Hi Usually the database schema of the Koha versions can be found under http://schema.koha-community.org/ but there is no database schema for Koha 17.11. Also it cannot be found under an URL looking like http://schema.koha-community.org/17_11/ (which results in nginx error 404 Not found). Does anyone know where it can be found or how to create it? There is a database schema for the "Koha development version" under http://schema.koha-community.org/master/ but this stems from 26 June 2017 and so is a little outdated. Best wishes: Michael -- Geschäftsführer · Diplombibliothekar BBS, Informatiker eidg. Fachausweis Admin Kuhn GmbH · Pappelstrasse 20 · 4123 Allschwil · Schweiz T 0041 (0)61 261 55 61 · E mik@adminkuhn.ch · W www.adminkuhn.ch