When analysing the application, the search division concentrates on trying to understand what technical contribution the invention as defined in the claims adds to the known art. This should normally be sufficiently clear from the application as filed. If it is not, an objection is raised in the search opinion (see F‑II, 4.5); but the search division does not raise an objection of this kind unless it is convinced it is necessary, since to do so might result in the applicant introducing additional subject-matter and thus offending against Art. 123(2) (see H‑IV, 2, and H‑V).[Rule 42(1)(c); ]