<SearchParameter xmlns="http://hl7.org/fhir">
  <id value="Observation-value-string" />
  <url value="http://hl7.org/fhir/SearchParameter/Observation-value-string" />
  <name value="value-string" />
  <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="value-string" />
  <base value="Observation" />
  <type value="string" />
  <description value="The value of the observation, if the value is a string, and also searches in CodeableConcept.text" />
  <expression value="Observation.value.as(String)" />
  <xpath value="f:Observation/f:valueString" />
  <xpathUsage value="normal" />
</SearchParameter>