Reference-extensions - FHIR v5.0.0-ballot

Release 5 Ballot

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

Common extensions for Reference data type

FHIR Infrastructure Work Group

Maturity Level: N/A

Standards Status: Informative

Defines "common" extensions for use with the Reference data type

Content

Extensions:
targetElement	targetElement : Indicates that the reference has a particular focus in the target resource, a particular element of interest, identified by it's element id.
targetPath	targetPath : Indicates that the reference has a particular focus in the target resource, a particular element of interest, identified by a FHIRPath statement. The FHIRPath expression is limited to a the simple subset with the additional limitation that .resolve() that is not allowed.
resolve-as-version-specific	resolve-as-version-specific : If true, indicates that the reference should be resolved to a version-specific reference rather than a version-agnostic reference.
additionalIdentifier	additionalIdentifier : An additional identifier for the target resource. This is used when there is no way to reference the other resource directly, either because the entity it represents is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference.