Release 4B

Extension: minLength

FHIR Infrastructure Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

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

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.

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

Summary

Name	Flags	Card.	Type	Description & Constraints
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
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
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
Documentation for this format

XML Template

<!-- minLength -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/minLength" >
  <!-- from Element: extension -->
 <valueInteger value="[integer]"/><!--  1..1 Value of extension -->
</extension>

JSON Template

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

Summary

Name	Flags	Card.	Type	Description & Constraints
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
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
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
Documentation for this format

XML Template

<!-- minLength -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/minLength" >
  <!-- from Element: extension -->
 <valueInteger value="[integer]"/><!--  1..1 Value of extension -->
</extension>

JSON Template

{ // minLength
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/minLength", // R! 
    "valueInteger" : <integer> // C? 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)
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)