<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://example.org/fhir/StructureDefinition/ProfilingAcademyHospitalXOptInStatus" />
  <name value="ProfilingAcademyHospitalXOptInStatus" />
  <status value="draft" />
  <fhirVersion value="4.0.0" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="Patient" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <differential>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Extension.extension:clinicalTrialNumber">
      <path value="Extension.extension" />
      <sliceName value="clinicalTrialNumber" />
    </element>
    <element id="Extension.extension:clinicalTrialNumber.value[x]">
      <path value="Extension.extension.value[x]" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element id="Extension.extension:periodOfInvolvement">
      <path value="Extension.extension" />
      <sliceName value="periodOfInvolvement" />
    </element>
    <element id="Extension.extension:periodOfInvolvement.value[x]">
      <path value="Extension.extension.value[x]" />
      <type>
        <code value="Period" />
      </type>
    </element>
    <element id="Extension.extension:reasonForEnrollment">
      <path value="Extension.extension" />
      <sliceName value="reasonForEnrollment" />
    </element>
    <element id="Extension.extension:reasonForEnrollment.value[x]">
      <path value="Extension.extension.value[x]" />
      <type>
        <code value="CodeableConcept" />
      </type>
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>