extension shown: fhir [x]

Basic.subject

Defined in the fhir.schema.org extension.
Canonical URL: http://schema.org/Basic.subject

Thing > Property > Basic.subject

Identifies the patient, practitioner, device or any other resource that is the "focus" of this resource.

Usage: Fewer than 10 domains
Values expected to be one of these types
Resource
Used on these types
Basic

Schema Version 2.2