<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://ehealth.bc.ca/fhir/StructureDefinition/ca-bc-eforms-profile-observationSmoking" />
  <name value="ObservationSmoking" />
  <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.meta">
      <path value="Observation.meta" />
    </element>
    <element id="Observation.meta.profile">
      <path value="Observation.meta.profile" />
      <comment value="Apply &quot;http://ehealth.bc.ca/fhir/StructureDefinition/ca-bc-eforms-profile-observationSmoking&quot;" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Observation.implicitRules">
      <path value="Observation.implicitRules" />
      <max value="0" />
    </element>
    <element id="Observation.language">
      <path value="Observation.language" />
      <max value="0" />
    </element>
    <element id="Observation.text">
      <path value="Observation.text" />
      <max value="0" />
    </element>
    <element id="Observation.contained">
      <path value="Observation.contained" />
      <max value="0" />
    </element>
    <element id="Observation.code.coding.system">
      <path value="Observation.code.coding.system" />
      <code>
        <system value="http://loinc.org" />
      </code>
      <min value="1" />
    </element>
    <element id="Observation.code.coding.code">
      <path value="Observation.code.coding.code" />
      <code>
        <code value="72166-2" />
      </code>
      <min value="1" />
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject" />
      <min value="1" />
    </element>
    <element id="Observation.subject.reference">
      <path value="Observation.subject.reference" />
      <comment value="See Mappings" />
      <min value="1" />
      <mapping>
        <identity value="source-eForms" />
        <map value="fullURL ends with &quot;Patient/&quot;+(Patient ID)" />
      </mapping>
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <min value="1" />
      <type>
        <code value="CodeableConcept" />
      </type>
    </element>
    <element id="Observation.value[x].coding.system">
      <path value="Observation.value[x].coding.system" />
      <code>
        <system value="http://loinc.org" />
      </code>
      <min value="1" />
    </element>
    <element id="Observation.value[x].coding.code">
      <path value="Observation.value[x].coding.code" />
      <code>
        <code value="LA18976-3" />
        <display value="Current every day smoker" />
      </code>
      <code>
        <code value="LA18977-1" />
        <display value="Current some day smoker" />
      </code>
      <code>
        <code value="LA15920-4" />
        <display value="Former smoker" />
      </code>
      <code>
        <code value="LA18978-9" />
        <display value="Never smoker" />
      </code>
      <code>
        <code value="LA18979-7" />
        <display value="Smoker, current status unknown" />
      </code>
      <code>
        <code value="LA18980-5" />
        <display value="Unknown if ever smoked" />
      </code>
      <code>
        <code value="LA18981-3" />
        <display value="Heavy tobacco smoker" />
      </code>
      <code>
        <code value="LA18982-1" />
        <display value="Light tobacco smoker" />
      </code>
      <min value="1" />
    </element>
  </differential>
</StructureDefinition>