<StructureDefinition xmlns="http://hl7.org/fhir">
  <url value="https://example.org/fhir/StructureDefinition/MyPatient" />
  <name value="MyPatient" />
  <status value="draft" />
  <date value="2023-01-31T11:12:14.1561195+00:00" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Patient" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Patient" />
  <derivation value="constraint" />
  <differential>
    <element id="Patient.identifier">
      <path value="Patient.identifier" />
      <slicing>
        <discriminator>
          <type value="pattern" />
          <path value="$this" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Patient.identifier:BuergerId">
      <path value="Patient.identifier" />
      <sliceName value="BuergerId" />
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Patient.identifier:BuergerId.type">
      <path value="Patient.identifier.type" />
      <mustSupport value="false" />
    </element>
    <element id="Patient.identifier:BuergerId.system">
      <path value="Patient.identifier.system" />
      <min value="1" />
      <fixedUri value="http://fhir.ufp/sid/ufp-citizen-id" />
    </element>
    <element id="Patient.identifier:BuergerId.value">
      <path value="Patient.identifier.value" />
      <min value="1" />
      <mustSupport value="false" />
    </element>
    <element id="Patient.identifier:VersichertenId">
      <path value="Patient.identifier" />
      <sliceName value="VersichertenId" />
      <max value="1" />
    </element>
    <element id="Patient.identifier:VersichertenId.system">
      <path value="Patient.identifier.system" />
      <min value="1" />
      <fixedUri value="http://fhir.de/sid/gkv/kvid-10" />
      <mustSupport value="true" />
    </element>
    <element id="Patient.identifier:VersichertenId.value">
      <path value="Patient.identifier.value" />
      <min value="1" />
      <condition value="kvid-1" />
      <constraint>
        <key value="kvid-1" />
        <severity value="warning" />
        <human value="Dies ist keine Versichertennummer!" />
        <expression value="matches('^[A-Z][0-9]{9}$')" />
      </constraint>
    </element>
    <element id="Patient.name.family">
      <path value="Patient.name.family" />
      <min value="1" />
    </element>
    <element id="Patient.birthDate">
      <path value="Patient.birthDate" />
      <min value="1" />
    </element>
  </differential>
</StructureDefinition>