This page is part of the FHIR Specification (v4.3.0: R4B -  STU). This is a downloaded version of the specification.  For a full list of available versions, see the Directory of published versions 
FHIR Infrastructure    Work Group | Maturity Level: N/A | Standards Status: Informative | 
This specification is currently in its third round of trial use. While some parts of the specification are mature and stable, and HL7 is focusing on moving these to a formal standard, much work remains to be done in other areas. The following general areas of functionality have been deferred to a future version, or are incompletely covered in this version:
For some of these, some draft content is included in the specification for implementer consideration.
In addition, there are a number of specific notes in the specification requesting feedback from implementers: