Current Build

Extension: selector

FHIR Infrastructure Work Group Maturity Level: 1InformativeUse Context: Any

URL for this extension:

http://hl7.org/fhir/StructureDefinition/elementdefinition-selector

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

A FHIRPath statement that defines whether an element is in the slice.

Comment:

This extension can only appear on element definitions that are part of a set of slices, and not on the slicing definition itself. If the selector appears in the presence of nominated slices discriminators, then the slicing defined by the discriminator(s) and the selector on each slice must agree. In the absence of any nominated discriminators, then an element is allowed to be in multiple slices.

Context of Use: Use on Element ID ElementDefinition

usage info: insert a list of places where this extension is used

Extension Content

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. selector0..1stringURL = http://hl7.org/fhir/StructureDefinition/elementdefinition-selector
selector: A FHIRPath statement that defines whether an element is in the slice.


Use on Element ID ElementDefinition

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/elementdefinition-selector
selector: A FHIRPath statement that defines whether an element is in the slice.


Use on Element ID ElementDefinition
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/elementdefinition-selector"
... valueString 0..1stringValue of extension

doco Documentation for this format

XML Template

<!-- selector -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-selector" >
  <!-- from Element: extension -->
 <valueString value="[string]"/><!-- 0..1 Value of extension -->
</extension>

JSON Template

{ // selector
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-selector", // R! 
    "valueString" : "<string>" //Value of extension
  }

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. selector0..1stringURL = http://hl7.org/fhir/StructureDefinition/elementdefinition-selector
selector: A FHIRPath statement that defines whether an element is in the slice.


Use on Element ID ElementDefinition

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/elementdefinition-selector
selector: A FHIRPath statement that defines whether an element is in the slice.


Use on Element ID ElementDefinition
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/elementdefinition-selector"
... valueString 0..1stringValue of extension

doco Documentation for this format

XML Template

<!-- selector -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-selector" >
  <!-- from Element: extension -->
 <valueString value="[string]"/><!-- 0..1 Value of extension -->
</extension>

JSON Template

{ // selector
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-selector", // R! 
    "valueString" : "<string>" //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')]))