ABSTRACT
Digital repositories allows digital intellectual production of a subject of what is called (objective) or what is related to an institution or what is called (institutional) either it was tight or loose, varied and without restriction or material condition with a minimum of legal restrictions, that will lead to provide long-term conservation of the available materials. Any other types of institutions can produces a large number of research or other intellectual production which makes it necessary to create repositories such as museums, governmental departments, international organizations, research centers, professional scientific societies and so on.
