Salient Field Extension

Canonical	../StructureDefinition/salient-field
Status	draft · 1.26.0
Base	Extension (constraint)
Context	StructureDefinition (element)
Source	FSH · JSON

One salient synthesized accessor on a profile: a named, typed FHIRPath value expression over the resource. Drives the reader/render surface (the AI chart) and the facade's salient accessors, distinct from the validation-scoped element set.

Invariants

Every rule in force on a conforming instance. This profile rows are stated here; inherited rows come from the base resource and are listed so that a constraint named on an element is findable. Invariant keys elsewhere on this page link into this table.

Key	Source	Severity	On	Rule
ele-1	inherited	error	Extension	All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1	inherited	error	Extension	Must have either extensions or value[x], not both extension.exists() != value.exists()