[Koha] Bulkmarcimport.pl: importing new batch of records

[Tomasz Holdowanski]

Hi everyone,

I have set up Koha for testing, however the database I have imported is 
four months old. My colleagues complain about it and want me to add new 
records from other library software for more thorough testing. I could 
re-import the whole database, however it`s not a good solution in the 
long run - we have another ILS that has to stay for a while, all 
cataloging is done in that ILS and it has to stay that way for a year or 
so. I can prepare a batch of new records for importing into Koha, 
however don`t know if the bulkmarcimport script could do the job the way 
I`d like:
-  reject biblios that already are in the DB and import item-specific 
fields only, connecting them to existing biblios;
- import biblios that are not in the DB, along with items.

In other words: I need to perform many partial imports and avoid biblio 
and item duplicates. Has anyone tried something like that? Is there any 
way to do it?

Thanks for anyhelp!
Regards,
Tomasz.