1. A Tour of the OAIS Reference Model Brian Lavoie Research Scientist Office of Research OCLC Museum Computer Network Annual Conference September 2002

2. Roadmap OAIS is the answer! … whats the question??? A whirlwind tour of the OAIS reference model From conceptualization to implementation …

3. Before OAIS … Growing awareness of digital preservation as both an imperative and a challenge Recognition that digital preservation impacts multiple domains: – Libraries, museums, government agencies, private sector Yes, lots of domain-specific issues, but also issues that transcend domains … – Shared issues, challenges – Common ground for cross-domain dialog/collaboration

4. Gathering the Strands … NASA: Consultative Committee for Space Data Systems Develop ISO archive standards for long-term storage of digital data Engage the digital preservation community at large First step: Develop framework to extend the concepts and issues of digital preservation to as broad a community as possible

5. Open Archival Information System Reference Model Open: developed/released in a public forum Archival Information System: Organization of people and systems that has accepted the responsibility to preserve information and make it available for a Designated Community Reference Model: high-level description of an OAISs: – Environment – Functional model – Information model – NOT AN IMPLEMENTATION! January 2002: APPROVED – ISO standard 14721:2002

6. OAIS Environment OAIS(Archive)OAIS(Archive) ManagementManagement ProducerProducerConsumerConsumerDesignatedCommunityDesignatedCommunity OAIS(Archive)OAIS(Archive) DesignatedCommunityDesignatedCommunity

7. Open Archival Information System Two primary functions: – Preserve information – Make it available for a Designated Community Functional Model: six components Ingest Archival Storage Access Preservation Planning Data Management Administration

8. OAIS Information Model Information Package: Conceptual structure for information as it moves into, through, and out of the archival system Digital object and its associated metadata, bound into a single logical package Three Types: – Submission Information Package (SIP) – Archival Information Package (AIP) – Dissemination Information Package (DIP)

9. Packaging Information Content Information Inside the Archival Information Package … Content Data Object Representation Information Preservation Description Information Provenance Fixity Context Reference Descriptive Information

10. Moving Forward … Repository Architectures: OAIS-compliant OAIS-Related Standards Domain-Specific Implementations Preservation Metadata Encoding and Exchange: (METS)

11. For More Information … OAIS Reference Model: http://ssdoo.gsfc.nasa.gov/nost/isoas/us/overview.html Producer-Archive Interface Standard: http://ssdoo.gsfc.nasa.gov/nost/isoas/CCSDS-651.0-W-1.pdf Attributes Working Group: http://www.rlg.org/longterm/attribswg.html Preservation Metadata Working Group: http://www.oclc.org/research/pmwg/ METS: http://www.loc.gov/standards/mets/