As part of the "SDN" Digital Master Plan, the "BSN" Digital Strategy Office from Abu Bekr University Belkaid Tlemcen organized a training day on information gaps in the DSpace digital warehouse and the visibility of data by the search and cataloging engine Google scholar, on Tuesday, June 13, 2023 , at the Chetouane centre. This day of study is dedicated to the staff of the Library of Faculties of the University of Tlemcen and the ISTA Institute, and an opportunity to address their concerns about this subject.