Example with sub-requests derived from the request (id = "subrequest")

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

<ServiceRequest xmlns="http://hl7.org/fhir">
  <id value="subrequest"/>     <!--     <extension url="http://hl7.org/fhir/StructureDefinition/bodysitecode">
    <valueCodeableConcept>
      <coding>
        <system value="http://snomed.info/sct"/>
        <code value="51185008"/>
        <display value="Thoracic structure"/>
      </coding>
    </valueCodeableConcept>
</extension>
     -->
  <text> <status value="generated"/> <div xmlns="http://www.w3.org/1999/xhtml"><p> <b> Generated Narrative: ServiceRequest</b> <a name="subrequest"> </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 ServiceRequest &quot;subrequest&quot; </p> </div> <p> <b> basedOn</b> : <span title="   &lt;extension url=&quot;http://hl7.org/fhir/StructureDefinition/bodysitecode&quot;&gt;
    &lt;valueCodeableConcept&gt;
      &lt;coding&gt;
        &lt;system value=&quot;http://snomed.info/sct&quot;/&gt;
        &lt;code value=&quot;51185008&quot;/&gt;
        &lt;display value=&quot;Thoracic structure&quot;/&gt;
      &lt;/coding&gt;
    &lt;/valueCodeableConcept&gt;
&lt;/extension&gt;
   "><span> : Original Request</span> </span> </p> <p> <b> replaces</b> : <span> : Previous allergy test</span> </p> <p> <b> requisition</b> : id: A13848392</p> <p> <b> status</b> : active</p> <p> <b> intent</b> : instance-order</p> <p> <b> priority</b> : routine</p> <h3> Codes</h3> <table class="grid"><tr> <td> -</td> <td> <b> Concept</b> </td> </tr> <tr> <td> *</td> <td> Peanut IgG <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="https://loinc.org/">LOINC</a> #35542-0)</span> </td> </tr> </table> <p> <b> subject</b> : <a href="patient-example-dicom.html">Patient/dicom</a>  &quot; MINT_TEST&quot;</p> <p> <b> occurrence</b> : 2013-05-08T09:33:27+07:00</p> <p> <b> requester</b> : <a href="practitioner-example.html">Practitioner/example: Dr. Adam Careful</a>  &quot;Adam CAREFUL&quot;</p> <p> <b> performerType</b> : Nurse <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> ([not stated] &quot;Qualified nurse&quot;)</span> </p> <h3> Reasons</h3> <table class="grid"><tr> <td> -</td> <td> <b> Concept</b> </td> </tr> <tr> <td> *</td> <td> Check for Peanut Allergy <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> ()</span> </td> </tr> </table> <p> <b> bodySite</b> : Right arm <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> ([not stated])</span> </p> </div> </text> <basedOn> 
    <display value="Original Request"/> 
  </basedOn> 
  <replaces> 
    <display value="Previous allergy test"/> 
  </replaces> 

  <requisition> 
          <!--    from Element: extension    -->
      <value value="A13848392"/>       <!--    0..1 The value that is unique    -->
  </requisition> 

  <status value="active"/> 
  <intent value="instance-order"/> 
  <priority value="routine"/> 

  <code> 
    <concept> 
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="35542-0"/> 
    </coding> 
    <text value="Peanut IgG"/> 
    </concept> 
  </code> 
  <subject> 
    <reference value="Patient/dicom"/> 
  </subject> 
  <occurrenceDateTime value="2013-05-08T09:33:27+07:00"/> 
  <requester> 
      <reference value="Practitioner/example"/> 
      <display value="Dr. Adam Careful"/> 
  </requester> 
  <performerType> 
      <coding> 
          <display value="Qualified nurse"/> 
      </coding> 
      <text value="Nurse"/> 
  </performerType> 
  <reason> 
    <concept> 
      <text value="Check for Peanut Allergy"/> 
    </concept> 
  </reason> 
  <bodySite> 
      <coding> 
          <display value="Right arm"/> 
      </coding> 
      <text value="Right arm"/> 
  </bodySite>         <!--    insert contents here    -->

</ServiceRequest>