Existing Wording: Retrieve all Clinical Notes for a given Patient:

GET [base]/DocumentReference?patient=[id]&class=clinical-note

Example: GET [base]/DocumentReference?patient=1235541&class=clinical-note

Proposed Wording: Retrieve all Clinical Notes for a given Patient:

GET [base]/DocumentReference?patient=[id]&category=clinical-note

Example: GET [base]/DocumentReference?patient=1235541&category=clinical-note

Comment:

Incorrect parameter name. R4 uses category, not class.

Note that category(class) is not required by your DocumentReference Profile. So it needs to be clearly added by this Profile, or added to the imported profile. I recommend category be required in the us-core DocumentReference. (see other comment)

Summary:

Fix search to use category instead of class