Apple Certifications Exam 9L0-509

Most librarians and 9L0-402 archivists have accepted the basic wisdom -- for now at least -- that digital preservation depends upon copying, not on the survival of the physical media (Lesk). But copying, also referred to as "refreshing" or "migration" is more complex than simply transferring a stream of bits from old to new media or from one generation of systems to the next. Complex and expensive transformations of digital objects often are necessary to preserve digital materials so that they remain authentic representations of the original versions and useful sources for analysis and research (Task Force on Archiving of Digital Information).

Current methods for 9L0-509 preserving digital materials do not fully support achieving these objectives. When faced with the responsibility for preserving digital materials, archives and libraries face a series of complex and difficult choices based on the format of the original materials,