Example Obs

<Observation xmlns="http://hl7.org/fhir">
   <id value="178200"/>
   <meta>
      <lastUpdated value="2017-11-03T12:37:46.920+00:00"/>
      <profile value="https://fhir.hl7.org.uk/STU3/StructureDefinition/CareConnect-Observation-1"/>
   </meta>
   <status value="final"/>
   <category>
      <coding>
         <system value="http://hl7.org/fhir/observation-category"/>
         <code value="laboratory"/>
         <display value="Laboratory"/>
      </coding>
   </category>
   <code>
      <coding>
         <system value="http://snomed.info/sct"/>
         <code value="165581004"/>
         <display value="International normalized ratio (observable entity)"/>
      </coding>
   </code>
   <subject>
      <reference value="Patient/1080"/>
   </subject>
   <effectiveDateTime value="2018-07-10T00:00:00+01:00"/>
   <performer>
      <reference value="Practioner/98836"/>
      <display value="Dr B Chang"/>
   </performer>
   <valueQuantity>
      <value value="0.3"/>
   </valueQuantity>
   <interpretation>
      <coding>
         <system value="http://hl7.org/fhir/v2/0078"/>
         <code value="L"/>
         <display value="Low"/>
      </coding>
   </interpretation>
   <referenceRange>
      <low>
         <value value="0.5"/>
      </low>
      <high>
         <value value="1.1"/>
      </high>
   </referenceRange>
</Observation>