Hi, call numbers having Cutter parts made of several substrings currently are not sorted correctly. Here are examples: | itemcallnumber | cn_source | cn_sort | | 530 F435 1996 v1 | ddc | 530_F435_199600000000000_V1 | | 530 F435 1996 v2p1 | ddc | 530_F435_199600000000000_V2P1 | | 530 F435 1996 v2p2 | ddc | 530_F435_199600000000000_V2P2 | Despite being in the Dewey 530 class, these items are sorted after any 530.xy item (and before any 531, which is OK). I suspect this has to do with the additional space separators: more than one seem to be too many. Any hint? What is the actual algorithm used by Koha to evaluate the cn_sort field (within the ddc scheme)? Grouping, or even merging, all the subfields after the Dewey into one single string was of no help. Many thanks and best regards, Giuseppe.