<SearchParameter xmlns="http://hl7.org/fhir">
  <id value="DeviceRequest-event-date" />
  <url value="http://hl7.org/fhir/SearchParameter/DeviceRequest-event-date" />
  <name value="event-date" />
  <status value="draft" />
  <experimental value="false" />
  <date value="2017-04-19T07:44:43+10:00" />
  <publisher value="Health Level Seven International (Orders and Observations)" />
  <contact>
    <telecom>
      <system value="url" />
      <value value="http://hl7.org/fhir" />
    </telecom>
  </contact>
  <contact>
    <telecom>
      <system value="url" />
      <value value="http://www.hl7.org/Special/committees/orders/index.cfm" />
    </telecom>
  </contact>
  <code value="event-date" />
  <base value="DeviceRequest" />
  <type value="date" />
  <description value="When service should occur" />
  <expression value="DeviceRequest.occurrence.as(DateTime) | DeviceRequest.occurrence.as(Period)" />
  <xpath value="f:DeviceRequest/f:occurrenceDateTime | f:DeviceRequest/f:occurrencePeriod" />
  <xpathUsage value="normal" />
</SearchParameter>