<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://hl7.org/fhir/ips/StructureDefinition/observation-alcoholuse-uv-ips" />
  <name value="Observation-alcoholUse-uv-ips" />
  <status value="draft" />
  <date value="2018-03-20T11:00:52.49+01:00" />
  <description value="This profile constrains the Observation resource to represent alcohol use assessment in a patient summary" />
  <fhirVersion value="3.0.1" />
  <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">
      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-display-hint">
        <valueString value="default: final" />
      </extension>
      <path value="Observation.status" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.code">
      <path value="Observation.code" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="CodeableConcept" />
        <profile value="http://hl7.org/fhir/ips/StructureDefinition/CodeableConcept-uv-ips" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Observation.code.coding.system">
      <path value="Observation.code.coding.system" />
      <fixedUri value="http://loinc.org" />
    </element>
    <element id="Observation.code.coding.code">
      <path value="Observation.code.coding.code" />
      <fixedCode value="74013-4" />
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <min value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Observation.subject.identifier">
      <path value="Observation.subject.identifier" />
      <max value="0" />
    </element>
    <element id="Observation.effective[x]">
      <path value="Observation.effective[x]" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x]:valueQuantity">
      <path value="Observation.valueQuantity" />
      <sliceName value="valueQuantity" />
      <type>
        <code value="Quantity" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x]:valueQuantity.value">
      <path value="Observation.valueQuantity.value" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x]:valueQuantity.comparator">
      <path value="Observation.valueQuantity.comparator" />
      <max value="0" />
    </element>
    <element id="Observation.value[x]:valueQuantity.system">
      <path value="Observation.valueQuantity.system" />
      <fixedUri value="http://unitsofmeasure.org" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x]:valueQuantity.code">
      <path value="Observation.valueQuantity.code" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
  </differential>
</StructureDefinition>