This page is part of the Using CQL with FHIR Implementation Guide (v3.0.0-ballot: STU 3 Ballot) based on FHIR (HL7® FHIR® Standard) R4. This version is a pre-release. The current official version is 2.0.0. For a full list of available versions, see the Directory of published versions

• Content
• Detailed Descriptions
• Mappings
• XML
• JSON

Extension: CQL Namespace

The CQL namespace of the CQL library. For Library resources packaged in FHIR NPM Packages, this SHALL be the packageId of the package.

Context of Use

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

• Element ID: Library

Usage info

Usages:

• Use this Extension: CQL Library
• Examples for this Extension: FHIRCommon

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

• Differential Table
• Snapshot Table
• Statistics/References
• All

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Namespace name
url		1..1	uri	"http://hl7.org/fhir/uv/cql/StructureDefinition/cql-namespace"
value[x]		1..1	string	Value of extension
Documentation for this format

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Namespace name
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
url		1..1	uri	"http://hl7.org/fhir/uv/cql/StructureDefinition/cql-namespace"
value[x]		1..1	string	Value of extension
Documentation for this format

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()

Summary

Simple Extension with the type string: The CQL namespace of the CQL library. For Library resources packaged in FHIR NPM Packages, this SHALL be the packageId of the package.

Maturity: 1

Differential ViewDifferential View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Namespace name
url		1..1	uri	"http://hl7.org/fhir/uv/cql/StructureDefinition/cql-namespace"
value[x]		1..1	string	Value of extension
Documentation for this format

Snapshot View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Extension		0..1	Extension	Namespace name
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
url		1..1	uri	"http://hl7.org/fhir/uv/cql/StructureDefinition/cql-namespace"
value[x]		1..1	string	Value of extension
Documentation for this format

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()

Summary

Simple Extension with the type string: The CQL namespace of the CQL library. For Library resources packaged in FHIR NPM Packages, this SHALL be the packageId of the package.

Maturity: 1

Other representations of profile: CSV, Excel, Schematron