<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="http://electronichealth.se/fhir/StructureDefinition/SequenceDuration" />
  <name value="SequenceDuration" />
  <status value="draft" />
  <fhirVersion value="4.0.0" />
  <kind value="complex-type" />
  <abstract value="false" />
  <type value="Quantity" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Quantity" />
  <derivation value="constraint" />
  <differential>
    <element id="Quantity">
      <path value="Quantity" />
      <mustSupport value="true" />
    </element>
    <element id="Quantity.value">
      <path value="Quantity.value" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Quantity.comparator">
      <path value="Quantity.comparator" />
      <max value="0" />
    </element>
    <element id="Quantity.code">
      <path value="Quantity.code" />
      <min value="1" />
      <fixedCode value="d" />
      <mustSupport value="true" />
      <binding>
        <strength value="required" />
        <valueSet value="http://electronichealth.se/fhir/ValueSet/nll-sequence-length-unit" />
      </binding>
    </element>
  </differential>
</StructureDefinition>