Greetings, http://marcedit.reeset.net/ MarcEdit is a Windows utility that can help you easily convert. It also can help you pre-validate the data and make sure it is good before importing. http://bywatersolutions.com/2012/02/29/altering-marc-records-in-marcedit-bef... I'm sure there are other great videos on the bywatersolutions website that might be helpful too. Also, you might want to make sure the data has the appropriate holdings fields too. :) http://wiki.koha-community.org/wiki/Holdings_data_fields_%289xx%29 Plus if you want to write your own. Coding is a fun challenge, right? :) http://search.cpan.org/~gmcharlt/MARC-XML-1.0.3/lib/MARC/File/XML.pm http://search.cpan.org/~gmcharlt/MARC-Record-2.0.6/lib/MARC/Record.pm GPML, Mark Tompsett