Release 5 Preview #2

This page is part of the FHIR Specification (v4.4.0: R5 Preview #2). 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: objectClass

FHIR Infrastructure Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

http://hl7.org/fhir/StructureDefinition/11179-objectClass

Status: draft. Extension maintained by: Health Level Seven International (Orders and Observations)

A concept that represents a set of ideas, abstractions, or things in the real world that can be identified with explicit boundaries and meaning and whose properties and behavior follow the same rules. It may be either a single concept or a group of associated concepts, abstractions, or things.

Comment:

ObjectClass and Property are treated as a data model that can be mapped to, like any other. This extension merely captures the ObjectClass element as a discrete code. The information conveyed here should also be conveyed in human-readable form in the mapping.map element.

Context of Use: Use on Element ID ElementDefinition.mapping

Summary

Name	Flags	Card.	Type	Description & Constraints
objectClass		0..1	Coding	URL = http://hl7.org/fhir/StructureDefinition/11179-objectClass objectClass: A concept that represents a set of ideas, abstractions, or things in the real world that can be identified with explicit boundaries and meaning and whose properties and behavior follow the same rules. It may be either a single concept or a group of associated concepts, abstractions, or things. Binding: DataElement SDC Object Class (example) Use on Element ID ElementDefinition.mapping
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/11179-objectClass objectClass: A concept that represents a set of ideas, abstractions, or things in the real world that can be identified with explicit boundaries and meaning and whose properties and behavior follow the same rules. It may be either a single concept or a group of associated concepts, abstractions, or things. Use on Element ID ElementDefinition.mapping
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/11179-objectClass"
value[x]	I	1..1	Coding	Value of extension Binding: DataElement SDC Object Class (example)
Documentation for this format

XML Template

<!-- objectClass -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/11179-objectClass" >
  <!-- from Element: extension -->
 <valueCoding><!--  1..1 Coding Value of extension --></valueCoding>
</extension>

JSON Template

{ // objectClass
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/11179-objectClass", // R! 
    "valueCoding" : { Coding } // C? R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
objectClass		0..1	Coding	URL = http://hl7.org/fhir/StructureDefinition/11179-objectClass objectClass: A concept that represents a set of ideas, abstractions, or things in the real world that can be identified with explicit boundaries and meaning and whose properties and behavior follow the same rules. It may be either a single concept or a group of associated concepts, abstractions, or things. Binding: DataElement SDC Object Class (example) Use on Element ID ElementDefinition.mapping
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/11179-objectClass objectClass: A concept that represents a set of ideas, abstractions, or things in the real world that can be identified with explicit boundaries and meaning and whose properties and behavior follow the same rules. It may be either a single concept or a group of associated concepts, abstractions, or things. Use on Element ID ElementDefinition.mapping
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/11179-objectClass"
value[x]	I	1..1	Coding	Value of extension Binding: DataElement SDC Object Class (example)
Documentation for this format

XML Template

<!-- objectClass -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/11179-objectClass" >
  <!-- from Element: extension -->
 <valueCoding><!--  1..1 Coding Value of extension --></valueCoding>
</extension>

JSON Template

{ // objectClass
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/11179-objectClass", // R! 
    "valueCoding" : { Coding } // 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)