Attributed Fact Extension

Canonical	../StructureDefinition/nexus-attributed-fact
Status	draft (experimental) · 1.26.0
Base	Extension (constraint)
Context	Provenance (element)
Source	FSH · JSON

One factual statement in a piece of AI-generated text, together with the citation(s) that back it: verbatim quotes from the source material the statement was derived from.

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
attributed-fact-citations-are-substantive	this profile	error	Extension	Every citation must carry a non-empty verbatim quote, and the statement itself must be non-empty -- an empty string satisfies the cardinality while citing nothing, leaving a fact that cannot be audited against its source extension('statement').value.ofType(string) != '' and extension('citation').all(extension('quote').value.ofType(string) != '')
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()