[Koha] Dewey entry

[Roger Buck]

I am in the process of migrating items from our current library system
into koha and I have a question about Koha Dewey entries.

When adding Dewey entry for new biblio I note two fields:

 "Dewey" and "Dewey Subclass"

All our current entries follow this format:

 JSM 428.007 WEN
 JSM 362.2 TOP 
 JSM 170 VER

 ...and so on...

What is the correct way to enter above data into the Koha Dewey
field(s)? 

Thanks,

R.