<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="Issue01Appointment" />
  <url value="http://acme.com/StructureDefinition/Issue01/Appointment" />
  <name value="Issue01Appointment" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Appointment" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Appointment" />
  <derivation value="constraint" />
  <differential>
    <element id="Appointment.participant.actor">
      <path value="Appointment.participant.actor" />
      <min value="1" />
      <type>
        <code value="Reference" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/PractitionerRole" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/HealthcareService" />
        <targetProfile value="http://hl7.org/fhir/StructureDefinition/Location" />
        <targetProfile value="http://acme.com/StructureDefinition/Issue01/Practitioner" />
        <targetProfile value="http://acme.com/StructureDefinition/Issue01/Patient" />
      </type>
    </element>
  </differential>
</StructureDefinition>