"Reference Model for an Open Archival Information System (OAIS): Recommendation for Space Data System Standards," Consultative Committee for Space Data Systems (Abstract)

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The purpose of this document is to define the International Organization for Standardization (ISO) Reference Model for an Open Archival Information System (OAIS). An OAIS is an archive, consisting of an organization of people and systems, that has accepted the responsibility to preserve information and make it available for a Designated Community. It meets a set of such responsibilities as defined in this document ,and this allows an OAIS archive to be distinguished from other uses of the term "archive." The term "Open" in OAIS is used to imply that this Recommendation, as well as future related Recommendations and standards, are developed in open forums, and it does not imply that access to the archive is unrestricted.

The information being maintained has been deemed to need Long Term Preservation, even if the OAIS itself is not permanent. Long Term is long enough to be concerned with the impacts of changing technologies, including support for new media and data formats, or with a changing user community. Long Term may extend indefinitely. In this reference model there is a particular focus on digital information, both as the primary forms of information held and as supporting information for both digitally and physically archived materials. Therefore, the model accommodates information that is inherently non-digital (e.g., a physical sample), but the modeling and preservation of such information is not addressed in detail. This reference model:

- provides a framework for the understanding and increased awareness of archival concepts needed for Long Term digital information preservation and access;

- provides the concepts needed by non-archival organizations to be effective participants in the preservation process;

- provides a framework, including terminology and concepts, for describing and comparing architectures and operations of existing and future archives;

- provides a framework for describing and comparing different long term preservation strategies and techniques;

- provides a basis for comparing the data models of digital information preserved by archives and for discussing how data models and the underlying information may change over time;

- provides a foundation that may be expanded by other efforts to cover long-term preservation of information that is NOT in digital form (e.g., physical media and physical samples);

- expands consensus on the elements and processes for long-term digital information preservation and access, and promotes a larger market which vendors can support;

- guides the identification and production of OAIS-related standards.

The reference model addresses a full range of archival information preservation functions including ingest, archival storage, data management, access, and dissemination. It also addresses the migration of digital information to new media and forms, the data models used to represent the information, the role of software in information preservation, and the exchange of digital information among archives. It identifies both internal and external interfaces to the archive functions, and it identifies a number of high-level services at these interfaces. It provides various illustrative examples and some .best practice. recommendations. It defines a minimal set of responsibilities for an archive to be called an OAIS, and it also defines a maximal archive to provide a broad set of useful terms and concepts.

This document is a technical Recommendation for use in developing a broader consensus on what is required for an archive to provide permanent, or indefinite long-term, preservation of digital information. This Recommendation establishes a common framework of terms and concepts which comprise an Open Archival Information System (OAIS). It allows existing and future archives to be more meaningfully compared and contrasted. It provides a basis for further standardization within an archival context and it should promote greater vendor awareness of, and support of, archival requirements. Through the process of normal evolution, it is expected that expansion, deletion, or modification of this document may occur. This Recommendation is therefore subject to CCSDS document management and change control procedures which are defined in Procedures Manual for the Consultative Committee for Space Data Systems. Current versions of CCSDS documents are maintained at the CCSDS Web site: http://www.ccsds.org/

No later than five years from its date of issuance, this Recommendation will be reviewed by the CCSDS to determine whether it should: (1) remain in effect without change; (2) be changed to reflect the impact of new technologies, new requirements, or new directions; or, (3) be retired or canceled.

- "Reference Model for an Open Archival Information System (OAIS): Recommendation for Space Data System Standards," Consultative Committee for Space Data Systems, CCSDS 650.0-B-1 Blue Book, January 2002

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Post Date: March 20, 2005 at 7:55 AM CST; 1355 GMT