<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="SmartAL-Observation-BloodPressure" />
  <url value="http://alticelabs.com/fhir/StructureDefinition/SmartAL-Observation-BloodPressure" />
  <name value="SmartALObservationBloodPressure" />
  <title value="SmartAL Observation — Blood Pressure" />
  <status value="active" />
  <description value="Blood pressure panel observation (LOINC 85354-9). This is a panel with no&#xA;top-level value. Systolic and diastolic readings are expressed as component&#xA;entries.&#xA;&#xA;Each component MAY include interpretation and referenceRange when a matching&#xA;ObservationDefinition exists." />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Observation" />
  <baseDefinition value="http://alticelabs.com/fhir/StructureDefinition/SmartAL-Observation-Base" />
  <derivation value="constraint" />
  <differential>
    <element id="Observation.code.coding">
      <path value="Observation.code.coding" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="code" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Observation.code.coding:loinc">
      <path value="Observation.code.coding" />
      <sliceName value="loinc" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Observation.code.coding:loinc.system">
      <path value="Observation.code.coding.system" />
      <fixedUri value="http://loinc.org" />
    </element>
    <element id="Observation.code.coding:loinc.code">
      <path value="Observation.code.coding.code" />
      <min value="1" />
      <fixedCode value="85354-9" />
    </element>
    <element id="Observation.code.coding:loinc.display">
      <path value="Observation.code.coding.display" />
      <fixedString value="Blood pressure panel with all children optional" />
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <max value="0" />
    </element>
    <element id="Observation.component">
      <path value="Observation.component" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="code.coding.code" />
        </discriminator>
        <ordered value="false" />
        <rules value="open" />
      </slicing>
      <min value="2" />
    </element>
    <element id="Observation.component:systolic">
      <path value="Observation.component" />
      <sliceName value="systolic" />
      <min value="1" />
      <max value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.component:systolic.code.coding">
      <path value="Observation.component.code.coding" />
      <min value="1" />
    </element>
    <element id="Observation.component:systolic.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://loinc.org" />
    </element>
    <element id="Observation.component:systolic.code.coding.code">
      <path value="Observation.component.code.coding.code" />
      <min value="1" />
      <fixedCode value="8480-6" />
    </element>
    <element id="Observation.component:systolic.code.coding.display">
      <path value="Observation.component.code.coding.display" />
      <fixedString value="Systolic blood pressure" />
    </element>
    <element id="Observation.component:systolic.value[x]">
      <path value="Observation.component.value[x]" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:systolic.value[x].value">
      <path value="Observation.component.value[x].value" />
      <min value="1" />
    </element>
    <element id="Observation.component:systolic.value[x].unit">
      <path value="Observation.component.value[x].unit" />
      <fixedString value="mmHg" />
    </element>
    <element id="Observation.component:systolic.value[x].system">
      <path value="Observation.component.value[x].system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:systolic.value[x].code">
      <path value="Observation.component.value[x].code" />
      <fixedCode value="mm[Hg]" />
    </element>
    <element id="Observation.component:systolic.interpretation">
      <path value="Observation.component.interpretation" />
      <short value="MHR-enriched interpretation (N, L, LL, H, HH)" />
    </element>
    <element id="Observation.component:systolic.referenceRange">
      <path value="Observation.component.referenceRange" />
      <short value="MHR-enriched reference ranges for systolic" />
    </element>
    <element id="Observation.component:diastolic">
      <path value="Observation.component" />
      <sliceName value="diastolic" />
      <min value="1" />
      <max value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.component:diastolic.code.coding">
      <path value="Observation.component.code.coding" />
      <min value="1" />
    </element>
    <element id="Observation.component:diastolic.code.coding.system">
      <path value="Observation.component.code.coding.system" />
      <fixedUri value="http://loinc.org" />
    </element>
    <element id="Observation.component:diastolic.code.coding.code">
      <path value="Observation.component.code.coding.code" />
      <min value="1" />
      <fixedCode value="8462-4" />
    </element>
    <element id="Observation.component:diastolic.code.coding.display">
      <path value="Observation.component.code.coding.display" />
      <fixedString value="Diastolic blood pressure" />
    </element>
    <element id="Observation.component:diastolic.value[x]">
      <path value="Observation.component.value[x]" />
      <min value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:diastolic.value[x].value">
      <path value="Observation.component.value[x].value" />
      <min value="1" />
    </element>
    <element id="Observation.component:diastolic.value[x].unit">
      <path value="Observation.component.value[x].unit" />
      <fixedString value="mmHg" />
    </element>
    <element id="Observation.component:diastolic.value[x].system">
      <path value="Observation.component.value[x].system" />
      <fixedUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:diastolic.value[x].code">
      <path value="Observation.component.value[x].code" />
      <fixedCode value="mm[Hg]" />
    </element>
    <element id="Observation.component:diastolic.interpretation">
      <path value="Observation.component.interpretation" />
      <short value="MHR-enriched interpretation (N, L, LL, H, HH)" />
    </element>
    <element id="Observation.component:diastolic.referenceRange">
      <path value="Observation.component.referenceRange" />
      <short value="MHR-enriched reference ranges for diastolic" />
    </element>
  </differential>
</StructureDefinition>