<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="medication-totalDailyDose" />
  <url value="http://hl7.org/fhir/StructureDefinition/medication-totalDailyDose" />
  <version value="4.0" />
  <name value="medication-totalDailyDose" />
  <title value="Total Daily Dose" />
  <status value="draft" />
  <publisher value="Orion Health" />
  <description value="Indicates the total daily dose of a medication" />
  <purpose value="This extension indicates the total daily dose of a medication" />
  <fhirVersion value="4.0" />
  <kind value="complex-type" />
  <abstract value="false" />
  <type value="Extension" />
  <snapshot>
    <element id="Extension">
      <path value="Extension" />
      <max value="1" />
      <base>
        <path value="Extension" />
        <max value="1" />
      </base>
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <base>
        <path value="Extension.url" />
      </base>
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/medication-totalDailyDose" />
    </element>
    <element id="Extension.value[x]">
      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
        <valueCode value="normative" />
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version">
        <valueCode value="4.0.0" />
      </extension>
      <path value="Extension.value[x]" />
      <short value="Indicates the total daily dose of a medication" />
      <definition value="Set the total daily dose of this medication" />
      <comment value="The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.value[x]" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="Quantity" />
      </type>
      <condition value="ele-1" />
      <constraint>
        <key value="ele-1" />
        <severity value="error" />
        <human value="All FHIR elements must have a @value or children" />
        <expression value="hasValue() or (children().count() &gt; id.count())" />
        <xpath value="@value|f:*|h:div" />
        <source value="http://hl7.org/fhir/StructureDefinition/Element" />
      </constraint>
      <constraint>
        <key value="qty-3" />
        <severity value="error" />
        <human value="If a code for the unit is present, the system SHALL also be present" />
        <expression value="code.empty() or system.exists()" />
        <xpath value="not(exists(f:code)) or exists(f:system)" />
        <source value="http://hl7.org/fhir/StructureDefinition/Quantity" />
      </constraint>
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
      <mapping>
        <identity value="v2" />
        <map value="SN (see also Range) or CQ" />
      </mapping>
      <mapping>
        <identity value="rim" />
        <map value="PQ, IVL&lt;PQ&gt;, MO, CO, depending on the values" />
      </mapping>
    </element>
  </snapshot>
  <differential>
    <element id="Extension">
      <path value="Extension" />
      <max value="1" />
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/medication-totalDailyDose" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <short value="Indicates the total daily dose of a medication" />
      <definition value="Set the total daily dose of this medication" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
  </differential>
</StructureDefinition>