<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="4745ca9d-825c-46e7-bac7-9a1e1a10cfce" />
  <meta>
    <lastUpdated value="2022-01-12T04:29:35.896+00:00" />
  </meta>
  <url value="http://ehealthontario.ca/fhir/StructureDefinition/ca-on-lab-ext-sort-key" />
  <name value="SortKey" />
  <status value="active" />
  <date value="2022-01-12T04:28:00.3301862+00:00" />
  <description value="Sort key values allow laboratories to suggest the sequence of test requests and observations within a single order or test request to organize the display of the patient report by other external systems (e.g., a practitioner’s electronic medical record system)." />
  <purpose value="To allow laboratories to suggest the sequence of test requests and observations." />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="ServiceRequest" />
  </context>
  <context>
    <type value="element" />
    <expression value="Observation" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension">
      <path value="Extension" />
      <max value="1" />
      <isModifier value="false" />
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="http://ehealthontario.ca/fhir/StructureDefinition/ca-on-lab-ext-sort-key" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <slicing>
        <discriminator>
          <type value="type" />
          <path value="$this" />
        </discriminator>
      </slicing>
      <type>
        <code value="string" />
      </type>
    </element>
  </differential>
</StructureDefinition>