CH Core Quantity with EMED Units - CH Core (R4) v7.0.0-ballot

CH Core (R4)
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CH Core (R4), published by HL7 Switzerland. This guide is not an authorized publication; it is the continuous build for version 7.0.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7ch/ch-core/ and changes regularly. See the Directory of published versions

Data Type Profile: CH Core Quantity with EMED Units

Official URL: http://fhir.ch/ig/ch-core/StructureDefinition/ch-core-quantity-with-emed-units	Version: 7.0.0-ballot	Highlight text changes?
Active as of 2026-10-21		Computable Name: CHCoreQuantityWithEmedUnits
Copyright/Legal: CC0-1.0

A quantity with defined units

Usages:

Use this DataType Profile: CH Core Dosage, CH Core MedicationAdministration, CH Core Range with EMED Units and CH EMED Ratio with EMED Units

You can also check for usages in the FHIR IG Statistics

Formal Views of Profile Content

Description Differentials, Snapshots, and other representations.

Key Elements Table
Differential Table
Snapshot Table
Statistics/References
All

Name	Flags	Card.	Type	Description & Constraints Filter: Bindings Constraints Obligations
Quantity	C	0..*	SimpleQuantity	A fixed quantity (no comparator) Constraints: qty-3, sqty-1
Quantity.value	This element is included in summaries.	1..1	decimal	Numerical value (with implicit precision)
Quantity.unit	This element is included in summaries.	1..1	string	Unit representation
Quantity.system	This element is included in summaries. C	1..1	uri	System that defines coded unit form
Quantity.code	This element is included in summaries.	1..1	code	Coded form of the unit Binding: UnitCode (preferred)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Quantity.code	Base	preferred	UnitCode	📦3.4.0	CH Term v3.4

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())`
qty-3	error	Quantity	If a code for the unit is present, the system SHALL also be present	`code.empty() or system.exists()`
sqty-1	error	Quantity	The comparator is not used on a SimpleQuantity	`comparator.empty()`

This structure is derived from SimpleQuantity

Name	Card.	Type	Description & Constraints Filter: Bindings Constraints Obligations
Quantity		SimpleQuantity
Quantity.value	1..1	decimal	Numerical value (with implicit precision)
Quantity.unit	1..1	string	Unit representation
Quantity.system	1..1	uri	System that defines coded unit form
Quantity.code	1..1	code	Coded form of the unit Binding: UnitCode (preferred)
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
Quantity.code	Base	preferred	UnitCode	📦3.4.0	CH Term v3.4

Name	Flags	Card.	Type	Description & Constraints Filter: Bindings Constraints Obligations
Quantity	C	0..*	SimpleQuantity	A fixed quantity (no comparator) Constraints: qty-3, sqty-1
Quantity.id		0..1	string	Unique id for inter-element referencing
Quantity.extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
Quantity.value	This element is included in summaries.	1..1	decimal	Numerical value (with implicit precision)
Quantity.unit	This element is included in summaries.	1..1	string	Unit representation
Quantity.system	This element is included in summaries. C	1..1	uri	System that defines coded unit form
Quantity.code	This element is included in summaries.	1..1	code	Coded form of the unit Binding: UnitCode (preferred)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Quantity.code	Base	preferred	UnitCode	📦3.4.0	CH Term v3.4

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()`
sqty-1	error	Quantity	The comparator is not used on a SimpleQuantity	`comparator.empty()`

This structure is derived from SimpleQuantity

Summary

Mandatory: 4 elements

Key Elements View

Name	Flags	Card.	Type	Description & Constraints Filter: Bindings Constraints Obligations
Quantity	C	0..*	SimpleQuantity	A fixed quantity (no comparator) Constraints: qty-3, sqty-1
Quantity.value	This element is included in summaries.	1..1	decimal	Numerical value (with implicit precision)
Quantity.unit	This element is included in summaries.	1..1	string	Unit representation
Quantity.system	This element is included in summaries. C	1..1	uri	System that defines coded unit form
Quantity.code	This element is included in summaries.	1..1	code	Coded form of the unit Binding: UnitCode (preferred)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Quantity.code	Base	preferred	UnitCode	📦3.4.0	CH Term v3.4

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())`
qty-3	error	Quantity	If a code for the unit is present, the system SHALL also be present	`code.empty() or system.exists()`
sqty-1	error	Quantity	The comparator is not used on a SimpleQuantity	`comparator.empty()`

Differential View

This structure is derived from SimpleQuantity

Name	Card.	Type	Description & Constraints Filter: Bindings Constraints Obligations
Quantity		SimpleQuantity
Quantity.value	1..1	decimal	Numerical value (with implicit precision)
Quantity.unit	1..1	string	Unit representation
Quantity.system	1..1	uri	System that defines coded unit form
Quantity.code	1..1	code	Coded form of the unit Binding: UnitCode (preferred)
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
Quantity.code	Base	preferred	UnitCode	📦3.4.0	CH Term v3.4

Snapshot ViewView

Name	Flags	Card.	Type	Description & Constraints Filter: Bindings Constraints Obligations
Quantity	C	0..*	SimpleQuantity	A fixed quantity (no comparator) Constraints: qty-3, sqty-1
Quantity.id		0..1	string	Unique id for inter-element referencing
Quantity.extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
Quantity.value	This element is included in summaries.	1..1	decimal	Numerical value (with implicit precision)
Quantity.unit	This element is included in summaries.	1..1	string	Unit representation
Quantity.system	This element is included in summaries. C	1..1	uri	System that defines coded unit form
Quantity.code	This element is included in summaries.	1..1	code	Coded form of the unit Binding: UnitCode (preferred)
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Quantity.code	Base	preferred	UnitCode	📦3.4.0	CH Term v3.4

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()`
sqty-1	error	Quantity	The comparator is not used on a SimpleQuantity	`comparator.empty()`

This structure is derived from SimpleQuantity

Summary

Mandatory: 4 elements

Other representations of profile: CSV, Excel, Schematron

IG © 2020+ HL7 Switzerland. Package ch.fhir.ig.ch-core#7.0.0-ballot based on FHIR 4.0.1. Generated 2026-10-21
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