An example an empty search result with a warning (id = "bundle-search-warning")

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

<Bundle xmlns="http://hl7.org/fhir">
  <id value="bundle-search-warning"/> 
  <meta> 
    <lastUpdated value="2017-03-14T08:23:30+11:00"/> 
  </meta> 
  <type value="searchset"/> 
  <total value="0"/> 
  <link> 
    <relation value="self"/> 
    <url value="https://example.org/fhir/Observation?patient.identifier=http://example.com/fhir/identifier/mr
    n|123456"/> 
  </link> 
  <entry> 
    <fullUrl value="urn:uuid:2866af9c-137d-4458-a8a9-eeeec0ce5583"/> 
    <resource> 
      <OperationOutcome> 
        <id value="warning"/> 
        <text> 
          <status value="generated"/> <div xmlns="http://www.w3.org/1999/xhtml">There is no matching patient for MRN 123456</div> 
        </text> 
        <issue> 
          <severity value="warning"/> 
          <code value="not-found"/> 
          <details> 
            <text value="There is no matching patient for MRN 123456"/> 
          </details> 
        </issue> 
      </OperationOutcome> 
    </resource> 
    <search> 
      <!--   this is not a match - it's about the search   -->
      <mode value="outcome"/> 
    </search> 
  </entry> 
</Bundle>