<SearchParameter xmlns="http://hl7.org/fhir">
  <id value="MessageHeader-code" />
  <url value="http://hl7.org/fhir/SearchParameter/MessageHeader-code" />
  <name value="code" />
  <status value="draft" />
  <experimental value="false" />
  <publisher value="Health Level Seven International (Infrastructure And Messaging)" />
  <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/inm/index.cfm" />
    </telecom>
  </contact>
  <code value="code" />
  <base value="MessageHeader" />
  <type value="token" />
  <description value="ok | transient-error | fatal-error" />
  <expression value="MessageHeader.response.code" />
  <xpath value="f:MessageHeader/f:response/f:code" />
  <xpathUsage value="normal" />
</SearchParameter>