Slot: Uncertainty Units (UCUM) (per_value_uncertainty_units_ucum)

Units of the per-value uncertainty in UCUM syntax. Usually the same as the value units.

Tier: recommended

Why this slot matters

An uncertainty number is meaningless without its units: a per-value error of "2" is 2 °C or 2 K depending on this field, and a mismatch between value units and uncertainty units silently corrupts any error propagation into the health analysis.

In plain terms

This says what the uncertainty is measured in — degrees Celsius, micrograms per cubic metre, and so on — written in a standard code (UCUM) that computers read the same way every time. Usually it matches the units of the value itself.

URI: envar:slot/per_value_uncertainty_units_ucum

Applicable Classes

Name	Description	Modifies Slot
Uncertainty	Uncertainty and quality character of a value series: per-value uncertainty ty...	no

Properties

Type and Range

Property	Value
Range	String
Domain Of	Uncertainty

Cardinality and Requirements

Property	Value

Examples

Value
Cel

Identifier and Mapping Information

Annotations

property	value
tier	recommended
justification	An uncertainty number is meaningless without its units: a per-value error of "2" is 2 °C or 2 K depending on this field, and a mismatch between value units and uncertainty units silently corrupts any error propagation into the health analysis.
explanation	This says what the uncertainty is measured in — degrees Celsius, micrograms per cubic metre, and so on — written in a standard code (UCUM) that computers read the same way every time. Usually it matches the units of the value itself.
covered_by	None

Schema Source

from schema: https://w3id.org/linkml/microschemas/envar

Mappings

Mapping Type	Mapped Value
self	envar:per_value_uncertainty_units_ucum
native	envar:per_value_uncertainty_units_ucum

LinkML Source

name: per_value_uncertainty_units_ucum
annotations:
  tier:
    tag: tier
    value: recommended
  justification:
    tag: justification
    value: 'An uncertainty number is meaningless without its units: a per-value error
      of "2" is 2 °C or 2 K depending on this field, and a mismatch between value
      units and uncertainty units silently corrupts any error propagation into the
      health analysis.'
  explanation:
    tag: explanation
    value: This says what the uncertainty is measured in — degrees Celsius, micrograms
      per cubic metre, and so on — written in a standard code (UCUM) that computers
      read the same way every time. Usually it matches the units of the value itself.
  covered_by:
    tag: covered_by
    annotations:
      omop_gaia:
        tag: omop_gaia
        annotations:
          extent:
            tag: extent
            value: absent
          status:
            tag: status
            value: asserted
          where:
            tag: where
            value: no column
          note:
            tag: note
            value: With no per-value uncertainty column, gaia carries no uncertainty
              units.
      degauss:
        tag: degauss
        annotations:
          extent:
            tag: extent
            value: absent
          status:
            tag: status
            value: asserted
          where:
            tag: where
            value: no column
          note:
            tag: note
            value: No per-value uncertainty column exists, so no uncertainty units.
      amadeus:
        tag: amadeus
        annotations:
          extent:
            tag: extent
            value: absent
          status:
            tag: status
            value: asserted
          where:
            tag: where
            value: no column
          note:
            tag: note
            value: No per-value uncertainty column exists, so no uncertainty units.
      cher:
        tag: cher
        annotations:
          extent:
            tag: extent
            value: absent
          status:
            tag: status
            value: asserted
          where:
            tag: where
            value: no column
          note:
            tag: note
            value: No per-value uncertainty field, so no uncertainty units in C-HER.
      codata:
        tag: codata
        annotations:
          extent:
            tag: extent
            value: out_of_layer
          status:
            tag: status
            value: asserted
          where:
            tag: where
            value: no column
          note:
            tag: note
            value: Per-value uncertainty units are instance-layer; out of scope for
              CODATA.
description: Units of the per-value uncertainty in UCUM syntax. Usually the same as
  the value units.
title: Uncertainty Units (UCUM)
examples:
- value: Cel
  description: Standard error of a daily Tmax value, in degrees Celsius.
from_schema: https://w3id.org/linkml/microschemas/envar
see_also:
- https://ucum.org/
rank: 1000
domain_of:
- Uncertainty
range: string