Rachel: Thanks a lot for your information. I have the following puzzle to be solved.
In http://hlt.katipo.co.nz/, if you search by "Understanding your brain" by Title in the cataloge page. Then you click the TITLE Understanding your brain, You get the Class J612.82. How did J get into it? What did J represent and how can I input it into the Koha system?
As it's a non fiction book the class is the dewey number. You enter it either as part of acquisioning a book or if you've already got an entry, by clicking on the "modify" button in the group record - you get this page.
http://hlt.katipo.co.nz/cgi- bin/koha/modbibitem.pl?bibitem=93999&biblio=41244&submit.x= 41&submit.y =22
However, if I enter J612.82 as part of acquisioning a book, Koha doesn't take it. By I do can modify it to J612.82 or a123 as you showed me(for that thanks a lot). It seems in acquisionting page, the dewey number can not take anything with letters. It can only take numbers. That is the reason why I ask how did this J get into http://hlt.katipo.co.nz/ dewey part? Thanks again! Yaogeng