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Packagede.basisprofil.r4
Resource TypeStructureDefinition
IdStructureDefinition-identifier-iknr.json
FHIR VersionR4
Sourcehttps://simplifier.net/resolve?scope=de.basisprofil.r4@1.6.0&canonical=http://fhir.de/StructureDefinition/identifier-iknr
URLhttp://fhir.de/StructureDefinition/identifier-iknr
Version1.6.0
Statusactive
Date2025-12-23
NameIdentifierIknr
TitleIdentifier-Profil für die Abbildung eines Institutionskennzeichens (IKNR)
Authorityhl7
DescriptionIdentifier-Profil für die Abbildung eines Institutionskennzeichens (IKNR)
TypeIdentifier
Kindcomplex-type

Resources that use this resource

StructureDefinition
de.fhir.sterbefall-krebsregistermeldung#currentStfOrganisationSTF Organisation
de.gematik.ti#1.3.1ti-organizationTI Organization
kbv.ita.erp#1.4.4KBV_EX_ERP_PracticeSupply_PayorKBV_EX_ERP_PracticeSupply_Payor
kbv.mio.laborbefund#1.0.0-updateKBV_PR_MIO_LAB_OrganizationKBV_PR_MIO_LAB_Organization
kbv.basis.ressources.only#1.7.0KBV_PR_Base_OrganizationKBV_PR_Base_Organization
kbv.ita.vos#2.2.0-kommentierung2KBV_PR_VoS_CoverageKBV_PR_VoS_Coverage
de.gkvsv.evp#1.0.1GKVSV_EX_EVP_AbsenderAbsender
de.gkvsv.evp#1.0.1GKVSV_EX_EVP_EmpfaengerEmpfaenger
tiplu.maia.schnittstellendefinition#1.2.0MaiaGesundheitseinrichtungMaia Gesundheitseinrichtung
de.gematik.erezept-workflow.r4#1.6.4GEM_ERP_EX_InsuranceProviderGEM_ERP_EX_InsuranceProvider
de.gematik.erezept-patientenrechnung.r4#1.1.0GEM_ERPCHRG_PR_ConsentGEM_ERPCHRG_PR_Consent
de.gematik.dipag#1.0.8dipag-institutionDigitale Patientenrechnung Institution
de.gematik.dipag#1.0.8dipag-patientDiPagPatient
de.gematik.directory#0.11.26OrganizationDirectoryOrganization in gematik Directory
de.gematik.elektronische-versicherungsbescheinigung#1.0.1EEBCoverageEgkEEBCoverageEgk
de.gematik.elektronische-versicherungsbescheinigung#1.0.1EEBCoverageEgkNoAddressLineEEBCoverageEgkNoAddressLine
de.gematik.elektronische-versicherungsbescheinigung#1.0.1EEBCoverageNoEgkEEBCoverageNoEgk
de.gematik.elektronische-versicherungsbescheinigung#1.0.1InstitutionskennzeichenInstitutionskennzeichen
de.gematik.sterbefall#1.0.2StfOrganisationSTF Organisation
rki.demis.ars#1.0.0-rc.2HospitalKrankenhausstandort
de.medizininformatikinitiative.kerndatensatz.person#2025.0.1PatientPseudonymisiertMII PR Person Patient (Pseudonymisiert)
de.medizininformatikinitiative.kerndatensatz.person#2025.0.1PatientMII PR Person Patient
elb.ck.private#0.0.1KK_ELB_ChargeItemKK_ELB_ChargeItem
elb.ck.private#0.0.1KK_ELB_PayorKK_ELB_Payor
elb.ck.private#0.0.1KK_ELB_PollingRequestKK_ELB_PollingRequest
elb.ck.private#0.0.1KK_ELB_ResponseCompositionKK_ELB_ResponseComposition
elb.ck.private#0.0.1KK_ELB_ResponseDocumentBundleKK_ELB_ResponseDocumentBundle
ma.ambulanter.fall#2.0.0MaPatientPatient
de.gevko.dev.tetvz#1.1.2EX_OSC_BetreuerEX_OSC_Betreuer
de.gevko.dev.tetvz#1.1.2EX_OSC_ErsteinschreibungEX_OSC_Ersteinschreibung
de.gevko.dev.tetvz#1.1.2EX_OSC_ZeitraumEX_OSC_Zeitraum
de.gevko.dev.tetvz#1.1.2PR_OSC_PatientPR_OSC_Patient
de.gevko.dev.tetvz#1.1.2PR_OSC_PractitionerPR_OSC_Practitioner
de.gematik.isip#1.0.2IsipOrganizationIsipOrganization
de.gematik.isik#5.1.3ISiKOrganisationISiKOrganisation
de.gematik.isik#5.1.3ISiKVersicherungsverhaeltnisGesetzlichISiKVersicherungsverhaeltnisGesetzlich
dguv.basis#1.5.0DGUV-Basis-PR-BehandelndeEinrichtungBehandelnde Einrichtung
dguv.basis#1.5.0DGUV-Basis-PR-KrankenkasseKrankenkasse
dguv.basis#1.5.0DGUV-Basis-PR-PflegekassePflegekasse
dguv.basis#1.5.0DGUV-Basis-PR-UnfallversicherungstraegerUnfallversicherungsträger
fhir.bfarm.de#3.0.1HealthAppManufacturerHealthAppManufacturer
de.gematik.isik-basismodul#3.1.1ISiKVersicherungsverhaeltnisGesetzlichISiKVersicherungsverhaeltnisGesetzlich
de.basisprofil.r4#1.6.0AbrechnendeIKExtensionAbrechnendeIK
de.basisprofil.r4#1.6.0coverage-de-gkvCoverage, deutsches GKV-Profil
de.basisprofil.r4#1.6.0identifier-pkvIdentifier-Profil für die Abbildung einer Privatversichertennummer
de.gematik.isik-basismodul-stufe1#1.0.10ISiKVersicherungsverhaeltnisGesetzlichISiKVersicherungsverhaeltnisGesetzlich
rki.emiga.vzd#2.0.0-alpha.23EmigaDepartmentOrganizationFachabteilung
rki.emiga.vzd#2.0.0-alpha.23EmigaHospitalFacilityLocationKrankenhaus - Einrichtungsstandort
rki.emiga.vzd#2.0.0-alpha.23EmigaHospitalLocationKrankenhaus - Standort
rki.emiga.vzd#2.0.0-alpha.23EmigaHospitalOrganizationKrankenhaus
rki.emiga.vzd#2.0.0-alpha.23EmigaLocationEMIGA Bereich / Standort
rki.emiga.vzd#2.0.0-alpha.23EmigaOrganizationEMIGA Organization
de.gematik.erezept.eu#1.1.2GEM_ERPEU_PR_ConsentConsent for ePrescriptions
de.gematik.vsdm2#1.1.0VSDMCoverageGKVBaseVersicherungsdaten GKV (Basis)
de.gematik.vsdm2#1.1.0VSDMPayorOrganizationKostenträger
ishmed.i14y.r4.de#3.0.0OrganizationCoreDeOrganization Profile Germany
kbv.ita.for#1.3.1KBV_EX_FOR_Alternative_IKKBV_EX_FOR_Alternative_IK
kbv.ita.for#1.3.1KBV_PR_FOR_CoverageKBV_PR_FOR_Coverage
de.abda.erezeptabgabedatenbasis#1.5.0DAV-PR-Base-ApothekeDAV_PR_Base_Apotheke
kbv.ita.aws#1.2.0KBV_PR_AW_KrankenversicherungsverhaeltnisKBV_PR_AW_Krankenversicherungsverhaeltnis
de.thieme-compliance.anamnese#0.0.2-devEcpKostentraegerECP Kostenträger
de.thieme-compliance.anamnese#0.0.2-devEcpVersicherungsverhaeltnisECP Versicherungsverhältnis

Resources that this resource uses

ValueSet
de.gkvsv.evp#1.0.1identifier-type-de-basisIdentifierTypeDeBasis

Narrative

No narrative content found in resource


Source1

{
  "resourceType": "StructureDefinition",
  "id": "identifier-iknr",
  "url": "http://fhir.de/StructureDefinition/identifier-iknr",
  "version": "1.6.0",
  "name": "IdentifierIknr",
  "title": "Identifier-Profil für die Abbildung eines Institutionskennzeichens (IKNR)",
  "status": "active",
  "experimental": false,
  "date": "2025-12-23",
  "publisher": "HL7 Deutschland e.V. (Technisches Komitee FHIR)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.de/technische-komitees/fhir/"
        }
      ]
    }
  ],
  "description": "Identifier-Profil für die Abbildung eines Institutionskennzeichens (IKNR)",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "type": "Identifier",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Identifier",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Identifier",
        "path": "Identifier",
        "short": "An identifier intended for computation",
        "definition": "An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers.",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Identifier",
          "min": 0,
          "max": "*"
        },
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "CX / EI (occasionally, more often EI maps to a resource id or a URL)"
          },
          {
            "identity": "rim",
            "map": "II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs.  Also maps to Role[classCode=IDENT]"
          },
          {
            "identity": "servd",
            "map": "Identifier"
          }
        ]
      },
      {
        "id": "Identifier.id",
        "path": "Identifier.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "string"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Identifier.extension",
        "path": "Identifier.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Identifier.use",
        "path": "Identifier.use",
        "short": "usual | official | temp | secondary | old (If known)",
        "definition": "The purpose of this identifier.",
        "comment": "Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.",
        "requirements": "Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Identifier.use",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": true,
        "isModifierReason": "This is labeled as \"Is Modifier\" because applications should not mistake a temporary id for a permanent one.",
        "isSummary": true,
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "IdentifierUse"
            }
          ],
          "strength": "required",
          "description": "Identifies the purpose for this identifier, if known .",
          "valueSet": "http://hl7.org/fhir/ValueSet/identifier-use|4.0.1"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "N/A"
          },
          {
            "identity": "rim",
            "map": "Role.code or implied by context"
          }
        ]
      },
      {
        "id": "Identifier.type",
        "path": "Identifier.type",
        "short": "Description of identifier",
        "definition": "A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.",
        "comment": "This element deals only with general categories of identifiers.  It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage.   Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.",
        "requirements": "Allows users to make use of identifiers when the identifier system is not known.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Identifier.type",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "patternCodeableConcept": {
          "coding": [
            {
              "system": "http://terminology.hl7.org/CodeSystem/v2-0203",
              "code": "XX"
            }
          ]
        },
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isSummary": true,
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "IdentifierType"
            }
          ],
          "strength": "extensible",
          "description": "A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.",
          "valueSet": "http://fhir.de/ValueSet/identifier-type-de-basis"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "CE/CNE/CWE"
          },
          {
            "identity": "rim",
            "map": "CD"
          },
          {
            "identity": "orim",
            "map": "fhir:CodeableConcept rdfs:subClassOf dt:CD"
          },
          {
            "identity": "v2",
            "map": "CX.5"
          },
          {
            "identity": "rim",
            "map": "Role.code or implied by context"
          }
        ]
      },
      {
        "id": "Identifier.system",
        "path": "Identifier.system",
        "short": "The namespace for the identifier value",
        "definition": "Establishes the namespace for the value - that is, a URL that describes a set values that are unique.",
        "comment": "Identifier.system is always case sensitive.",
        "requirements": "There are many sets  of identifiers.  To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Identifier.system",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "http://fhir.de/sid/arge-ik/iknr",
        "example": [
          {
            "label": "General",
            "valueUri": "http://www.acme.com/identifiers/patient"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "CX.4 / EI-2-4"
          },
          {
            "identity": "rim",
            "map": "II.root or Role.id.root"
          },
          {
            "identity": "servd",
            "map": "./IdentifierType"
          }
        ]
      },
      {
        "id": "Identifier.value",
        "path": "Identifier.value",
        "short": "The value that is unique",
        "definition": "The portion of the identifier typically relevant to the user and which is unique within the context of the system.",
        "comment": "If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986.  The value's primary purpose is computational mapping.  As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.)  A value formatted for human display can be conveyed using the [Rendered Value extension](extension-rendered-value.html). Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Identifier.value",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "example": [
          {
            "label": "General",
            "valueString": "123456"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ik-1",
            "severity": "warning",
            "human": "Eine IK muss eine numerische 9-stellige Zeichenkette (mit Prüfziffer) sein",
            "expression": "matches('^[0-9]{9}[%content%]#39;)",
            "source": "http://fhir.de/StructureDefinition/identifier-iknr"
          }
        ],
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "CX.1 / EI.1"
          },
          {
            "identity": "rim",
            "map": "II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)"
          },
          {
            "identity": "servd",
            "map": "./Value"
          }
        ]
      },
      {
        "id": "Identifier.period",
        "path": "Identifier.period",
        "short": "Time period when id is/was valid for use",
        "definition": "Time period during which identifier is/was valid for use.",
        "comment": "A Period specifies a range of time; the context of use will specify whether the entire range applies (e.g. \"the patient was an inpatient of the hospital for this time range\") or one value from the range applies (e.g. \"give to the patient between these two times\").\n\nPeriod is not used for a duration (a measure of elapsed time). See [Duration](datatypes.html#Duration).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Identifier.period",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Period"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "per-1",
            "severity": "error",
            "human": "If present, start SHALL have a lower value than end",
            "expression": "start.hasValue().not() or end.hasValue().not() or (start <= end)",
            "xpath": "not(exists(f:start/@value)) or not(exists(f:end/@value)) or (xs:dateTime(f:start/@value) <= xs:dateTime(f:end/@value))",
            "source": "http://hl7.org/fhir/StructureDefinition/Period"
          }
        ],
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "DR"
          },
          {
            "identity": "rim",
            "map": "IVL<TS>[lowClosed=\"true\" and highClosed=\"true\"] or URG<TS>[lowClosed=\"true\" and highClosed=\"true\"]"
          },
          {
            "identity": "v2",
            "map": "CX.7 + CX.8"
          },
          {
            "identity": "rim",
            "map": "Role.effectiveTime or implied by context"
          },
          {
            "identity": "servd",
            "map": "./StartDate and ./EndDate"
          }
        ]
      },
      {
        "id": "Identifier.assigner",
        "path": "Identifier.assigner",
        "short": "Organization that issued id (may be just text)",
        "definition": "Organization that issued/manages the identifier.",
        "comment": "The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Identifier.assigner",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/StructureDefinition/Organization"
            ]
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ref-1",
            "severity": "error",
            "human": "SHALL have a contained resource if a local reference is provided",
            "expression": "reference.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))",
            "xpath": "not(starts-with(f:reference/@value, '#')) or exists(ancestor::*[self::f:entry or self::f:parameter]/f:resource/f:*/f:contained/f:*[f:id/@value=substring-after(current()/f:reference/@value, '#')]|/*/f:contained/f:*[f:id/@value=substring-after(current()/f:reference/@value, '#')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Reference"
          }
        ],
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "The target of a resource reference is a RIM entry point (Act, Role, or Entity)"
          },
          {
            "identity": "v2",
            "map": "CX.4 / (CX.4,CX.9,CX.10)"
          },
          {
            "identity": "rim",
            "map": "II.assigningAuthorityName but note that this is an improper use by the definition of the field.  Also Role.scoper"
          },
          {
            "identity": "servd",
            "map": "./IdentifierIssuingAuthority"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Identifier.type",
        "path": "Identifier.type",
        "patternCodeableConcept": {
          "coding": [
            {
              "system": "http://terminology.hl7.org/CodeSystem/v2-0203",
              "code": "XX"
            }
          ]
        },
        "binding": {
          "strength": "extensible",
          "valueSet": "http://fhir.de/ValueSet/identifier-type-de-basis"
        }
      },
      {
        "id": "Identifier.system",
        "path": "Identifier.system",
        "min": 1,
        "fixedUri": "http://fhir.de/sid/arge-ik/iknr"
      },
      {
        "id": "Identifier.value",
        "path": "Identifier.value",
        "min": 1,
        "constraint": [
          {
            "key": "ik-1",
            "severity": "warning",
            "human": "Eine IK muss eine numerische 9-stellige Zeichenkette (mit Prüfziffer) sein",
            "expression": "matches('^[0-9]{9}[%content%]#39;)",
            "source": "http://fhir.de/StructureDefinition/identifier-iknr"
          }
        ]
      }
    ]
  }
}