A Koha::Object sounds like extremely poor design. What kind of object is a Koha::Object, what are its properties, when we say a Koha::Biblio isa Koha::Object what does that mean? In practice what meaningful properties it has it inherits from Koha::Schema::Result::Biblio which is liable to be a better representation than the vaguer Onject. In practice I've recently written some scripts which in first version used some abstractions built around dbic ResultSets, As I added to them I stripped out out the abstractions and used the dbic result sets as I found this generated cleaner, more straightforward code. Colin -- Colin Campbell Chief Software Engineer, PTFS Europe Limited Content Management and Library Solutions +44 (0) 800 756 6803 (phone) +44 (0) 7759 633626 (mobile) colin.campbell@ptfs-europe.com skype: colin_campbell2 http://www.ptfs-europe.com