An overview of the reason for DPN. Academic institutions require that their scholarly histories, heritage and research remain part of the academic record. This record needs to continue beyond the life spans of individuals, technological systems, and organizations. The loss of academic collections that are part of these institutions could be catastrophic. These collections, which include oral history collections, born digital artworks, historic journals, theses, dissertations, media and fragile digitizations of ancient documents and antiquities are irreplaceable resources.
DPN is structured to preserve the stored content by using diverse geographic, technical, and institutional environments. The preservation process consists of:
- Content is deposited into the system through an Ingest Node, which are preservation repositories themselves;
- Content is replicated to at least two other Replicating Nodes and stored in different types of repository infrastructures;
- Content is checked by bit auditing and repair services to prevent change or loss;
- Changed or corrupted content is restored by DPN;
- As Nodes enter and leave DPN, preserved content is redistributed to maintain the continuity of preservation services into the far-future.