Hi guys, An uptodate DB schema is avaible :-) Many people asked for this schema. I've done it. Look at Koha wiki (www.koha.org/wiki), Developper link chapter. The 2 pages schema is avaible in 3 formats : jpg (2 images), PDF and OpenOffice.org (original format) HTH -- Paul POULAIN Consultant indépendant en logiciels libres responsable francophone de koha (SIGB libre http://www.koha-fr.org)