Background:  The commenter is referencing this page DSTU2 to R4 Conversion Introduction Endpoint Discoverability No Guarantee that Resource IDs are Preserved Expectation that DSTU2 Data is Preserved in R4 Authorization Across Versions Introduction There are several consideration for the user and developer experience when transitioning from FHIR DSTU2 to FHIR R4. To ensure a smoother upgrade path the following the guidance is provided. ...   Rationale: We agree with the commenter that the intent of conformance expectations on this page is ambiguous and should be clarified   Proposed Changes: Will clarify the Document to state that  "This page reflects non-normative best practices established at the time of publication." Remove all conformance language ( i.e., replace SHALL with shall)