Dear LIS Professionals, Can you please give any suggestion regarding my problems of classification? I am now following 20th ED. of DDC, but I like to shift to the 22nd ED. The major areas in which I am facing problems are 570-590. In these areas, the class numbers existing in the 20th ED. are scattered and intermingled in the 21st and 22nd ED.in such a way that if I shift to the new numbers, the other areas are being largely affected, and hence, any 'see also' reference is likely to be impossible to be rendered in the catalogue. But if the newly emerging subject areas are to be taken into account, I must shift to the latest edition. Reclassification may only be the solution, but it is not feasible everytime there is a major change, and as there is a large no. of collections. I am seeking your views and help. Regards, Shikha Bhowmik Associate Scientist, Indian Statistical Institute Library, Kolkata -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.