observation.status" />
      <patternCode value="preliminary" />
    </element>
    <element id="Observation.code">
      <path value="Observation.code" />
      <binding>
        <strength value="required" />
        <valueSet value="https://corhealth-ontario.ca/fhir/ValueSet/WtMetricDataElementObservationVS" />
      </binding>
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <min value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="https://corhealth-ontario.ca/fhir/StructureDefinition/corhealth-patient" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <mustSupport value="true" />
    </element>
  </differential>
</StructureDefinition>