Release 4B Snapshot #1
FoundationThis page is part of the FHIR Specification v4.3.0-snapshot1: R4B Snapshot to support the Jan 2022 Connectathon. About the R4B version of FHIR. The current officially released version is 4.3.0. For a full list of available versions, see the Directory of published versions 
. Page versions: R5 R4B R4 R3 R2
| FHIR Infrastructure Work Group | Maturity Level: Normative | Standards Status: Normative |
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This page has been approved as part of an ANSI standard.
See the Infrastructure Package for further details.
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| Extension | |||||||||
| Standards Status | This element has a standards status of "Normative" | ||||||||
| Definition | Optional Extension Element - found in all resources. | ||||||||
| Cardinality | 0..* | ||||||||
| Type | Element | ||||||||
| Requirements | The ability to add extensions in a structured way is what keeps FHIR resources simple. | ||||||||
| Invariants |
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| Extension.url | |||||||||
| Definition | Source of the definition for the extension code - a logical name or a URL. | ||||||||
| Cardinality | 1..1 | ||||||||
| Type | uri | ||||||||
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. | ||||||||
| Extension.value[x] | |||||||||
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). | ||||||||
| Cardinality | 0..1 | ||||||||
| Type | * | ||||||||
| [x] Note | See Choice of Data Types for further information about how to use [x] | ||||||||
FHIR ®© HL7.org 2011+. FHIR R4B Ballot #1 hl7.fhir.core#4.3.0-snapshot1 generated on Mon, Dec 20, 2021 14:15+1100.
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