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 R2

Extension: uncertainty

FHIR Infrastructure Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty

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

The primary measure of variance/uncertainty of the value (the square root of the sum of the squares of the differences between all data points and the mean).

Comment:

standardDeviation has the same units as the quantity. It is used to normalize the data for computing the distribution function. Applications that cannot deal with probability distributions can still get an idea about the confidence level by looking at standardDeviation.

Context of Use: Use on Element ID Quantity

Summary

Name	Flags	Card.	Type	Description & Constraints
uncertainty		0..1	decimal	URL = http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty uncertainty: The primary measure of variance/uncertainty of the value (the square root of the sum of the squares of the differences between all data points and the mean). Use on Element ID Quantity
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty uncertainty: The primary measure of variance/uncertainty of the value (the square root of the sum of the squares of the differences between all data points and the mean). Use on Element ID Quantity
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"
value[x]	I	1..1	decimal	Value of extension
Documentation for this format

XML Template

<!-- uncertainty -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty" >
  <!-- from Element: extension -->
 <valueDecimal value="[decimal]"/><!--  1..1 Value of extension -->
</extension>

JSON Template

{ // uncertainty
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty", // R! 
    "valueDecimal" : <decimal> // C? R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
uncertainty		0..1	decimal	URL = http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty uncertainty: The primary measure of variance/uncertainty of the value (the square root of the sum of the squares of the differences between all data points and the mean). Use on Element ID Quantity
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty uncertainty: The primary measure of variance/uncertainty of the value (the square root of the sum of the squares of the differences between all data points and the mean). Use on Element ID Quantity
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"
value[x]	I	1..1	decimal	Value of extension
Documentation for this format

XML Template

<!-- uncertainty -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty" >
  <!-- from Element: extension -->
 <valueDecimal value="[decimal]"/><!--  1..1 Value of extension -->
</extension>

JSON Template

{ // uncertainty
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty", // R! 
    "valueDecimal" : <decimal> // 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)