R4 Ballot #1 (Mixed Normative/Trial use) Current Build
This is the FHIR R4 Mixed Normative/Trial Use Ballot #1, and the version for the Cologne Connectathon in May 2018. The current version is R3 . See the ballot introduction for details about the ballot. For a full list of available versions, see the Directory of published versions and Timelines for an explanation of STU and other statuses.
FHIR Infrastructure Work Group Maturity Level : 5 Normative Ballot Standards 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. null
Standards Status This element has a standards status of "Normative" which is different to the status of the whole resource

Base definition for all elements in a resource.

Control Cardinality 1..1 0..*
Defined on this element
ele-1 : Rule All FHIR elements must have a @value or children ( expression : hasValue() | or (children().count() > id.count()), xpath: @value|f:*|h:div) id.count())
Affect this element

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

Control Cardinality 0..1
Type string

May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

Control Cardinality 0..*
Type Extension
Alternate Names extensions; user content

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.