<status value="active" /> <date value="2018-03-21T14:49:16.166+01:00" /> <description value="Ratio data type, constrained to use UCUM as a codesystem." /> <purpose value="Allow only UCUM as a codesystem." /> <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" /> <type> <code value="Quantity" /> <profile value="http://hl7.org/fhir/uv/ips/StructureDefinition/Quantity-uv-ips" /> </type> <mustSupport value="true" /> </element> <element id="Ratio.denominator"> <path value="Ratio.denominator" /> <type> <code value="Quantity" /> <profile value="http://hl7.org/fhir/uv/ips/StructureDefinition/Quantity-uv-ips" /> </type> <mustSupport value="true" /> </element> </differential> </StructureDefinition>