<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://e-lb.de/fhir/StructureDefinition/KK_ELB_Identifier_LBNR" />
  <version value="1.0.0" />
  <name value="KK_ELB_Identifier_LBNR" />
  <status value="draft" />
  <fhirVersion value="4.0.1" />
  <kind value="complex-type" />
  <abstract value="false" />
  <type value="Identifier" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Identifier" />
  <derivation value="constraint" />
  <differential>
    <element id="Identifier.system">
      <path value="Identifier.system" />
      <min value="1" />
      <fixedUri value="http://fhir.de/sid/bfarm/lbnr" />
      <mustSupport value="true" />
    </element>
    <element id="Identifier.value">
      <path value="Identifier.value" />
      <min value="1" />
      <constraint>
        <key value="LaengeLBNR" />
        <severity value="error" />
        <human value="Eine LBNR muss neunstellig numerisch sein." />
        <expression value="matches('^[0-9]{9}$')" />
      </constraint>
      <mustSupport value="true" />
    </element>
  </differential>
</StructureDefinition>