{
  "description": "If the value is not a proper value, indicates the reason.",
  "_filename": "extension-iso21090-nullflavor.json",
  "package_name": "rs/hl7.fhir.core",
  "date": "2012-06-24",
  "derivation": "constraint",
  "publisher": "Health Level Seven International (Modeling and Methodology)",
  "fhirVersion": "1.8.0",
  "name": "NI | OTH | NINF | PINF | UNK | ASKU | NAV | NASK | TRC | MSK | NA | QS",
  "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": "1.8.0",
  "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": "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",
      "min": 0,
      "definition": "If the value is not a proper value, indicates the reason.",
      "short": "NI | OTH | NINF | PINF | UNK | ASKU | NAV | NASK | TRC | MSK | NA | QS",
      "comments": "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"
      } ],
      "max": "1",
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs",
      "condition": [ "ele-1" ],
      "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.",
      "short": "xml:id (or equivalent in JSON)",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "string"
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      }
    }, {
      "path": "Extension.extension",
      "min": 0,
      "definition": "An Extension",
      "short": "Extension",
      "type": [ {
        "code": "Extension"
      } ],
      "sliceName": "extension",
      "max": "0",
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs.extension:extension",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      }
    }, {
      "path": "Extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor",
      "comments": "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.",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "uri"
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs.url",
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      }
    }, {
      "path": "Extension.valueCode",
      "min": 1,
      "definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
      "short": "Value of extension",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "code"
      } ],
      "binding": {
        "strength": "required",
        "description": "A collection of codes specifying why a valid value is not present",
        "valueSetReference": {
          "reference": "http://hl7.org/fhir/ValueSet/v3-NullFlavor"
        }
      },
      "max": "1",
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs.valueCode",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      }
    } ]
  },
  "status": "draft",
  "id": "73508614-b53e-44be-bf68-cf3120e02746",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor",
  "context": [ "Any" ],
  "version": null,
  "differential": {
    "element": [ {
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs",
      "max": "1",
      "min": 0,
      "path": "Extension",
      "short": "NI | OTH | NINF | PINF | UNK | ASKU | NAV | NASK | TRC | MSK | NA | QS",
      "mapping": [ {
        "map": "n/a",
        "identity": "v2"
      }, {
        "map": "ANY.nullFlavor",
        "identity": "rim"
      } ],
      "comments": "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.",
      "definition": "If the value is not a proper value, indicates the reason."
    }, {
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs.extension:extension",
      "max": "0",
      "path": "Extension.extension",
      "sliceName": "extension"
    }, {
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs.url",
      "path": "Extension.url",
      "type": [ {
        "code": "uri"
      } ],
      "fixedUri": "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor"
    }, {
      "id": "Extension:ni|oth|ninf|pinf|unk|asku|nav|nask|trc|msk|na|qs.value[x]",
      "min": 1,
      "path": "Extension.value[x]",
      "type": [ {
        "code": "code"
      } ],
      "binding": {
        "strength": "required",
        "description": "A collection of codes specifying why a valid value is not present",
        "valueSetReference": {
          "reference": "http://hl7.org/fhir/ValueSet/v3-NullFlavor"
        }
      }
    } ]
  },
  "contact": [ {
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/mnm",
      "system": "url"
    } ]
  } ],
  "contextType": "datatype",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}