Meta Updated By Extension

Canonical	../StructureDefinition/meta-updated-by
Status	draft · 1.26.0
Base	Extension (constraint)
Context	Meta (element)
Source	FSH · JSON

The user account that last wrote this version of the resource.

Overview

A display convenience, not an audit record. It exists so a version list can say who touched each version without fetching a Provenance per row. Anything that needs to REASON about authorship -- rather than print it -- should read Provenance or the resource's own author element.

The value is an identity-provider subject, not a Reference. It names a user account; not every writer has a Practitioner resource, and a dangling reference would be worse than a string a consumer can match on. Resolving it to a person needs the identity directory, which this guide does not describe.

Readers should expect two canonicals. This publishes under this guide's base; the EMR writes it today under http://services.well.com/fhir/StructureDefinition/UpdatedBy, and because this rides meta on every version of every resource ever saved, the old address persists in version history even after writers move. Match both addresses exactly. The two share no segment, so a suffix rule does not reach the pre-migration one and a reader built on it misses every pre-migration version. The handbook's Canonical URLs page indexes every published artifact in this position.