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• Content
• Detailed Descriptions
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Extension: regex

URL for this extension:

http://hl7.org/fhir/StructureDefinition/regex

Status: draft. Extension maintained by: Health Level Seven International (FHIR Infrastructure)

A regular expression that defines the syntax for the data element to be considered valid.

Context of Use: Use on element: Questionnaire.item, ElementDefinition

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

Extension Content

• Summary
• Full Structure
• XML
• JSON
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Summary

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	string	URL = http://hl7.org/fhir/StructureDefinition/regex regex: A regular expression that defines the syntax for the data element to be considered valid. Use on element: Questionnaire.item, ElementDefinition
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/regex regex: A regular expression that defines the syntax for the data element to be considered valid. Use on element: Questionnaire.item, ElementDefinition
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/regex"
valueString		0..1	string	Value of extension
Documentation for this format

XML Template

<!-- regex -->

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

JSON Template

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

Summary

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	string	URL = http://hl7.org/fhir/StructureDefinition/regex regex: A regular expression that defines the syntax for the data element to be considered valid. Use on element: Questionnaire.item, ElementDefinition
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/regex regex: A regular expression that defines the syntax for the data element to be considered valid. Use on element: Questionnaire.item, ElementDefinition
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/regex"
valueString		0..1	string	Value of extension
Documentation for this format

XML Template

<!-- regex -->

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

JSON Template

{ // regex
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/regex", // 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')]))