Preservation and Utilization of Materials in the NDL Digital Collections

Abstract

The National Diet Library Digital Collections, operated by the National Diet Library is a digital archive that houses a wide variety of materials. Beyond digitized images scanned from physical documents and electronic documents published in formats such as PDF and ePub, the collection includes content extracted from CD-ROMs and videos digitized from laser disks. This paper will explain the technical elements involved in the preservation and provision of content in this system. It will also discuss how not only the replication but also its utilization of this content contributes to its long-term preservation for future generations.