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Comment: Migrated to Confluence 4.0 - The repository shall have a definition of each AIP that is adequate for long-term preservation, enabling the identification and parsing of all the required components within that AIP.


For journal content, SP designed a single class of AIP to be adequate for long-term preservation. SP implements the AIP through a combination of files and databases, linked by uniform identifiers. To support the preservation needs of the repository, the AIP includes a number of components:

  • A Content Data Object in PDF format or another well known, widely accepted format that supports long-term preservation and migration
  • Representation Information - contains information on the CDO's file format, version, and a reference to its standard in a format registry
  • Packaging Information - SP's version of METS holds the Descriptive Information and the Preservation Description Information
  • Descriptive Information - SP normalizes the Provider's descriptive metadata and structural relationships to a version of the NLM Journal Archiving & Interchange Tag Set
  • Preservation Description Information
    • Reference Information - URIs and other identifiers are stored for each article in the associated metadata
    • Provenance Information - uses PREMIS vocabulary to record events in the life of the AIP, at both the file and article levels, and to manage Representation Information
    • Context Information - information on how a CDO relates to other CDOs or to other conceptual entities is found primarily in the descriptive metadata contributed by a provider. SP generates some context information as a part of the preservation metadata
    • Fixity Information - checksums generated at the time of ingest


Digital Preservation Policy Librarian

Relevant Documents

  1. Definitions of AIP
  2. Metadata Specifications