[Koha] creating database without using MARC21/UNIMARC

please tell me if anyyone using koha without using the MARC21 or UNIMARC standards.I try for this but i face these problems : 1.the database didn't show the copyright date . 2.If the classification no. is started with zeros,it also didn't display correctly & also not searchable if we search the record through classification no. 3.Deway subclass also not shown anywhere . i am also not clear exactly that what is fill in which field.. like this is a complete classification no. 004.33 L7831R it has 3 portions like Dewey main class: 004 Dewey subclass: .33 Item/book No.: L7831R which portion is meant for which part of the classification No? kanwaljit