{
"description": "If the value is not a proper value, indicates the reason.",
"_filename": "StructureDefinition-iso21090-nullFlavor.json",
"package_name": "hl7.fhir.r5.examples",
"date": "2012-06-24",
"derivation": "constraint",
"publisher": "Health Level Seven International (Modeling and Methodology)",
"fhirVersion": "4.2.0",
"name": "nullFlavor",
"mapping": [ {
"uri": "http://hl7.org/v2",
"name": "HL7 v2 Mapping",
"identity": "v2"
}, {
"uri": "http://hl7.org/v3",
"name": "RIM Mapping",
"identity": "rim"
} ],
"abstract": false,
"type": "Extension",
"experimental": null,
"resourceType": "StructureDefinition",
"title": null,
"package_version": "4.2.0",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
"valueCode": "fhir"
}, {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
"valueInteger": 1
} ],
"snapshot": {
"element": [ {
"constraint": [ {
"key": "ele-1",
"human": "All FHIR elements must have a @value or children",
"xpath": "@value|f:*|h:div",
"source": "Element",
"severity": "error",
"expression": "hasValue() or (children().count() > id.count())"
}, {
"key": "ext-1",
"human": "Must have either extensions or value[x], not both",
"xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
"source": "http://hl7.org/fhir/StructureDefinition/Extension",
"severity": "error",
"expression": "extension.exists() != value.exists()"
} ],
"path": "Extension",
"min": 0,
"definition": "If the value is not a proper value, indicates the reason.",
"isModifier": false,
"short": "NI | OTH | NINF | PINF | UNK | ASKU | NAV | NASK | TRC | MSK | NA | QS",
"mapping": [ {
"map": "n/a",
"identity": "v2"
}, {
"map": "ANY.nullFlavor",
"identity": "rim"
} ],
"max": "1",
"id": "Extension",
"comment": "Considerable care must be used when using nullFlavor in this context of FHIR - more than any other concept, this is tied to the way v3 works, and FHIR is quite different. For instance, there is no notion of a \"proper value\" as opposed to any other value in FHIR. a NullFlavor should be understood to mean, \"why information is missing\", and the nulFlavors OTH, NINF, PINF, and TRC should not be used.",
"base": {
"max": "*",
"min": 0,
"path": "Extension"
}
}, {
"path": "Extension.id",
"min": 0,
"definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
"isModifier": false,
"short": "Unique id for inter-element referencing",
"mapping": [ {
"map": "n/a",
"identity": "rim"
} ],
"type": [ {
"code": "http://hl7.org/fhirpath/System.String",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
"valueUri": "string"
} ]
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.id",
"base": {
"max": "1",
"min": 0,
"path": "Element.id"
},
"isSummary": false
}, {
"constraint": [ {
"key": "ele-1",
"human": "All FHIR elements must have a @value or children",
"xpath": "@value|f:*|h:div",
"source": "Element",
"severity": "error",
"expression": "hasValue() or (children().count() > id.count())"
}, {
"key": "ext-1",
"human": "Must have either extensions or value[x], not both",
"xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
"source": "Extension",
"severity": "error",
"expression": "extension.exists() != value.exists()"
} ],
"path": "Extension.extension",
"min": 0,
"definition": "An Extension",
"isModifier": false,
"short": "Extension",
"slicing": {
"rules": "open",
"description": "Extensions are always sliced by (at least) url",
"discriminator": [ {
"path": "url",
"type": "value"
} ]
},
"type": [ {
"code": "Extension"
} ],
"max": "0",
"id": "Extension.extension",
"base": {
"max": "*",
"min": 0,
"path": "Element.extension"
},
"isSummary": false
}, {
"path": "Extension.url",
"min": 1,
"definition": "Source of the definition for the extension code - a logical name or a URL.",
"isModifier": false,
"short": "identifies the meaning of the extension",
"fixedUri": "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "http://hl7.org/fhirpath/System.String",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
"valueUri": "uri"
} ]
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.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.",
"base": {
"max": "1",
"min": 1,
"path": "Extension.url"
},
"isSummary": false
}, {
"constraint": [ {
"key": "ele-1",
"human": "All FHIR elements must have a @value or children",
"xpath": "@value|f:*|h:div",
"source": "Element",
"severity": "error",
"expression": "hasValue() or (children().count() > id.count())"
} ],
"path": "Extension.value[x]",
"min": 1,
"definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](extensibility.html) for a list).",
"isModifier": false,
"short": "Value of extension",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "code"
} ],
"binding": {
"strength": "required",
"valueSet": "http://terminology.hl7.org/ValueSet/v3-NullFlavor|4.2.0",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
"valueString": "NullFlavor"
} ],
"description": "A collection of codes specifying why a valid value is not present."
},
"max": "1",
"id": "Extension.value[x]",
"base": {
"max": "1",
"min": 0,
"path": "Extension.value[x]"
},
"isSummary": false
} ]
},
"status": "draft",
"id": "1bf5bce1-10ad-408b-b8fa-0d79f3eb265b",
"kind": "complex-type",
"url": "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor",
"context": [ {
"type": "element",
"expression": "Element"
} ],
"version": "4.2.0",
"differential": {
"element": [ {
"id": "Extension",
"max": "1",
"min": 0,
"path": "Extension",
"short": "NI | OTH | NINF | PINF | UNK | ASKU | NAV | NASK | TRC | MSK | NA | QS",
"comment": "Considerable care must be used when using nullFlavor in this context of FHIR - more than any other concept, this is tied to the way v3 works, and FHIR is quite different. For instance, there is no notion of a \"proper value\" as opposed to any other value in FHIR. a NullFlavor should be understood to mean, \"why information is missing\", and the nulFlavors OTH, NINF, PINF, and TRC should not be used.",
"mapping": [ {
"map": "n/a",
"identity": "v2"
}, {
"map": "ANY.nullFlavor",
"identity": "rim"
} ],
"definition": "If the value is not a proper value, indicates the reason."
}, {
"id": "Extension.extension",
"max": "0",
"path": "Extension.extension"
}, {
"id": "Extension.url",
"path": "Extension.url",
"fixedUri": "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor"
}, {
"id": "Extension.value[x]",
"min": 1,
"path": "Extension.value[x]",
"type": [ {
"code": "code"
} ],
"binding": {
"strength": "required",
"valueSet": "http://terminology.hl7.org/ValueSet/v3-NullFlavor|4.2.0",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
"valueString": "NullFlavor"
} ],
"description": "A collection of codes specifying why a valid value is not present."
}
} ]
},
"contact": [ {
"telecom": [ {
"value": "http://www.hl7.org/Special/committees/mnm",
"system": "url"
} ]
} ],
"baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}