Hi, I would like to show 13-digit ISBN (ean compatible) on opac .. We have 13-digit isbn in 'biblioitems.isbn' but I'm not sure how to get this info in opac-detail.pl. Using 'normalized_ean' in template produces nothing :) because it implies having 024 field value.. I could add GetNormalizedEAN--something() function to do something similar as GetNormalizedISBN but I'm not sure what's the proper (Koha) way to achieve what I want. So, how to properly handle 10 and 13 digit ISBN-s? tnx, -- alen