<OperationOutcome xmlns="http://hl7.org/fhir">
  <id value="operationoutcome-example-duplicate" />
  <meta>
    <profile value="http://ontariohealth.ca/fhir/pcr/StructureDefinition/pcr-operationoutcome-contribution" />
  </meta>
  <issue>
    <severity value="error" />
    <code value="duplicate" />
    <details>
      <text value="A patient matching the supplied identifiers already exists." />
    </details>
  </issue>
</OperationOutcome>