﻿ Extension: uncertainty - FHIR v4.1.0
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# 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

## Extension Content

Summary

NameFlagsCard.TypeDescription & Constraints
uncertainty0..1decimalURL = 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

NameFlagsCard.TypeDescription & Constraints
extension0..1ExtensionURL = 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 0..0
url 1..1url"http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"
value[x] 0..1(Slice Definition)Value of extension
Slice: Unordered, Closed by type:\$this
value[x]:valueDecimal 0..1decimalValue 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 sliced by type:\$this  in the specified orderClosed-->
<valueDecimal value="[decimal]"/><!-- 0..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" : [ //  sliced by type:\$this  in the specified order, Closed
{ // Value of extension //
// from Element: extension
}
],
}
```

Summary

NameFlagsCard.TypeDescription & Constraints
uncertainty0..1decimalURL = 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

NameFlagsCard.TypeDescription & Constraints
extension0..1ExtensionURL = 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 0..0
url 1..1url"http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"
value[x] 0..1(Slice Definition)Value of extension
Slice: Unordered, Closed by type:\$this
value[x]:valueDecimal 0..1decimalValue 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 sliced by type:\$this  in the specified orderClosed-->
<valueDecimal value="[decimal]"/><!-- 0..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" : [ //  sliced by type:\$this  in the specified order, Closed
{ // Value of extension //
// from Element: 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')]))