Ratio data type, constrained to use UCUM as a codesystem.
 <status value="draft" /> <date value="2018-03-21T13:49:16+00:00" /> <description value="Ratio data type, constrained to use UCUM as a codesystem." /> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm" /> <code value="001" /> <display value="World" /> </coding> </jurisdiction> <purpose value="allow only UCUM as a codesystem." /> <fhirVersion value="4.0.0" /> <mapping> <identity value="v2" /> <uri value="http://hl7.org/v2" /> <name value="HL7 v2 Mapping" /> </mapping> <mapping> <identity value="rim" /> <uri value="http://hl7.org/v3" /> <name value="RIM Mapping" /> </mapping> <kind value="complex-type" /> <abstract value="false" /> <type value="Ratio" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Ratio" /> <derivation value="constraint" /> <differential> <element id="Ratio"> <path value="Ratio" /> <mustSupport value="true" /> </element> <element id="Ratio.numerator"> <path value="Ratio.numerator" /> <mustSupport value="true" /> </element> <element id="Ratio.numerator.system"> <path value="Ratio.numerator.system" /> <min value="1" /> <fixedUri value="http://unitsofmeasure.org" /> <mustSupport value="true" /> </element> <element id="Ratio.numerator.code"> <path value="Ratio.numerator.code" /> <min value="1" /> <mustSupport value="true" /> </element> <element id="Ratio.denominator"> <path value="Ratio.denominator" /> <mustSupport value="true" /> </element> <element id="Ratio.denominator.system"> <path value="Ratio.denominator.system" /> <min value="1" /> <fixedUri value="http://unitsofmeasure.org" /> <mustSupport value="true" /> </element> <element id="Ratio.denominator.code"> <path value="Ratio.denominator.code" /> <min value="1" /> <mustSupport value="true" /> </element> </differential> </StructureDefinition>