<?xml version=“1.0” encoding=“UTF-8”?> <Communication xmlns=“hl7.org/fhir”>

<id value="example"/>
<meta>
  <security>
    <system value="http://terminology.hl7.org/CodeSystem/v3-ActReason"/>
    <code value="HTEST"/>
    <display value="test health data"/>
  </security>
</meta>

<identifier>
  <type>
    <text value="Paging System"/>
  </type>
  <system value="urn:oid:1.3.4.5.6.7"/>
  <value value="2345678901"/>
</identifier>
<instantiatesUri value="http://example.org/hyperkalemia"/>
<partOf>
      <display value="Serum Potassium Observation"/>
</partOf>
<status value="completed"/>
<category>
  <coding>
    <system value="http://acme.org/messagetypes"/>
    <code value="Alert"/>
  </coding>
  <text value="Alert"/>
</category>
<medium>
  <coding>
    <system value="http://terminology.hl7.org/CodeSystem/v3-ParticipationMode"/>
    <code value="WRITTEN"/>
    <display value="written"/>
  </coding>
  <text value="written"/>
</medium>
<subject>
  <reference value="Patient/example"/>
</subject>

<encounter>
  <reference value="Encounter/example"/>
</encounter>
<sent value="2014-12-12T18:01:10-08:00"/>
<received value="2014-12-12T18:01:11-08:00"/>
<recipient>
  <reference value="Practitioner/example"/>
</recipient>
<sender>
  <reference value="Device/f001"/>
</sender>

<payload>
  <contentString value="Patient 1 has a very high serum potassium value (7.2 mmol/L on 2014-Dec-12 at 5:55 pm)"/>
</payload>
<payload>
  <!-- Reference to the lab result  -->
  <contentReference>
    <display value="Serum Potassium Observation"/>
  </contentReference>
</payload>

</Communication>