<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="researchStudy-siteRecruitment" />
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="brr" />
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="0" />
  </extension>
  <url value="http://hl7.org/fhir/StructureDefinition/researchStudy-siteRecruitment" />
  <version value="4.6.0" />
  <name value="siteRecruitment" />
  <title value="siteRecruitment" />
  <status value="draft" />
  <date value="2021-03-31T00:00:00+00:00" />
  <publisher value="HL7" />
  <description value="Target and actual numbers of sites for a study." />
  <fhirVersion value="4.6.0" />
  <mapping>
    <identity value="rim" />
    <uri value="http://hl7.org/v3" />
    <name value="RIM Mapping" />
  </mapping>
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="ResearchStudy" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension">
      <path value="Extension" />
      <short value="Target and actual numbers of sites for a study" />
      <definition value="Target and actual numbers of sites for a study." />
      <comment value="Using Group for sites in the same way as for subjects would be appropriate but would need to extend Group to allow this." />
      <min value="0" />
      <max value="1" />
    </element>
    <!-- targetNumber -->
    <element id="Extension.extension:targetNumber">
      <path value="Extension.extension" />
      <sliceName value="targetNumber" />
      <short value="The desired number of sites" />
      <definition value="The desired number of sites." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element id="Extension.extension:targetNumber.extension">
      <path value="Extension.extension.extension" />
      <max value="0" />
    </element>
    <element id="Extension.extension:targetNumber.url">
      <path value="Extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="targetNumber" />
    </element>
    <element id="Extension.extension:targetNumber.value[x]">
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="unsignedInt" />
      </type>
    </element>
    <!-- actualNumber -->
    <element id="Extension.extension:actualNumber">
      <path value="Extension.extension" />
      <sliceName value="actualNumber" />
      <short value="The actual number of sites" />
      <definition value="The actual number of sites." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element id="Extension.extension:actualNumber.extension">
      <path value="Extension.extension.extension" />
      <max value="0" />
    </element>
    <element id="Extension.extension:actualNumber.url">
      <path value="Extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="actualNumber" />
    </element>
    <element id="Extension.extension:actualNumber.value[x]">
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="unsignedInt" />
      </type>
    </element>
    <!-- eligibility -->
    <element id="Extension.extension:eligibility">
      <path value="Extension.extension" />
      <sliceName value="eligibility" />
      <short value="Inclusion and exclusion criteria" />
      <definition value="Criteria for inclusion or exclusion of sites." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element id="Extension.extension:eligibility.extension">
      <path value="Extension.extension.extension" />
      <max value="0" />
    </element>
    <element id="Extension.extension:eligibility.url">
      <path value="Extension.extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="eligibility" />
    </element>
    <element id="Extension.extension:eligibility.value[x]">
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="markdown" />
      </type>
    </element>
    <!-- Wrap up -->
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/patient-animal" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <min value="0" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>