Origin with FHIR Resource Example

<ItemGroupDef OID="ODM.IG.LB.WBC" Name="WBC Lab Results with Unit" Repeating="No" MethodOID="ODM.MT.LB.LBORRES">
	<!-- Subject -->
	<ItemRef ItemOID="ODM.IT.LB.SUBJID" Mandatory="Yes">
	 	<Origin Type="Collected" Source="Investigator">
			<Source>
				<SourceItem>
					<!-- The Subject-ID is obtained from ResearchSubject.identifier -->
					<Resource Type="HL7-FHIR" Name="ResearchSubject" Attribute="identifier"/>
				</SourceItem>
			</Source>
		</Origin>
	</ItemRef>
	<!-- Collected Leukocytes (White Blood Count) with units -->
	<!-- The value itself -->
	<!-- Remark the reference to the units item using UnitsItemOID -->
	<ItemRef ItemOID="ODM.IT.LB.WBC.LBORRES" Mandatory="Yes" UnitsItemOID="ODM.IT.LB.WBC.LBORRESU">
		<Origin Type="Collected" Source="Investigator">
			<Source>
				<SourceItem>
					<!-- The value itself is obtained from Observation.valueQuantity.value -->
					<Resource Type="HL7-FHIR" Name="Observation" Attribute="valueQuantity.value"/>
				</SourceItem>
			</Source>
    	</Origin>
	</ItemRef>
	<!-- The units for the leukocytes measurement -->
    <ItemRef ItemOID="ODM.IT.LB.WBC.LBORRESU" Mandatory="Yes">
	 	<Origin Type="Collected" Source="Investigator">
			<Source>
				<SourceItem>
					<!-- The value itself is obtained from Observation.valueQuantity.unit -->
					<Resource Type="HL7-FHIR" Name="Observation" Attribute="valueQuantity.unit"/>
				</SourceItem>
			</Source>
    	</Origin>
	</ItemRef>
    <!-- LOINC code of the test to be performed -->
	<Coding Code="26464-8" System="http://loinc.org" SystemName="LOINC" SystemVersion="2.92"/>	
</ItemGroupDef>