FHIR Extensions Pack
5.3.0-ballot-tc1 - (September 2025 Ballot) International flag

FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.3.0-ballot-tc1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions

Extension: Uncertainty

Official URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty Version: 5.3.0-ballot-tc1
Standards status: Trial-use Maturity Level: 3 Computable Name: Uncertainty
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1665

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).

Context of Use

This extension may be used on the following element(s)

Usage info

Usages:

  • This Extension is not used by any profiles in this Implementation Guide

You can also check for usages in the FHIR IG Statistics

Changes since version 5.2.0:

  • No changes

    • Formal Views of Extension Content

    Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

    This structure is derived from Extension

    Summary

    Simple Extension with the type decimal: 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).

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Standard Deviation (same units as the quantity)
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"
    ... value[x] 1..1 decimal Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Standard Deviation (same units as the quantity)
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type decimal: 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).

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Standard Deviation (same units as the quantity)
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"
    ... value[x] 1..1 decimal Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Standard Deviation (same units as the quantity)
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty"

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Constraints

    IdGradePath(s)DetailsRequirements
    ele-1error**ALL** elementsAll FHIR elements must have a @value or children
    : hasValue() or (children().count() > id.count())
    ext-1error**ALL** extensionsMust have either extensions or value[x], not both
    : extension.exists() != value.exists()

    R4B

    The extension is not used in R4B

    • Duplicate Resource http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty of type StructureDefinition (existing version 4.3.0, new version 5.3.0-ballot-tc1)

    R4

    The extension is not used in R4

    • Duplicate Resource http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty of type StructureDefinition (existing version 4.0.1, new version 5.3.0-ballot-tc1)

    R3

    The extension is not used in R3

    • Duplicate Resource http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty of type StructureDefinition (existing version null, new version 5.3.0-ballot-tc1)

    Search Parameters for this Extension

    (none found)