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 <status value="active" /> <fhirVersion value="4.0.1" /> <kind value="complex-type" /> <abstract value="false" /> <type value="Quantity" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Quantity" /> <derivation value="constraint" /> <differential> <element id="Quantity"> <path value="Quantity" /> <mustSupport value="true" /> <binding> <strength value="extensible" /> <valueSet value="https://fhir.infoway-inforoute.ca/ValueSet/prescriptiondosequantityunit" /> </binding> </element> <element id="Quantity.value"> <path value="Quantity.value" /> <mustSupport value="true" /> </element> <element id="Quantity.comparator"> <path value="Quantity.comparator" /> <max value="0" /> </element> <element id="Quantity.unit"> <path value="Quantity.unit" /> <mustSupport value="true" /> </element> <element id="Quantity.system"> <path value="Quantity.system" /> <mustSupport value="true" /> </element> <element id="Quantity.code"> <path value="Quantity.code" /> <mustSupport value="true" /> </element> </differential> </StructureDefinition>