The DIGITAL LIBRARY OF SU “ST. KLIMENT OHRIDSKI” (http://lib.sudigital.org) is developed in full compliance with the Bulgarian, European and international legislation in the field of copyright. It is based on the key principles and goals that are set out in the European Commission Recommendation of 27 October 2011 on the digitalization and online accessibility of cultural material and digital preservation, in the IFLA/UNESCO Manifesto for Digital Libraries of 2011 (IFLA - International Federation of Library Associations), as well as in the IFLA Glasgow Declaration on Libraries, Information Services and Intellectual Freedom (27 March 2002).