FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.2.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions
Official URL: http://hl7.org/fhir/StructureDefinition/valueset-expression | Version: 5.2.0-ballot | |||
Standards status: Trial-use | Maturity Level: 3 | Responsible: HL7 International / Terminology Infrastructure | Computable Name: VSExpression | |
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1211 |
An expression that provides an alternative definition of the content of the value set (compose). There are two different ways to use this expression extension: If both an expression (this extension) and a compose element is present, the compose is understood to make the same statement as the expression. If there is no compose, the expression is the only definition of the value set and the ValueSet definition (compose) can only be evaluated by a system that understands the syntax used in the expression.
Context of Use
This extension may be used on the following element(s)
ValueSet
Usage info
Usages:
Changes since version 1.0.0:
Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.
This structure is derived from Extension
Summary
Simple Extension with the type Expression: An expression that provides an alternative definition of the content of the value set (compose). There are two different ways to use this expression extension: If both an expression (this extension) and a compose element is present, the compose is understood to make the same statement as the expression. If there is no compose, the expression is the only definition of the value set and the ValueSet definition (compose) can only be evaluated by a system that understands the syntax used in the expression.
Maturity: 3
This structure is derived from Extension
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
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0..1 | Extension | An alternative computable expression of the value set content | |
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0..0 | |||
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1..1 | uri | "http://hl7.org/fhir/StructureDefinition/valueset-expression" | |
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1..1 | Expression | Value of extension | |
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Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
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0..1 | Extension | An alternative computable expression of the value set content | |
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0..1 | id | Unique id for inter-element referencing | |
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0..0 | |||
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1..1 | uri | "http://hl7.org/fhir/StructureDefinition/valueset-expression" | |
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1..1 | Expression | Value of extension | |
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This structure is derived from Extension
Summary
Simple Extension with the type Expression: An expression that provides an alternative definition of the content of the value set (compose). There are two different ways to use this expression extension: If both an expression (this extension) and a compose element is present, the compose is understood to make the same statement as the expression. If there is no compose, the expression is the only definition of the value set and the ValueSet definition (compose) can only be evaluated by a system that understands the syntax used in the expression.
Maturity: 3
Differential View
This structure is derived from Extension
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
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0..1 | Extension | An alternative computable expression of the value set content | |
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0..0 | |||
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1..1 | uri | "http://hl7.org/fhir/StructureDefinition/valueset-expression" | |
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1..1 | Expression | Value of extension | |
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Snapshot View
Name | Flags | Card. | Type | Description & Constraints Filter: ![]() ![]() |
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0..1 | Extension | An alternative computable expression of the value set content | |
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0..1 | id | Unique id for inter-element referencing | |
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0..0 | |||
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1..1 | uri | "http://hl7.org/fhir/StructureDefinition/valueset-expression" | |
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1..1 | Expression | Value of extension | |
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Other representations of profile: CSV, Excel, Schematron
Id | Grade | Path(s) | Details | Requirements |
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() |
The extension is unchanged in R4B
The extension is unchanged in R4
The extension is represented a little differently in R3:
Name | Flags | Card. | Type |
Description & Constraints
Filter: ![]() ![]() |
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0..1 | Extension | An alternative computable expression of the value set content | |||||
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0 ..* | Extension |
Extension
Slice: Unordered, Open by value:url |
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1..1 | (Complex) |
DataType name 'Expression' from R5 URL: http://hl7.org/fhir/StructureDefinition/_datatype |
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1.. 1 | string |
Value of extension
Fixed Value: Expression |
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0..1 | Extension | Natural language description of the condition | |||||
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0 .. 0 | |||||||
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1 .. 1 | uri | "description" | |||||
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1.. 1 | string | Value of extension | |||||
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0..1 | Extension | Short name assigned to expression for reuse | |||||
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0 .. 0 | |||||||
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1 .. 1 | uri | "name" | |||||
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1.. 1 | code | Value of extension | |||||
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0..1 | Extension | text/cql | text/fhirpath | application/x-fhir-query | etc. | |||||
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0 .. 0 | |||||||
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1 .. 1 | uri | "language" | |||||
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1.. 1 | code |
Value of extension
Binding: ExpressionLanguage ( extensible ) : The media type of the expression language.
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0..1 | Extension | Expression in specified language | |||||
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0 .. 0 | |||||||
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1 .. 1 | uri | "expression" | |||||
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1.. 1 | string | Value of extension | |||||
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0..1 | Extension | Where the expression is found | |||||
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0 .. 0 | |||||||
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1 .. 1 | uri | "reference" | |||||
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1.. 1 | uri | Value of extension | |||||
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1 .. 1 | uri | "http://hl7.org/fhir/StructureDefinition/valueset-expression" | |||||
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0 .. 0 | |||||||
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(none found)