<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://fhir.nhs.uk/StructureDefinition/England-Slot" />
  <name value="EnglandSlot" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Slot" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Slot" />
  <derivation value="constraint" />
  <differential>
    <element id="Slot.identifier">
      <path value="Slot.identifier" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="system" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <min value="1" />
    </element>
    <element id="Slot.identifier.value">
      <path value="Slot.identifier.value" />
      <min value="1" />
    </element>
    <element id="Slot.identifier:alternativeSlot">
      <path value="Slot.identifier" />
      <sliceName value="alternativeSlot" />
      <short value="Alternative Slot" />
      <definition value="PAS systems unique reference for the slot provided by the provider (only present when there is a current appointment booking to a Directly Bookable Service)" />
      <max value="1" />
    </element>
    <element id="Slot.identifier:alternativeSlot.system">
      <path value="Slot.identifier.system" />
      <min value="1" />
      <fixedUri value="https://fhir.nhs.uk/CodeSystem/unique-slot-reference-number" />
    </element>
    <element id="Slot.identifier:alternativeSlot.value">
      <path value="Slot.identifier.value" />
      <min value="1" />
    </element>
  </differential>
</StructureDefinition>