<SearchParameter xmlns="http://hl7.org/fhir">
  <id value="Observation-code-value-date" />
  <url value="http://hl7.org/fhir/SearchParameter/Observation-code-value-date" />
  <name value="code-value-date" />
  <status value="draft" />
  <experimental value="false" />
  <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="code-value-date" />
  <base value="Observation" />
  <type value="composite" />
  <description value="Code and date/time value parameter pair" />
  <expression value="Observation" />
  <xpathUsage value="normal" />
  <component>
    <definition>
      <reference value="http://hl7.org/fhir/SearchParameter/Observation-code" />
    </definition>
    <expression value="code" />
  </component>
  <component>
    <definition>
      <reference value="http://hl7.org/fhir/SearchParameter/Observation-value-date" />
    </definition>
    <expression value="value.as(DateTime) | value.as(Period)" />
  </component>
</SearchParameter>