<Observation xmlns="http://hl7.org/fhir">
    <identifier>
        <system value="localHospitalName" />
        <value value="pat1obs1" />
    </identifier>
    <status value="final" />
    <code>
        <coding>
            <system value="http://loinc.org" />
            <code value="59260-0" />
            <display value="Hemoglobin [Moles/volume] in Blood" />
        </coding>
    </code>
    <subject>
        <reference value="Patient?identifier=localHospitalName|patient1" />
    </subject>
    <encounter>
        <reference value="Encounter?identifier=localHospitalName|encounter11" />
    </encounter>
    <effectiveDateTime value="2019-01-03T02:10:00+01:00" />
    <valueQuantity>
        <value value="2.39" />
        <unit value="mmol/l" />
        <system value="http://unitsofmeasure.org" />
    </valueQuantity>
</Observation>