1. Long-term Preservation as a Relay Greg Janée University of California at Santa Barbara

2. NDIIPP partners meeting 2007-06-272 Typical preservation effort recent content now take action now + 100 years

3. NDIIPP partners meeting 2007-06-273 Ein Gedankenexperiment old content now - 50now + 50now take action content ancient content “mid-century perspective”

4. NDIIPP partners meeting 2007-06-274 Mid-century perspective Repeated migrations across storage media and storage systems –past and future Repeated migrations across archive systems –each possibly necessitating transformation and reorganization of archived content Repeated handoffs between institutions –each implementing different policies

5. NDIIPP partners meeting 2007-06-275 Time T 0 Archival objects over time usable unusable

6. NDIIPP partners meeting 2007-06-276 increasing obsolescence T 0 + 10 years

7. NDIIPP partners meeting 2007-06-277 total obsolescence T 0 + 20 years

8. NDIIPP partners meeting 2007-06-278 new derivative T 0 + 20 years

9. NDIIPP partners meeting 2007-06-279 repeated obsolescence T 0 + 30 years

10. NDIIPP partners meeting 2007-06-2710 repeated migration T 0 + 40 years

11. NDIIPP partners meeting 2007-06-2711 T 0 + 50 years

12. NDIIPP partners meeting 2007-06-2712 Information value, resource availability vary over time Need Shirky’s “option to do nothing” Need a representation of archival objects that is ultra-low-cost, resurrectable Equivalent of cardboard box in the basement Mummification archive handoff mummified form embalm resurrect

13. NDIIPP partners meeting 2007-06-2713 Questions How can we facilitate handoffs? How can we facilitate mummification? –particularly in cases of archive failure? How can we make resurrection possible? –will always be hard archive handoff mummified form embalm resurrect

14. NDIIPP partners meeting 2007-06-2714 Handoff architecture archive OAIS exportingest archive logical data model physical data model storage virtualization layer logical data model physical data model interop best practices

15. NDIIPP partners meeting 2007-06-2715 Logical data model must capture all information required to resurrect, reuse objects Must include archival of format specs, metadata, contextual information, transitive closure of dependencies Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

16. NDIIPP partners meeting 2007-06-2716 Physical data model must fully and simply represent logical data model No vendor lock-in Suggestion: files, filesystems, manifests Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

17. NDIIPP partners meeting 2007-06-2717 Storage virtualization layer supports intra- and inter-archive handoffs Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

18. NDIIPP partners meeting 2007-06-2718 Combination of complete resurrection information with a simple physical representation means… Mummification is a NO-OP Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

19. NDIIPP partners meeting 2007-06-2719 Format registries Archives reference registries Registries must capture, archive format specifications Must represent formats as archival objects Offer transitive extraction service archive format registry reference extract

20. NDIIPP partners meeting 2007-06-2720 Discussion topics Characterization of ingest vs. handoff Filesystem-like representation for mummification? Standardization of logical, physical data models possible?