<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://fhir.nhs.uk/StructureDefinition/Extension-eRS-ServiceRequest-State" />
  <name value="ExtensionNHSDigitaleRSReferralState" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="ServiceRequest" />
  </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" />
    </element>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <min value="0" />
    </element>
    <element id="Extension.extension:state">
      <path value="Extension.extension" />
      <sliceName value="state" />
      <definition value="Defining state" />
      <min value="0" />
      <max value="1" />
    </element>
    <element id="Extension.extension:state.url">
      <path value="Extension.extension.url" />
      <fixedUri value="state" />
    </element>
    <element id="Extension.extension:state.value[x]">
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="Coding" />
      </type>
      <binding>
        <strength value="required" />
        <valueSet value="https://fhir.nhs.uk/ValueSet/NHSDigital-eRS-ReferralState" />
      </binding>
    </element>
    <element id="Extension.extension:state.value[x].system">
      <path value="Extension.extension.value[x].system" />
      <min value="1" />
      <fixedUri value="https://fhir.nhs.uk/CodeSystem/eRS-ReferralState" />
    </element>
    <element id="Extension.extension:state.value[x].code">
      <path value="Extension.extension.value[x].code" />
      <min value="1" />
    </element>
    <element id="Extension.extension:reason">
      <path value="Extension.extension" />
      <sliceName value="reason" />
      <min value="0" />
      <max value="1" />
    </element>
    <element id="Extension.extension:reason.url">
      <path value="Extension.extension.url" />
      <fixedUri value="reason" />
    </element>
    <element id="Extension.extension:reason.value[x]">
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="Coding" />
      </type>
      <binding>
        <strength value="extensible" />
        <valueSet value="https://fhir.nhs.uk/ValueSet/NHSDigital-eRS-AppointmentCancellationReason" />
      </binding>
    </element>
    <element id="Extension.extension:reason.value[x].system">
      <path value="Extension.extension.value[x].system" />
      <min value="1" />
      <fixedUri value="https://fhir.nhs.uk/CodeSystem/NHSDigital-AppointmentCancellationReason" />
    </element>
    <element id="Extension.extension:reason.value[x].code">
      <path value="Extension.extension.value[x].code" />
      <min value="1" />
    </element>
    <element id="Extension.extension:comments">
      <path value="Extension.extension" />
      <sliceName value="comments" />
      <min value="0" />
      <max value="1" />
    </element>
    <element id="Extension.extension:comments.url">
      <path value="Extension.extension.url" />
      <fixedUri value="comments" />
    </element>
    <element id="Extension.extension:comments.value[x]">
      <path value="Extension.extension.value[x]" />
      <min value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element id="Extension.extension:stateResource">
      <path value="Extension.extension" />
      <sliceName value="stateResource" />
      <min value="0" />
      <max value="1" />
    </element>
    <element id="Extension.extension:stateResource.url">
      <path value="Extension.extension.url" />
      <fixedUri value="stateResource" />
    </element>
    <element id="Extension.extension:stateResource.value[x]">
      <path value="Extension.extension.value[x]" />
      <type>
        <code value="Reference" />
        <targetProfile value="https://fhir.nhs.uk/StructureDefinition/NHSDigital-Task" />
        <targetProfile value="https://fhir.nhs.uk/StructureDefinition/NHSDigital-Appointment" />
      </type>
    </element>
    <element id="Extension.url">
      <path value="Extension.url" />
      <fixedUri value="https://fhir.nhs.uk/StructureDefinition/Extension-eRS-ServiceRequest-State" />
    </element>
    <element id="Extension.value[x]">
      <path value="Extension.value[x]" />
      <max value="0" />
    </element>
  </differential>
</StructureDefinition>