Release 5 Preview #2

This page is part of the FHIR Specification (v4.4.0: R5 Preview #2). 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

Extension: certainty

Patient Care Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty

Status: draft. Extension maintained by: Health Level Seven, Inc. - FHIR WG

Statement about the degree of clinical certainty that the specific substance was the cause of the manifestation in this reaction event.

Comment:

When certainty is missing, it means no information exists (although it could be in narrative). By contrast, the unknown code is used when there is an explicit assertion that certainty is not known, such as when a patient eats a meal and it is unknown which food caused the reaction.

Context of Use: Use on Element ID AllergyIntolerance.reaction

Summary

Name	Flags	Card.	Type	Description & Constraints
certainty		0..1	CodeableConcept	URL = http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty certainty: Statement about the degree of clinical certainty that the specific substance was the cause of the manifestation in this reaction event. Binding: AllergyIntoleranceCertainty (extensible) Use on Element ID AllergyIntolerance.reaction
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty certainty: Statement about the degree of clinical certainty that the specific substance was the cause of the manifestation in this reaction event. Use on Element ID AllergyIntolerance.reaction
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty"
value[x]	I	1..1	CodeableConcept	Value of extension Binding: AllergyIntoleranceCertainty (extensible)
Documentation for this format

XML Template

<!-- certainty -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty" >
  <!-- from Element: extension -->
 <valueCodeableConcept><!--  1..1 CodeableConcept Value of extension --></valueCodeableConcept>
</extension>

JSON Template

{ // certainty
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty", // R! 
    "valueCodeableConcept" : { CodeableConcept } // C? R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
certainty		0..1	CodeableConcept	URL = http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty certainty: Statement about the degree of clinical certainty that the specific substance was the cause of the manifestation in this reaction event. Binding: AllergyIntoleranceCertainty (extensible) Use on Element ID AllergyIntolerance.reaction
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty certainty: Statement about the degree of clinical certainty that the specific substance was the cause of the manifestation in this reaction event. Use on Element ID AllergyIntolerance.reaction
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty"
value[x]	I	1..1	CodeableConcept	Value of extension Binding: AllergyIntoleranceCertainty (extensible)
Documentation for this format

XML Template

<!-- certainty -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty" >
  <!-- from Element: extension -->
 <valueCodeableConcept><!--  1..1 CodeableConcept Value of extension --></valueCodeableConcept>
</extension>

JSON Template

{ // certainty
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty", // R! 
    "valueCodeableConcept" : { CodeableConcept } // C? R! Value of extension
  }

Constraints

ele-1: All FHIR elements must have a @value or children (xpath: @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)