<status value="active"/> <date value="2026-10-20T08:51:36+00:00"/> <publisher value="HL7® Austria, TC FHIR®"/> <contact> <name value="HL7® Austria, TC FHIR®"/> <telecom> <system value="url"/> <value value="https://hl7.at/technische-komitees/tc-fhir/"/> </telecom> </contact> <contact> <name value="Technical Committee for FHIR® at HL7® Austria"/> <telecom> <system value="email"/> <value value="mailto:tc-fhir@hl7.at"/> </telecom> </contact> <description value="HL7® Austria FHIR® Core Extension for the municipality key (Gemeindekennziffer) part of the Austrian address. The municipality key is related to the [municipality code (Gemeindecode)](StructureDefinition-at-core-ext-address-municipalityCode.html). While these two are generally identical, there is one notable exception: in Vienna, the municipality key (Gemeindekennziffer) is consistently 90001, whereas the municipality code (Gemeindecode) varies by district. The current list of values is provided by [Statistik Austria](https://www.statistik.at/verzeichnis/reglisten/gemliste_knz.pdf)."/> <fhirVersion value="5.0.0"/> <mapping> <identity value="rim"/> <uri value="http://hl7.org/v3"/> <name value="RIM Mapping"/> </mapping> <kind value="complex-type"/> <abstract value="false"/> <context> <type value="element"/> <expression value="Address"/> </context> <context> <type value="element"/> <expression value="https://fhir.hl7.at/core/r5/StructureDefinition/at-core-address#Address"/> </context> <type value="Extension"/> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension"/> <derivation value="constraint"/> <snapshot> <extension url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version"> <valueString value="5.0.0"/> </extension> <element id="Extension"> <path value="Extension"/> <short value="Gemeindekennziffer (GKZ)"/> <definition value="The Gemeindekennziffer (GKZ) of the Austrian municipality the address belongs to, as published by Statistics Austria (Statistik Austria). It is generally identical to the municipality code (Gemeindecode), except in Vienna, where the Gemeindekennziffer is 90001 for the whole city while the Gemeindecode varies by district."/> <min value="0"/> <max value="*"/> <base> <path value="Extension"/> <min value="0"/> <max value="*"/> </base> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> </element> <element id="Extension.id"> <path value="Extension.id"/> <representation value="xmlAttr"/> <short value="Unique id for inter-element referencing"/> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="id"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <condition value="ele-1"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Extension.extension"> <path value="Extension.extension"/> <slicing> <discriminator> <type value="value"/> <path value="url"/> </discriminator> <description value="Extensions are always sliced by (at least) url"/> <rules value="open"/> </slicing> <short value="Extension"/> <definition value="An Extension"/> <min value="0"/> <max value="0"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> </element> <element id="Extension.url"> <path value="Extension.url"/> <representation value="xmlAttr"/> <short value="identifies the meaning of the extension"/> <definition value="Source of the definition for the extension code - a logical name or a URL."/> <comment value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/> <min value="1"/> <max value="1"/> <base> <path value="Extension.url"/> <min value="1"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <fixedUri value="https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="N/A"/> </mapping> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]"/> <short value="Value of extension"/> <definition value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R5/extensibility.html) for a list)."/> <min value="1"/> <max value="1"/> <base> <path value="Extension.value[x]"/> <min value="0"/> <max value="1"/> </base> <type> <code value="string"/> </type> <condition value="ext-1"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="N/A"/> </mapping> </element> </snapshot> <differential> <element id="Extension"> <path value="Extension"/> <short value="Gemeindekennziffer (GKZ)"/> <definition value="The Gemeindekennziffer (GKZ) of the Austrian municipality the address belongs to, as published by Statistics Austria (Statistik Austria). It is generally identical to the municipality code (Gemeindecode), except in Vienna, where the Gemeindekennziffer is 90001 for the whole city while the Gemeindecode varies by district."/> </element> <element id="Extension.extension"> <path value="Extension.extension"/> <max value="0"/> </element> <element id="Extension.url"> <path value="Extension.url"/> <fixedUri value="https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey"/> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]"/> <min value="1"/> <type> <code value="string"/> </type> </element> </differential> </StructureDefinition>

Generated Narrative: StructureDefinition at-core-ext-address-municipalityKey

Name	Card.	Type	Description & Constraints
Extension	0..*	Extension	Gemeindekennziffer (GKZ)
Extension.extension	0..0		Extension
Extension.url	1..1	uri	"https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey"
Extension.value[x]	1..1	string	Value of extension
Documentation for this format

<status value="active"/> <date value="2026-10-20T08:51:36+00:00"/> <publisher value="HL7® Austria, TC FHIR®"/> <contact> <name value="HL7® Austria, TC FHIR®"/> <telecom> <system value="url"/> <value value="https://hl7.at/technische-komitees/tc-fhir/"/> </telecom> </contact> <contact> <name value="Technical Committee for FHIR® at HL7® Austria"/> <telecom> <system value="email"/> <value value="mailto:tc-fhir@hl7.at"/> </telecom> </contact> <description value="HL7® Austria FHIR® Core Extension for the municipality key (Gemeindekennziffer) part of the Austrian address. The municipality key is related to the [municipality code (Gemeindecode)](StructureDefinition-at-core-ext-address-municipalityCode.html). While these two are generally identical, there is one notable exception: in Vienna, the municipality key (Gemeindekennziffer) is consistently 90001, whereas the municipality code (Gemeindecode) varies by district. The current list of values is provided by [Statistik Austria](https://www.statistik.at/verzeichnis/reglisten/gemliste_knz.pdf)."/> <fhirVersion value="5.0.0"/> <mapping> <identity value="rim"/> <uri value="http://hl7.org/v3"/> <name value="RIM Mapping"/> </mapping> <kind value="complex-type"/> <abstract value="false"/> <context> <type value="element"/> <expression value="Address"/> </context> <context> <type value="element"/> <expression value="https://fhir.hl7.at/core/r5/StructureDefinition/at-core-address#Address"/> </context> <type value="Extension"/> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension"/> <derivation value="constraint"/> <snapshot> <extension url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version"> <valueString value="5.0.0"/> </extension> <element id="Extension"> <path value="Extension"/> <short value="Gemeindekennziffer (GKZ)"/> <definition value="The Gemeindekennziffer (GKZ) of the Austrian municipality the address belongs to, as published by Statistics Austria (Statistik Austria). It is generally identical to the municipality code (Gemeindecode), except in Vienna, where the Gemeindekennziffer is 90001 for the whole city while the Gemeindecode varies by district."/> <min value="0"/> <max value="*"/> <base> <path value="Extension"/> <min value="0"/> <max value="*"/> </base> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> </element> <element id="Extension.id"> <path value="Extension.id"/> <representation value="xmlAttr"/> <short value="Unique id for inter-element referencing"/> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="id"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <condition value="ele-1"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Extension.extension"> <path value="Extension.extension"/> <slicing> <discriminator> <type value="value"/> <path value="url"/> </discriminator> <description value="Extensions are always sliced by (at least) url"/> <rules value="open"/> </slicing> <short value="Extension"/> <definition value="An Extension"/> <min value="0"/> <max value="0"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> </element> <element id="Extension.url"> <path value="Extension.url"/> <representation value="xmlAttr"/> <short value="identifies the meaning of the extension"/> <definition value="Source of the definition for the extension code - a logical name or a URL."/> <comment value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/> <min value="1"/> <max value="1"/> <base> <path value="Extension.url"/> <min value="1"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <fixedUri value="https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="N/A"/> </mapping> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]"/> <short value="Value of extension"/> <definition value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R5/extensibility.html) for a list)."/> <min value="1"/> <max value="1"/> <base> <path value="Extension.value[x]"/> <min value="0"/> <max value="1"/> </base> <type> <code value="string"/> </type> <condition value="ext-1"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="N/A"/> </mapping> </element> </snapshot> <differential> <element id="Extension"> <path value="Extension"/> <short value="Gemeindekennziffer (GKZ)"/> <definition value="The Gemeindekennziffer (GKZ) of the Austrian municipality the address belongs to, as published by Statistics Austria (Statistik Austria). It is generally identical to the municipality code (Gemeindecode), except in Vienna, where the Gemeindekennziffer is 90001 for the whole city while the Gemeindecode varies by district."/> </element> <element id="Extension.extension"> <path value="Extension.extension"/> <max value="0"/> </element> <element id="Extension.url"> <path value="Extension.url"/> <fixedUri value="https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey"/> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]"/> <min value="1"/> <type> <code value="string"/> </type> </element> </differential> </StructureDefinition>