This page is part of the FHIR Specification (v5.0.0-ballot: R5 Ballot - 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

Extension: constraint

FHIR Infrastructure Work Group

Maturity Level: 1

Informative

Use Context: Any

Summary

Defining URL: http://hl7.org/fhir/StructureDefinition/questionnaire-constraint

Version: 5.0.0-ballot

Name: constraint

Title: null

Modifier: This extension is not a modifier extension

Status: draft

Definition: An invariant that must be satisfied before responses to the questionnaire can be considered "complete".

Committee: FHIR Infrastructure Work Group

Status: draft. Extension maintained by: HL7

An invariant that must be satisfied before responses to the questionnaire can be considered "complete".

Comment:

This maps to the ElementDefinition.constraint element. See additional guidance and examples in the SDC implementation guide.

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

Summary

Name	Card.	Type	Description & Constraints
constraint	0..*	Extension	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-constraint constraint: An invariant that must be satisfied before responses to the questionnaire can be considered "complete". Use on Element ID Questionnaire, Element ID Questionnaire.item or Element ID ElementDefinition
key	1..1	id	Unique identifier
requirements	0..1	string	Why needed
severity	1..1	code	error\|warning Binding: ConstraintSeverity (required): How important the invariant is.
expression	1..1	string	Formal rule
human	1..1	string	Human-readable rule
location	0..*	string	Relative path to elements
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..*	Extension	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-constraint constraint: An invariant that must be satisfied before responses to the questionnaire can be considered "complete". Use on Element ID Questionnaire, Element ID Questionnaire.item or Element ID ElementDefinition
Slices for extension	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
extension:key	1..1	Extension	Unique identifier
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"key"
value[x]	1..1	id	Value of extension
extension:requirements	0..1	Extension	Why needed
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"requirements"
value[x]	1..1	string	Value of extension
extension:severity	1..1	Extension	error\|warning
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"severity"
value[x]	1..1	code	Value of extension Binding: ConstraintSeverity (required): How important the invariant is.
extension:expression	1..1	Extension	Formal rule
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"expression"
value[x]	1..1	string	Value of extension
extension:human	1..1	Extension	Human-readable rule
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"human"
value[x]	1..1	string	Value of extension
extension:location	0..*	Extension	Relative path to elements
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"location"
value[x]	1..1	string	Value of extension
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/questionnaire-constraint"
value[x]	0..0
Documentation for this format

XML Template

<!-- constraint -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-constraint" >
 <-- extension sliced by value:url  in the specified orderOpen-->
 <extension url="key"> I 1..1 Extension  <!-- I 1..1 Unique identifier -->
  <valueId value="[id]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="requirements"> I 0..1 Extension  <!-- I 0..1 Why needed -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="severity"> I 1..1 Extension  <!-- I 1..1 error|warning -->
  <valueCode value="[code]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="expression"> I 1..1 Extension  <!-- I 1..1 Formal rule -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="human"> I 1..1 Extension  <!-- I 1..1 Human-readable rule -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="location"> I 0..* Extension  <!-- I 0..* Relative path to elements -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
</extension>

JSON Template

{ // constraint
    "extension" : [ //  sliced by value:url  in the specified order, Open 
      { // Unique identifier // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "key", // R! 
        "valueId" : "<id>" // I R! Value of extension
      },
      { // Why needed // I
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "requirements", // R! 
        "valueString" : "<string>" // I R! Value of extension
      },
      { // error|warning // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "severity", // R! 
        "valueCode" : "<code>" // I R! Value of extension
      },
      { // Formal rule // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "expression", // R! 
        "valueString" : "<string>" // I R! Value of extension
      },
      { // Human-readable rule // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "human", // R! 
        "valueString" : "<string>" // I R! Value of extension
      },
      { // Relative path to elements // I
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "location", // R! 
        "valueString" : "<string>" // I R! Value of extension
      }
    ],
    "extension" : [{ Extension }], // IAdditional content defined by implementations
    "extension" : { Extension }, // I R! Unique identifier
    "extension" : { Extension }, // IWhy needed
    "extension" : { Extension }, // I R! error|warning
    "extension" : { Extension }, // I R! Formal rule
    "extension" : { Extension }, // I R! Human-readable rule
    "extension" : [{ Extension }], // IRelative path to elements
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-constraint" // R! 
  // value[x]: Value of extension: Prohibited
  }

Summary

Name	Card.	Type	Description & Constraints
constraint	0..*	Extension	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-constraint constraint: An invariant that must be satisfied before responses to the questionnaire can be considered "complete". Use on Element ID Questionnaire, Element ID Questionnaire.item or Element ID ElementDefinition
key	1..1	id	Unique identifier
requirements	0..1	string	Why needed
severity	1..1	code	error\|warning Binding: ConstraintSeverity (required): How important the invariant is.
expression	1..1	string	Formal rule
human	1..1	string	Human-readable rule
location	0..*	string	Relative path to elements
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..*	Extension	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-constraint constraint: An invariant that must be satisfied before responses to the questionnaire can be considered "complete". Use on Element ID Questionnaire, Element ID Questionnaire.item or Element ID ElementDefinition
Slices for extension	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
extension:key	1..1	Extension	Unique identifier
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"key"
value[x]	1..1	id	Value of extension
extension:requirements	0..1	Extension	Why needed
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"requirements"
value[x]	1..1	string	Value of extension
extension:severity	1..1	Extension	error\|warning
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"severity"
value[x]	1..1	code	Value of extension Binding: ConstraintSeverity (required): How important the invariant is.
extension:expression	1..1	Extension	Formal rule
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"expression"
value[x]	1..1	string	Value of extension
extension:human	1..1	Extension	Human-readable rule
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"human"
value[x]	1..1	string	Value of extension
extension:location	0..*	Extension	Relative path to elements
id	0..1	id	Unique id for inter-element referencing
extension	0..0
url	1..1	uri	"location"
value[x]	1..1	string	Value of extension
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/questionnaire-constraint"
value[x]	0..0
Documentation for this format

XML Template

<!-- constraint -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-constraint" >
 <-- extension sliced by value:url  in the specified orderOpen-->
 <extension url="key"> I 1..1 Extension  <!-- I 1..1 Unique identifier -->
  <valueId value="[id]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="requirements"> I 0..1 Extension  <!-- I 0..1 Why needed -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="severity"> I 1..1 Extension  <!-- I 1..1 error|warning -->
  <valueCode value="[code]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="expression"> I 1..1 Extension  <!-- I 1..1 Formal rule -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="human"> I 1..1 Extension  <!-- I 1..1 Human-readable rule -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
 <extension url="location"> I 0..* Extension  <!-- I 0..* Relative path to elements -->
  <valueString value="[string]"/><!-- I 1..1 Value of extension -->
 </extension>
</extension>

JSON Template

{ // constraint
    "extension" : [ //  sliced by value:url  in the specified order, Open 
      { // Unique identifier // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "key", // R! 
        "valueId" : "<id>" // I R! Value of extension
      },
      { // Why needed // I
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "requirements", // R! 
        "valueString" : "<string>" // I R! Value of extension
      },
      { // error|warning // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "severity", // R! 
        "valueCode" : "<code>" // I R! Value of extension
      },
      { // Formal rule // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "expression", // R! 
        "valueString" : "<string>" // I R! Value of extension
      },
      { // Human-readable rule // I R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "human", // R! 
        "valueString" : "<string>" // I R! Value of extension
      },
      { // Relative path to elements // I
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "location", // R! 
        "valueString" : "<string>" // I R! Value of extension
      }
    ],
    "extension" : [{ Extension }], // IAdditional content defined by implementations
    "extension" : { Extension }, // I R! Unique identifier
    "extension" : { Extension }, // IWhy needed
    "extension" : { Extension }, // I R! error|warning
    "extension" : { Extension }, // I R! Formal rule
    "extension" : { Extension }, // I R! Human-readable rule
    "extension" : [{ Extension }], // IRelative path to elements
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-constraint" // R! 
  // value[x]: Value of extension: Prohibited
  }

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.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.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
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.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
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.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
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.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
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.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
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.extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.extension.value[x]: @value|f:*|h:div)
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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