[Koha] creating database without using MARC21/UNIMARC

[lib at gndec.ac.in]

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