R4 Ballot #2 (Mixed Normative/Trial use)

This page is part of the FHIR Specification (v3.5.0: R4 Ballot #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

2.29.0 BackboneElement

FHIR Infrastructure

Work Group

Maturity Level: 5

Ballot Status: Normative

Normative Candidate Note: This page is candidate normative content for R4 in the Infrastructure Package. Once normative, it will lose it's Maturity Level, and breaking changes will no longer be made.

The base definition for complex elements defined as part of a resource definition - that is, elements that have children that are defined in the resource. Data Type elements do not use this type, though a few data types specialize it (Timing, Dosage, ElementDefinition). For instance, Patient.contact is an element that is defined as part of the patient resource, so it automatically has the type BackboneElement.

Note that the descendant types of BackboneElement are all declared implicitly as part of the definitions of the resources.

Structure

Name	Flags	Card.	Type	Description & Constraints
BackboneElement	N		Element	Base for elements defined inside a resource Elements defined in Ancestors: id, extension
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored if unrecognized
Documentation for this format

UML Diagram (Legend)

XML Template

<[name] xmlns="http://hl7.org/fhir">
 <!-- from Element: extension -->
 <modifierExtension><!-- 0..* Extension Extensions that cannot be ignored if unrecognized --></modifierExtension>
</[name]>

JSON Template

{
  // from Element: extension
  (Modifier Extensions - see JSON page)
}

Turtle Template

@prefix fhir: <http://hl7.org/fhir/> .

[
 # from Element: Element.extension
  fhir:BackboneElement.modifierExtension [ Extension ], ... ; # 0..* Extensions that cannot be ignored if unrecognized
]

Changes since Release 3

No Changes

BackboneElement

See the Full Difference for further information