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Collection-Based Persistent Digital Archives: Part 2 describes the creation of a one million message persistent E-mail collection. It discusses the four major components of a persistent archive system: support for ingestion, archival storage, information discovery, and presentation of the collection. The technology to support each of these processes is still rapidly evolving, and opportunities for further research are identified. 1. Collection Support, General Requirements Persistent archives can be characterized by two phases, the archiving of the collection, and the retrieval or instantiation of the collection onto new technology. The processes used to ingest a collection, transform it into an infrastructure independent form, and store the collection in an archive comprise the persistent storage steps of a persistent archive. The processes used to recreate the collection on new technology, optimize the database, and recreate the user interface comprise the retrieval steps of a persistent archive. The two phases form a cycle that can be used for migrating data collections onto new infrastructure as technology evolves. The technology changes can occur at the system-level where archive, file, compute and database software evolves, or at the information model level where formats, programming languages and practices change.
Moore et al. (Sat,) studied this question.