Release 4B 5 Ballot

This page is part of the FHIR Specification (v4.3.0: R4B (v5.0.0-ballot: R5 Ballot - STU see ballot notes ). The current version which supercedes this version is 5.0.0 . For a full list of available versions, see the Directory of published versions . Page versions: R4B R4 R3 R2

Extension: nullFlavor

FHIR Infrastructure Work Group   Maturity Level : 1 Informative Use Context : Any

URL for this extension: http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor Summary

Defining URL: http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor
Version: 5.0.0-ballot
Name: nullFlavor
Title: null
Modifier: This extension is not a modifier extension
Status: draft
Definition: If the value is not a proper value, indicates the reason.
Committee: FHIR Infrastructure Work Group

Status: draft. Extension maintained by: Health Level Seven International (Modeling and Methodology)

If the value is not a proper value, indicates the reason.

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.

Context of Use: Use on Element ID Element

Extension Content

Summary

Name Flags Card. Type Description & Constraints doco
. . nullFlavor 0..1 code URL = http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor
nullFlavor: If the value is not a proper value, indicates the reason.


Binding: NullFlavor ( required )
Use on Element ID Element

doco Documentation for this format

Full Structure

Name Flags Card. Type Description & Constraints doco
. . extension 0..1 Extension URL = http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor
nullFlavor: If the value is not a proper value, indicates the reason.


Use on Element ID Element
. . . extension 0..0
. . . url 1..1 uri "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor"
. . . value[x] 1..1 code Value of extension
Binding: NullFlavor ( required )

doco Documentation for this format

XML Template 

<!-- nullFlavor -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor" >
  <!-- from Element: extension -->
 <

 <valueCode value="[code]"/><!-- I 1..1 Value of extension -->

</extension>

JSON Template 

{ // nullFlavor
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor", // R! 
    "

    "valueCode" : "<code>" // I R! Value of extension

  }

Summary

Name Flags Card. Type Description & Constraints doco
. . nullFlavor 0..1 code URL = http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor
nullFlavor: If the value is not a proper value, indicates the reason.


Binding: NullFlavor ( required )
Use on Element ID Element

doco Documentation for this format

Full Structure

Name Flags Card. Type Description & Constraints doco
. . extension 0..1 Extension URL = http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor
nullFlavor: If the value is not a proper value, indicates the reason.


Use on Element ID Element
. . . extension 0..0
. . . url 1..1 uri "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor"
. . . value[x] 1..1 code Value of extension
Binding: NullFlavor ( required )

doco Documentation for this format

XML Template 

<!-- nullFlavor -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor" >
  <!-- from Element: extension -->
 <

 <valueCode value="[code]"/><!-- I 1..1 Value of extension -->

</extension>

JSON Template 

{ // nullFlavor
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/iso21090-nullFlavor", // R! 
    "

    "valueCode" : "<code>" // I R! Value of extension

  }

 

Constraints

  • ele-1 : All FHIR elements must have a @value or children unless an empty Parameters resource (xpath: @value|f:*|h:div|self::f:Parameters @value|f:*|h:div )
  • ext-1 : Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')]) )
  • ele-1 : On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div )
  • ext-1 : On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]) )
  • ele-1 : On Extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.value[x]: @value|f:*|h:div )

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