Comment:

Instead of enumerating the specific combinations of query parmaters that are required, identify the individual query paramters that must be supported. E.g., instead of saying – DiagnosticReport must support search by "patient + category", "patient + code", and "patient + category + date", require that searches must support searches by patient, category, code, and date. Without this, for example, it is implied that an EHR does not need to support "patient + code + date" as a search pattern, even though what an EHR must implement to support the enumerated combinations would imply that there should be little additional effort to support that specific combination. Further restrictions could still be added – such as that "patient" must always be in the query. Comments applies to all US Core FHIR profiles.

Summary:

Enumerate required search paramters rather than specific combinations of search parameters