Benedykt P. Barszcz wrote:

Hi Group, In opac-moredetail.tmpl there's a GROUP - section where it says: "Biblionumber", and in a BARCODE section "Biblio number:"

The "biblionumber" is the INTERNAL field. It's only for Koha. It's the primary key of the biblio table. The BARCODE number refers to the barcode attached to the book. It can't be a primary key because : - some libraries don't have barcodes - buggy (=duplicates) barcodes can exists -- Paul POULAIN Consultant indépendant en logiciels libres responsable francophone de koha (SIGB libre http://www.koha-fr.org)