This profile of the Quantity datatype imposes the usage of the UCUM code system for units
 <status value="draft" /> <date value="2018-03-20T16:17:13+00:00" /> <publisher value="HL7 International" /> <description value="Datatype Quantity constrianed to use the UCUM units" /> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm" /> <code value="001" /> <display value="World" /> </coding> </jurisdiction> <purpose value="This profile of the Quantity datatype imposes the usage of the UCUM code system for units" /> <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="Quantity" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Quantity" /> <derivation value="constraint" /> <snapshot /> <differential> <element id="Quantity"> <path value="Quantity" /> <short value="A measured amount using UCUM" /> <definition value="A measured amount (or an amount that can potentially be measured). Note that measured amounts include amounts that are not precisely quantified, including amounts involving arbitrary units and floating currencies. This profile imposes that the code system for unit be UCUM" /> <mustSupport value="true" /> </element> <element id="Quantity.system"> <path value="Quantity.system" /> <short value="UCUM system for units" /> <min value="1" /> <fixedUri value="http://unitsofmeasure.org" /> <mustSupport value="true" /> </element> <element id="Quantity.code"> <path value="Quantity.code" /> <min value="1" /> <mustSupport value="true" /> </element> </differential> </StructureDefinition>