Release 5 Draft Ballot

This page is part of the FHIR Specification (v4.6.0: R5 Draft Ballot). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions

Extension: alternativeExpression

FHIR Infrastructure Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression

Status: draft. Extension maintained by: Health Level Seven, Inc. - CDS WG

Specifies an alternative, equivalent expression in another formal language. For example, given a condition expression in CQL, an alternative formulation in SQL could be provided.

Comment:

This extension can be used on any Expression, including other Expression extensions such as cqf-expression, cqf-initialValue, and cqf-calculatedValue.

Context of Use: Use on Element ID Expression

Summary

Name	Flags	Card.	Type	Description & Constraints
alternativeExpression		0..1	Expression	URL = http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression alternativeExpression: Specifies an alternative, equivalent expression in another formal language. For example, given a condition expression in CQL, an alternative formulation in SQL could be provided. Use on Element ID Expression
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression alternativeExpression: Specifies an alternative, equivalent expression in another formal language. For example, given a condition expression in CQL, an alternative formulation in SQL could be provided. Use on Element ID Expression
extension	0..0
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression"
value[x]	1..1	Expression	Value of extension
Documentation for this format

XML Template

<!-- alternativeExpression -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression" >
  <!-- from Element: extension -->
 <valueExpression><!--  1..1 Expression Value of extension --></valueExpression>
</extension>

JSON Template

{ // alternativeExpression
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression", // R! 
    "valueExpression" : { Expression } // C? R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
alternativeExpression		0..1	Expression	URL = http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression alternativeExpression: Specifies an alternative, equivalent expression in another formal language. For example, given a condition expression in CQL, an alternative formulation in SQL could be provided. Use on Element ID Expression
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression alternativeExpression: Specifies an alternative, equivalent expression in another formal language. For example, given a condition expression in CQL, an alternative formulation in SQL could be provided. Use on Element ID Expression
extension	0..0
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression"
value[x]	1..1	Expression	Value of extension
Documentation for this format

XML Template

<!-- alternativeExpression -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression" >
  <!-- from Element: extension -->
 <valueExpression><!--  1..1 Expression Value of extension --></valueExpression>
</extension>

JSON Template

{ // alternativeExpression
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/cqf-alternativeExpression", // R! 
    "valueExpression" : { Expression } // C? R! Value of extension
  }

Constraints

ele-1: All FHIR elements must have a @value or children (xpath: @value|f:*|h:div)
ext-1: Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')]))
ele-1: On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.value[x]: @value|f:*|h:div)