The document provides an overview of the Reference Model for an Open Archival Information System (OAIS): - It describes the background and development of the OAIS model by CCSDS and its adoption as an ISO standard. - Key concepts of the OAIS model are explained, including definitions of information objects, packages and the functional model comprising ingest, archival storage, data management, administration, preservation planning and access functions. - The document outlines the OAIS model's influence in areas like compliance for trusted digital repositories, analysis and comparison of repositories, and informing repository system design.

1. The Reference Model for an Open Archival Information System (OAIS) Michael Day Digital Curation Centre UKOLN, University of Bath http://www.ukoln.ac.uk/

11. OAIS Functional Model (2) OAIS Functional Entities (Figure 4-1)

13. Functions of Archival Storage

15. Preservation Planning Functions

18. OAIS Information Objects (2) OAIS Information Object (Figure 4-10) Information Object Representation Information 1+ interpreted using 1+ Data Object interpreted using Physical Object Digital Object Bit Sequence 1+

20. OAIS Information Objects (4) OAIS Representation Information Object (Figure 4-11)

23. OAIS Information Packages (3) Preservation Description Information Reference Information Provenance Information Context Information Fixity Information PDI Preservation Description Information (Figure 4-16)

25. OAIS Information Packages (5)

28. Implementing the OAIS model

31. Conformance and certification

38. The analysis and comparison of repositories

42. BADC/APS case study (3)

47. Informing system design

52. Preservation metadata

54. Conclusions