for Clinical Document example patient (id = "xcda")

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

<Encounter xmlns="http://hl7.org/fhir">
  <id value="xcda"/> 
  <identifier> 
    <use value="official"/> 
    <system value="http://healthcare.example.org/identifiers/enocunter"/> 
    <value value="1234213.52345873"/> 
  </identifier> 
  <status value="completed"/> 
  <class> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/v3-ActCode"/> 
      <code value="AMB"/> 
      <!--   outpatient   -->
      <display value="ambulatory"/> 
    </coding> 
  </class> 
  <subject> 
    <reference value="Patient/xcda"/> 
  </subject> 
  <participant> 
    <actor> 
      <reference value="Practitioner/xcda1"/> 
    </actor> 
  </participant> 
  <reason> 
    <value> 
      <concept> 
        <coding> 
          <system value="http://ihe.net/xds/connectathon/eventCodes"/> 
          <code value="T-D8200"/> 
          <display value="Arm"/> 
        </coding> 
      </concept> 
    </value> 
  </reason> 
</Encounter>