HL7 Europe Laboratory Report
2.0.0 - ci-build 150

HL7 Europe Laboratory Report, published by HL7 Europe. This guide is not an authorized publication; it is the continuous build for version 2.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-eu/laboratory/ and changes regularly. See the Directory of published versions

Data Type Profile: Quantity (Eu Lab)

Official URL: http://hl7.eu/fhir/laboratory/StructureDefinition/Quantity-eu-lab Version: 2.0.0
Active as of 2026-05-05 Computable Name: QuantityEuLab

Copyright/Legal: Copyright HL7 Europe. Licensed under creative commons public domain (CC0 1.0).

This profile constrains the Quantity data type to use UCUM for units. When using the Quantity datatype, the unit is represented using a coded form with UCUM as the system in the code element. The human-readable textual representation is is captured in the unit element. If no suitable UCUM code exists, the code is set to “1”, and the textual unit representation is used. If both coded and textual representations are present, they need to be semantically consistent.

This profile of the Quantity data type imposes the usage of the UCUM as the code system for units and allows expressing uncertainty of measurement

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Profile Content

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

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Quantity C 0..* Quantity A measured amount using UCUM
Constraints: qty-3
... Slices for extension Content/Rules for all slices
.... extension:uncertainty 0..1 decimal Standard Deviation (same units as the quantity)
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty
.... extension:uncertaintyType 0..1 code Probability Distribution Type for uncertainty
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType
Binding: ProbabilityDistributionType (required)
... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Quantity.comparator Base required QuantityComparator 📍4.0.1 FHIR Std.

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
qty-3 error Quantity If a code for the unit is present, the system SHALL also be present code.empty() or system.exists()

This structure is derived from Quantity

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Quantity 0..* Quantity A measured amount using UCUM
... Slices for extension Content/Rules for all slices
.... extension:uncertainty 0..1 decimal Standard Deviation (same units as the quantity)
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty
.... extension:uncertaintyType 0..1 code Probability Distribution Type for uncertainty
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType
Binding: ProbabilityDistributionType (required)
... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Quantity C 0..* Quantity A measured amount using UCUM
Constraints: qty-3
... id 0..1 string Unique id for inter-element referencing
... Slices for extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... extension:uncertainty 0..1 decimal Standard Deviation (same units as the quantity)
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty
.... extension:uncertaintyType 0..1 code Probability Distribution Type for uncertainty
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType
Binding: ProbabilityDistributionType (required)
... value Σ 0..1 decimal Numerical value (with implicit precision)
... unit Σ 0..1 string Unit representation
... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
... code Σ 0..1 code Coded form of the unit

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Quantity.comparator Base required QuantityComparator 📍4.0.1 FHIR Std.

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
qty-3 error Quantity If a code for the unit is present, the system SHALL also be present code.empty() or system.exists()

Key Elements View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Quantity C 0..* Quantity A measured amount using UCUM
Constraints: qty-3
... Slices for extension Content/Rules for all slices
.... extension:uncertainty 0..1 decimal Standard Deviation (same units as the quantity)
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty
.... extension:uncertaintyType 0..1 code Probability Distribution Type for uncertainty
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType
Binding: ProbabilityDistributionType (required)
... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Quantity.comparator Base required QuantityComparator 📍4.0.1 FHIR Std.

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
qty-3 error Quantity If a code for the unit is present, the system SHALL also be present code.empty() or system.exists()

Differential View

This structure is derived from Quantity

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Quantity 0..* Quantity A measured amount using UCUM
... Slices for extension Content/Rules for all slices
.... extension:uncertainty 0..1 decimal Standard Deviation (same units as the quantity)
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty
.... extension:uncertaintyType 0..1 code Probability Distribution Type for uncertainty
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType
Binding: ProbabilityDistributionType (required)
... system 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Quantity C 0..* Quantity A measured amount using UCUM
Constraints: qty-3
... id 0..1 string Unique id for inter-element referencing
... Slices for extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... extension:uncertainty 0..1 decimal Standard Deviation (same units as the quantity)
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty
.... extension:uncertaintyType 0..1 code Probability Distribution Type for uncertainty
URL: http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType
Binding: ProbabilityDistributionType (required)
... value Σ 0..1 decimal Numerical value (with implicit precision)
... unit Σ 0..1 string Unit representation
... system ΣC 0..1 uri System that defines coded unit form
Required Pattern: http://unitsofmeasure.org
... code Σ 0..1 code Coded form of the unit

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Quantity.comparator Base required QuantityComparator 📍4.0.1 FHIR Std.

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()
qty-3 error Quantity If a code for the unit is present, the system SHALL also be present code.empty() or system.exists()

 

Other representations of profile: CSV, Excel, Schematron