Categorical Table numbers added to any notation from the schedules, e.g. …
Economics of universities = A180.760
Universities = A180 [schedules]
Economics = .760 [Categorical Table]
Economics of musical competitions = C798.760
Musical competitions = C798 [schedules]
Economics = .760 [Categorical Table]
These synthetic notations provided more flexibility than any classification of its time (except UDC, which had the same auxiliary tables for synthesis it has now) (e.g., Manuel, 1907.)
Gambling in dog racing = L933 + F944
Called “composite subjects” or “composite books”
No preferred citation order