description: 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).
package_name: rs/hl7.fhir.core
derivation: constraint
name: Standard Deviation (same units as the quantity)
type: null
elements:
  extension: {name: extension, index: 0}
  url:
    type: uri
    pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty'}
    index: 1
  value:
    choices: [valueDecimal]
    index: 3
  valueDecimal: {type: decimal, choiceOf: value, index: 4}
package_version: 1.4.0
extensions: {}
class: datatype
kind: datatype
url: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null
required: [value, valueDecimal]