As technologies have developed information and communications technology (ICT), digital documents have been created directly in digital format or derived from the digitization of analog library materials that are distributed as tangible media or through computer networks and telecommunications. Its volume and cultural and scientific significance can not be ignored any longer, since they provide a vital heritage for training and information for individuals and societies. The European Union, UNESCO and IFLA, among other organizations, as well as recognize and promote actions for identification, description, organization and preservation
