Release 4B 5 Ballot

This page is part of the FHIR Specification (v4.3.0: R4B (v5.0.0-ballot: R5 Ballot - STU see ballot notes ). 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 R3 R2

Extension: minLength

FHIR Infrastructure Work Group   Maturity Level : 1 Informative Use Context : Any

URL for this extension: http://hl7.org/fhir/StructureDefinition/minLength Summary

Defining URL: http://hl7.org/fhir/StructureDefinition/minLength
Version: 5.0.0-ballot
Name: minLength
Title: null
Modifier: This extension is not a modifier extension
Status: draft
Definition: The minimum number of characters that must be present in the simple data type to be considered a "valid" instance.
Committee: FHIR Infrastructure Work Group

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

The minimum number of characters that must be present in the simple data type to be considered a "valid" instance.

Comment :

For base64binary, reflects the number of characters representing the encoded data, not the number of bytes of the binary data. For questionnaires, see additional guidance and examples in the SDC implementation guide .

Context of Use: Use on Element ID Questionnaire.item or Element ID ElementDefinition

Extension Content

Summary

Name Flags Card. Type Description & Constraints doco
. . minLength 0..1 integer URL = http://hl7.org/fhir/StructureDefinition/minLength
minLength: The minimum number of characters that must be present in the simple data type to be considered a "valid" instance.


Use on Element ID Questionnaire.item or Element ID ElementDefinition

doco Documentation for this format

Full Structure

Name Flags Card. Type Description & Constraints doco
. . extension 0..1 Extension URL = http://hl7.org/fhir/StructureDefinition/minLength
minLength: The minimum number of characters that must be present in the simple data type to be considered a "valid" instance.


Use on Element ID Questionnaire.item or Element ID ElementDefinition
. . . extension 0..0
. . . url 1..1 uri "http://hl7.org/fhir/StructureDefinition/minLength"
. . . value[x] 1..1 integer Value of extension

doco Documentation for this format

XML Template 

<!-- minLength -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/minLength" >
  <!-- from Element: extension -->
 <

 <valueInteger value="[integer]"/><!-- I 1..1 Value of extension -->

</extension>

JSON Template 

{ // minLength
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/minLength", // R! 
    "

    "valueInteger" : <integer> // I R! Value of extension

  }

Summary

Name Flags Card. Type Description & Constraints doco
. . minLength 0..1 integer URL = http://hl7.org/fhir/StructureDefinition/minLength
minLength: The minimum number of characters that must be present in the simple data type to be considered a "valid" instance.


Use on Element ID Questionnaire.item or Element ID ElementDefinition

doco Documentation for this format

Full Structure

Name Flags Card. Type Description & Constraints doco
. . extension 0..1 Extension URL = http://hl7.org/fhir/StructureDefinition/minLength
minLength: The minimum number of characters that must be present in the simple data type to be considered a "valid" instance.


Use on Element ID Questionnaire.item or Element ID ElementDefinition
. . . extension 0..0
. . . url 1..1 uri "http://hl7.org/fhir/StructureDefinition/minLength"
. . . value[x] 1..1 integer Value of extension

doco Documentation for this format

XML Template 

<!-- minLength -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/minLength" >
  <!-- from Element: extension -->
 <

 <valueInteger value="[integer]"/><!-- I 1..1 Value of extension -->

</extension>

JSON Template 

{ // minLength
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/minLength", // R! 
    "

    "valueInteger" : <integer> // I R! Value of extension

  }

 

Constraints

  • ele-1 : All FHIR elements must have a @value or children unless an empty Parameters resource (xpath: @value|f:*|h:div|self::f:Parameters @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 )

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Examples of this extension

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