This page is part of the FHIR Specification (v4.3.0: R4B - STU). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B
Helps a user track down the source of the problem.
A reference to where the rule is defined (based on the authoritative URLs in the applicable conformance resources).
A reference to a stored contraindication that is the basis for this issue. A recipient can expect that the item referenced in this extension is being retained for record keeping purposes.