An example to demonstrate using the bodyPosition and delta extensions (id = "map-sitting")

<?xml version="1.0" encoding="UTF-8"?>

<Observation xmlns="http://hl7.org/fhir">
  <id value="map-sitting"/> 

      <!--     To be used only when the body position in not precoordinated in the observation
   code.   -->
  <text> <status value="extensions"/> <div xmlns="http://www.w3.org/1999/xhtml"><p> <b> Generated Narrative: Observation</b> <a name="map-sitting"> </a> </p> <div style="display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border:
       1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px">Resource Observation &quot;map-sitting&quot; </p> </div> <p> <b> Observation Body Position</b> : Sitting position (finding) <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="https://browser.ihtsdotools.org/">SNOMED CT</a> #33586001)</span> </p> <p> <b> Observation Delta</b> : Decreased (qualifier value) <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="https://browser.ihtsdotools.org/">SNOMED CT</a> #1250004)</span> </p> <p> <b> status</b> : final</p> <p> <b> category</b> : Laboratory <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="http://terminology.hl7.org/5.1.0/CodeSystem-observation-category.html">Observation Category Codes</a> #laboratory)</span> </p> <p> <b> code</b> : Mean blood pressure <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="https://loinc.org/">LOINC</a> #8478-0)</span> </p> <p> <b> subject</b> : <a href="patient-example.html">Patient/example</a>  &quot;Peter CHALMERS&quot;</p> <p> <b> encounter</b> : <a href="encounter-example.html">Encounter/example</a> </p> <p> <b> effective</b> : 2018-04-02T10:30:10+01:00 --&gt; 2018-04-05T10:30:10+01:00</p> <p> <b> issued</b> : 4 Apr 2018, 12:30:10 am</p> <p> <b> value</b> : 60 mm Hg<span style="background: LightGoldenRodYellow"> (Details: UCUM code mm[Hg] = 'mmHg')</span> </p> <p> <b> interpretation</b> : Below low normal <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (v2-0078#L &quot;Low&quot;)</span> </p> </div> </text> <extension url="http://hl7.org/fhir/StructureDefinition/observation-bodyPosition">
    <valueCodeableConcept> 
      <coding> 
        <system value="http://snomed.info/sct"/> 
        <code value="33586001"/> 
        <display value="Sitting position (finding)"/> 
      </coding> 
    </valueCodeableConcept> 
  </extension> 
        <!--     The qualitative change in the value relative to the previous measurement. Usually
   only recorded if the change is clinically significant.   -->
  <extension url="http://hl7.org/fhir/StructureDefinition/observation-delta">
    <valueCodeableConcept> 
      <coding> 
        <system value="http://snomed.info/sct"/> 
        <code value="1250004"/> 
        <display value="Decreased (qualifier value)"/> 
      </coding> 
    </valueCodeableConcept> 
  </extension> 
  <status value="final"/> 
  <category> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/observation-category"/> 
      <code value="laboratory"/> 
      <display value="Laboratory"/> 
    </coding> 
  </category> 
  <code> 
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="8478-0"/> 
      <display value="Mean blood pressure"/> 
    </coding> 
  </code> 
  <subject> 
    <reference value="Patient/example"/> 
  </subject> 
  <encounter> 
    <reference value="Encounter/example"/> 
  </encounter> 
  <effectivePeriod> 
    <start value="2018-04-02T10:30:10+01:00"/> 
    <end value="2018-04-05T10:30:10+01:00"/> 
  </effectivePeriod> 
  <issued value="2018-04-03T15:30:10+01:00"/> 
  <valueQuantity> 
    <value value="60"/> 
    <unit value="mm Hg"/> 
    <system value="http://unitsofmeasure.org"/> 
    <code value="mm[Hg]"/> 
  </valueQuantity> 
  <interpretation> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/v2-0078"/> 
      <code value="L"/> 
      <display value="Low"/> 
    </coding> 
    <text value="Below low normal"/> 
  </interpretation> 
</Observation>