HL7® Austria FHIR® Core Implementation Guide
2.1.0 - STU3
HL7® Austria FHIR® Core Implementation Guide
2.1.0 - STU3
HL7® Austria FHIR® Core Implementation Guide, published by HL7® Austria, TC FHIR®. This guide is not an authorized publication; it is the continuous build for version 2.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7Austria/HL7-AT-FHIR-Core-R5/ and changes regularly. See the Directory of published versions
| Active as of 2026-10-20 |
JSON representation of the at-core-ext-address-municipalityKey extension.
{
"resourceType" : "StructureDefinition",
"id" : "at-core-ext-address-municipalityKey",
"language" : "en",
"text" : {
"status" : "extensions",
"div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: StructureDefinition at-core-ext-address-municipalityKey</b></p><a name=\"at-core-ext-address-municipalityKey\"> </a><a name=\"hcat-core-ext-address-municipalityKey\"> </a><table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" class=\"xhtTableBorder0\"><tr class=\"xhtRowBorder1\"><th scope=\"col\" style=\"\" class=\"hierarchy xhtCellBorder0\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"The logical name of the element\">Name</a></th><th scope=\"col\" style=\"\" class=\"hierarchy xhtCellBorder0\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Information about the use of the element\">Flags</a></th><th scope=\"col\" style=\"\" class=\"hierarchy xhtCellBorder0\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Minimum and Maximum # of times the element can appear in the instance\">Card.</a></th><th scope=\"col\" style=\"; width: 100px\" class=\"hierarchy xhtCellBorder0\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Reference to the type of the element\">Type</a></th><th scope=\"col\" style=\"\" class=\"hierarchy xhtCellBorder0\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Additional information about the element\">Description & Constraints</a><span style=\"float: right\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64,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\" alt=\"doco\" style=\"background-color: inherit\"/></a></span></th></tr><tr class=\"xhtRowBorder0 xhtRowEven\"><td style=\"background-image: url(tbl_bck1.png)\" class=\"hierarchy xhtCellBorder0 xhtCellNoWrap\"><img src=\"tbl_spacer.png\" alt=\"\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\"\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-at-core-ext-address-municipalityKey-definitions.html#Extension\" title=\"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.\">Extension</a><a name=\"Extension\"> </a></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"/><td style=\"\" class=\"hierarchy xhtCellBorder0\"><span class=\"xhtPieceDeEmphasized\">0</span><span class=\"xhtPieceDeEmphasized\">..</span><span class=\"xhtPieceDeEmphasized\">*</span></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"><a href=\"http://hl7.org/fhir/R5/extensibility.html#Extension\">Extension</a></td><td style=\"\" class=\"hierarchy xhtCellBorder0\">Gemeindekennziffer (GKZ)</td></tr>\r\n<tr class=\"xhtRowBorder0 xhtRowOdd\"><td style=\"background-image: url(tbl_bck10.png)\" class=\"hierarchy xhtCellBorder0 xhtCellNoWrap\"><img src=\"tbl_spacer.png\" alt=\"\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\"\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_extension_simple.png\" alt=\"\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Simple Extension\" class=\"hierarchy\"/> <span style=\"position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0\" class=\"sr-only\">Extension.</span><a href=\"StructureDefinition-at-core-ext-address-municipalityKey-definitions.html#Extension.extension\" class=\"xhtPieceStrikeout\">extension</a><a name=\"Extension.extension\"> </a></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"/><td style=\"\" class=\"hierarchy xhtCellBorder0\"><span class=\"xhtPieceStrikeout\"/><span class=\"xhtPieceStrikeout xhtPieceDeEmphasized\">0</span><span class=\"xhtPieceStrikeout\">..</span><span class=\"xhtPieceStrikeout\">0</span></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"/><td style=\"\" class=\"hierarchy xhtCellBorder0\"><span class=\"xhtPieceItalic xhtPieceDeEmphasized\">Extension</span></td></tr>\r\n<tr class=\"xhtRowBorder0 xhtRowEven\"><td style=\"background-image: url(tbl_bck10.png)\" class=\"hierarchy xhtCellBorder0 xhtCellNoWrap\"><img src=\"tbl_spacer.png\" alt=\"\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\"\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\"\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <span style=\"position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0\" class=\"sr-only\">Extension.</span><a href=\"StructureDefinition-at-core-ext-address-municipalityKey-definitions.html#Extension.url\">url</a><a name=\"Extension.url\"> </a></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"/><td style=\"\" class=\"hierarchy xhtCellBorder0\"><span class=\"xhtPieceDeEmphasized\">1</span><span class=\"xhtPieceDeEmphasized\">..</span><span class=\"xhtPieceDeEmphasized\">1</span></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"><a href=\"http://hl7.org/fhir/R5/datatypes.html#uri\" class=\"xhtPieceDeEmphasized\">uri</a></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"><span class=\"xhtPieceDarkGreen\">"https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey"</span></td></tr>\r\n<tr class=\"xhtRowBorder0 xhtRowOdd\"><td style=\"background-image: url(tbl_bck00.png)\" class=\"hierarchy xhtCellBorder0 xhtCellNoWrap\"><img src=\"tbl_spacer.png\" alt=\"\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end.png\" alt=\"\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_primitive.png\" alt=\"\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Primitive Data Type\" class=\"hierarchy\"/> <span style=\"position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0\" class=\"sr-only\">Extension.</span><a href=\"StructureDefinition-at-core-ext-address-municipalityKey-definitions.html#Extension.value[x]\">value[x]</a><a name=\"Extension.value_x_\"> </a></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"/><td style=\"\" class=\"hierarchy xhtCellBorder0\">1..<span class=\"xhtPieceDeEmphasized\">1</span></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"><a href=\"http://hl7.org/fhir/R5/datatypes.html#string\">string</a></td><td style=\"\" class=\"hierarchy xhtCellBorder0\"><span class=\"xhtPieceDeEmphasized\">Value of extension</span></td></tr>\r\n<tr><td colspan=\"5\" class=\"hierarchy\"><br/><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64,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\" alt=\"doco\" style=\"background-color: inherit\"/> Documentation for this format</a></td></tr></table></div>"
},
"extension" : [
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics",
"valueCode" : "can-bind"
}
],
"url" : "https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey",
"version" : "2.1.0",
"name" : "AddressMunicipalityKey",
"title" : "Address GKZ (Gemeindekennziffer)",
"status" : "active",
"date" : "2026-10-20T08:51:36+00:00",
"publisher" : "HL7® Austria, TC FHIR®",
"contact" : [
{
"name" : "HL7® Austria, TC FHIR®",
"telecom" : [
{
"system" : "url",
"value" : "https://hl7.at/technische-komitees/tc-fhir/"
}
]
},
{
"name" : "Technical Committee for FHIR® at HL7® Austria",
"telecom" : [
{
"system" : "email",
"value" : "mailto:tc-fhir@hl7.at"
}
]
}
],
"description" : "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" : "5.0.0",
"mapping" : [
{
"identity" : "rim",
"uri" : "http://hl7.org/v3",
"name" : "RIM Mapping"
}
],
"kind" : "complex-type",
"abstract" : false,
"context" : [
{
"type" : "element",
"expression" : "Address"
},
{
"type" : "element",
"expression" : "https://fhir.hl7.at/core/r5/StructureDefinition/at-core-address#Address"
}
],
"type" : "Extension",
"baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
"derivation" : "constraint",
"snapshot" : {
"extension" : [
{
"url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
"valueString" : "5.0.0"
}
],
"element" : [
{
"id" : "Extension",
"path" : "Extension",
"short" : "Gemeindekennziffer (GKZ)",
"definition" : "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" : 0,
"max" : "*",
"base" : {
"path" : "Extension",
"min" : 0,
"max" : "*"
},
"constraint" : [
{
"key" : "ele-1",
"severity" : "error",
"human" : "All FHIR elements must have a @value or children",
"expression" : "hasValue() or (children().count() > id.count())",
"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()",
"source" : "http://hl7.org/fhir/StructureDefinition/Extension"
}
],
"isModifier" : false
},
{
"id" : "Extension.id",
"path" : "Extension.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" : "id"
}
],
"code" : "http://hl7.org/fhirpath/System.String"
}
],
"condition" : [
"ele-1"
],
"isModifier" : false,
"isSummary" : false,
"mapping" : [
{
"identity" : "rim",
"map" : "n/a"
}
]
},
{
"id" : "Extension.extension",
"path" : "Extension.extension",
"slicing" : {
"discriminator" : [
{
"type" : "value",
"path" : "url"
}
],
"description" : "Extensions are always sliced by (at least) url",
"rules" : "open"
},
"short" : "Extension",
"definition" : "An Extension",
"min" : 0,
"max" : "0",
"base" : {
"path" : "Element.extension",
"min" : 0,
"max" : "*"
},
"type" : [
{
"code" : "Extension"
}
],
"constraint" : [
{
"key" : "ele-1",
"severity" : "error",
"human" : "All FHIR elements must have a @value or children",
"expression" : "hasValue() or (children().count() > id.count())",
"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()",
"source" : "http://hl7.org/fhir/StructureDefinition/Extension"
}
],
"isModifier" : false,
"isSummary" : false
},
{
"id" : "Extension.url",
"path" : "Extension.url",
"representation" : [
"xmlAttr"
],
"short" : "identifies the meaning of the extension",
"definition" : "Source of the definition for the extension code - a logical name or a URL.",
"comment" : "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" : 1,
"max" : "1",
"base" : {
"path" : "Extension.url",
"min" : 1,
"max" : "1"
},
"type" : [
{
"extension" : [
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
"valueUrl" : "uri"
}
],
"code" : "http://hl7.org/fhirpath/System.String"
}
],
"fixedUri" : "https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey",
"isModifier" : false,
"isSummary" : false,
"mapping" : [
{
"identity" : "rim",
"map" : "N/A"
}
]
},
{
"id" : "Extension.value[x]",
"path" : "Extension.value[x]",
"short" : "Value of extension",
"definition" : "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" : 1,
"max" : "1",
"base" : {
"path" : "Extension.value[x]",
"min" : 0,
"max" : "1"
},
"type" : [
{
"code" : "string"
}
],
"condition" : [
"ext-1"
],
"constraint" : [
{
"key" : "ele-1",
"severity" : "error",
"human" : "All FHIR elements must have a @value or children",
"expression" : "hasValue() or (children().count() > id.count())",
"source" : "http://hl7.org/fhir/StructureDefinition/Element"
}
],
"isModifier" : false,
"isSummary" : false,
"mapping" : [
{
"identity" : "rim",
"map" : "N/A"
}
]
}
]
},
"differential" : {
"element" : [
{
"id" : "Extension",
"path" : "Extension",
"short" : "Gemeindekennziffer (GKZ)",
"definition" : "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."
},
{
"id" : "Extension.extension",
"path" : "Extension.extension",
"max" : "0"
},
{
"id" : "Extension.url",
"path" : "Extension.url",
"fixedUri" : "https://fhir.hl7.at/core/r5/StructureDefinition/at-core-ext-address-municipalityKey"
},
{
"id" : "Extension.value[x]",
"path" : "Extension.value[x]",
"min" : 1,
"type" : [
{
"code" : "string"
}
]
}
]
}
}