Da Vinci - Documentation Templates and Rules
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Da Vinci - Documentation Templates and Rules, published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 2.2.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/davinci-dtr/ and changes regularly. See the Directory of published versions

Extension: Alternative Expression

Official URL: http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression Version: 2.2.0-ballot
Standards status: Trial-use Active as of 2025-11-04 Maturity Level: 2 Computable Name: AlternativeExpression

Provides an alternate expression containing the compiled JSON ELM for an expression. (NOTE: The expectation is that this extension will transition to the core extensions pack)

Context of Use

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

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Alternative Expression
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression"
... value[x] 1..1 Expression Alternate expression containing compiled JSON ELM.

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Alternative Expression
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression"

doco 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 Expression: Provides an alternate expression containing the compiled JSON ELM for an expression. (NOTE: The expectation is that this extension will transition to the core extensions pack)

Maturity: 2

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Alternative Expression
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression"
... value[x] 1..1 Expression Alternate expression containing compiled JSON ELM.

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Alternative Expression
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression"

doco 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 Expression: Provides an alternate expression containing the compiled JSON ELM for an expression. (NOTE: The expectation is that this extension will transition to the core extensions pack)

Maturity: 2

 

Other representations of profile: CSV, Excel, Schematron