This page is part of the FHIR Specification (v5.0.0-ballot: FHIR R5 Ballot Preview). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R4B R4
Vocabulary Work Group | Maturity Level: 1 | Informative | Use Context: Any |
Summary
Defining URL: | http://hl7.org/fhir/StructureDefinition/valueset-expression |
Version: | 5.0.0-ballot |
Name: | expression |
Title: | null |
Modifier: | This extension is not a modifier extension |
Status: | draft |
Definition: | 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 the make the same statement as the expression. If there is no compose, the expression is the only definition of the value set, and the value set can only be processed by a server that understands the expression syntax, the expression is computable. |
Committee: | Vocabulary Work Group |
Status: draft. Extension maintained by: HL7
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 the make the same statement as the expression. If there is no compose, the expression is the only definition of the value set, and the value set can only be processed by a server that understands the expression syntax, the expression is computable.
Comment:
The expression may be a reference or the actual expression, and is expected to be in a computable format. Use the rules-text extension for a non-computable expression of the value set definition (compose).
Context of Use: Use on Element ID ValueSet
Summary
Name | Flags | Card. | Type | Description & Constraints |
---|---|---|---|---|
expression | 0..1 | Expression | URL = http://hl7.org/fhir/StructureDefinition/valueset-expression 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 the make the same statement as the expression. If there is no compose, the expression is the only definition of the value set, and the value set can only be processed by a server that understands the expression syntax, the expression is computable. Use on Element ID ValueSet | |
Documentation for this format |
Full Structure
Name | Flags | Card. | Type | Description & Constraints |
---|---|---|---|---|
extension | 0..1 | Extension | URL = http://hl7.org/fhir/StructureDefinition/valueset-expression 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 the make the same statement as the expression. If there is no compose, the expression is the only definition of the value set, and the value set can only be processed by a server that understands the expression syntax, the expression is computable. Use on Element ID ValueSet | |
extension | 0..0 | |||
url | 1..1 | uri | "http://hl7.org/fhir/StructureDefinition/valueset-expression" | |
value[x] | 1..1 | Expression | Value of extension | |
Documentation for this format |
XML Template
<!-- expression --> <extension xmlns="http://hl7.org/fhir" url="http://hl7.org/fhir/StructureDefinition/valueset-expression" > <!-- from Element: extension --> <valueExpression><!-- I 1..1 Expression Value of extension --></valueExpression> </extension>
JSON Template
{ // expression // from Element: extension "extension" : [ // sliced by value:url in the specified order, Open ] // extension: Extension: Prohibited "url" : "http://hl7.org/fhir/StructureDefinition/valueset-expression", // R! "valueExpression" : { Expression } // I R! Value of extension }
Summary
Name | Flags | Card. | Type | Description & Constraints |
---|---|---|---|---|
expression | 0..1 | Expression | URL = http://hl7.org/fhir/StructureDefinition/valueset-expression 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 the make the same statement as the expression. If there is no compose, the expression is the only definition of the value set, and the value set can only be processed by a server that understands the expression syntax, the expression is computable. Use on Element ID ValueSet | |
Documentation for this format |
Full Structure
Name | Flags | Card. | Type | Description & Constraints |
---|---|---|---|---|
extension | 0..1 | Extension | URL = http://hl7.org/fhir/StructureDefinition/valueset-expression 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 the make the same statement as the expression. If there is no compose, the expression is the only definition of the value set, and the value set can only be processed by a server that understands the expression syntax, the expression is computable. Use on Element ID ValueSet | |
extension | 0..0 | |||
url | 1..1 | uri | "http://hl7.org/fhir/StructureDefinition/valueset-expression" | |
value[x] | 1..1 | Expression | Value of extension | |
Documentation for this format |
XML Template
<!-- expression --> <extension xmlns="http://hl7.org/fhir" url="http://hl7.org/fhir/StructureDefinition/valueset-expression" > <!-- from Element: extension --> <valueExpression><!-- I 1..1 Expression Value of extension --></valueExpression> </extension>
JSON Template
{ // expression // from Element: extension "extension" : [ // sliced by value:url in the specified order, Open ] // extension: Extension: Prohibited "url" : "http://hl7.org/fhir/StructureDefinition/valueset-expression", // R! "valueExpression" : { Expression } // I R! Value of extension }
Constraints
Search
No Search Extensions defined for this resource |
Examples of this extension
No examples found.