Comment:

Alignment with CTS2 is asserted, but not detailed, and its nature is hard to evaluate. It would be nice for the terminology services to be mapped explicitly (e.g., "expand" = "resolve"; "batch"="contains"; etc., with caveats & deltas). Or, e.g., what's the relationship between 1.23.6.5 lookup & 1.23.6.12.2 "Retrieve the concept details (display name, qualifiers, associations, etc.) for a given code"?