<status value="draft" /> <date value="2018-03-21T14:49:16.166+01:00" /> <contact> <name value="Christof Gessner" /> </contact> <description value="Ratio data type, constrained to use UCUM as a codesystem." /> <purpose value="allow only UCUM as a codesystem." /> <fhirVersion value="3.0.1" /> <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.numerator.system"> <path value="Ratio.numerator.system" /> <min value="1" /> <fixedUri value="http://unitsofmeasure.org" /> </element> <element id="Ratio.numerator.code"> <path value="Ratio.numerator.code" /> <min value="1" /> </element> <element id="Ratio.denominator.system"> <path value="Ratio.denominator.system" /> <min value="1" /> <fixedUri value="http://unitsofmeasure.org" /> </element> <element id="Ratio.denominator.code"> <path value="Ratio.denominator.code" /> <min value="1" /> </element> </differential> </StructureDefinition>