Release 5 Draft Ballot

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. 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

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 (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')]))
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)