Robin Dale RLG Robin.Dale@notes.rlg.org OAIS Functionality Robin Dale RLG Robin.Dale@notes.rlg.org

Questions to be Answered (1 of 2) What is OAIS functionality? What are the functional entities of the OAIS reference model? What does the reference model mean by ingest, archival storage, data management, administration, access, and preservation planning? What are the characteristics of these functional entities

Questions to be Answered (2 of 2) What role does each entity play in an archival information system? What relationships are inherent in the model? How is OAIS functionality similar to the functionality of a digital library or electronic records system? Functionality caveats

OAIS Functional Model

Ingest Functionality Receive/accept submission information packages (SIPs) On media, via FTP Perform quality assurance on SIPs Checksums, system log files to catch read/write errors Generate Archival Information Packages (AIPs) To archive’s data formatting and documentation stds. Extract descriptive information for data management To support search and retrieval of AIPs Coordinates updates to Archival Storage and Data Management Transfers the AIPs and metadata to appropriate places

Ingest, continued

Archival Storage Functionality Receives Archival Information Packages (AIPs) from Ingest Adds to permanent storage Manages storage hierarchy Refreshes/replaces media Performs error checking Provides disaster recovery capabilities Duplication of contents for off-site storage Provides AIPs to Access

Archival Storage, continued

Data Management Functionality Administers archive database functions Maintaining schema, view definitions, referential integrity Receives/performs database updates New descriptive information or archive administration data Performs queries Produces reports Ex.: summary of holdings, usage reports, etc.

Data Management, continued

Administration Functionality Solicits/negotiates submission agreements Audits SIPs to ensure they meet standards Manages systems configurations (hardware and software) Monitors systems operations Inventories, reports, updates Establishes and maintains archive standards and policies Provides customer support Activates requests

Administration, continued

Preservation Planning Functionality Evaluates contents of archive; periodically recommends updates to migrate current holdings Develops recommendations for archive standards and policies Monitors changes in technology environment, users’ service requests, and knowledge base Designs information package templates Develops detailed migration plans, software prototypes and test plans to assist Administration

Preservation Planning, continued

Access Functionality Receives requests from users (consumers) Applies controls to limit access as needed Coordinates requests and execution of requests Generates dissemination information packages (DIPs) Delivers DIPs to users (consumers)

Access, continued

Common Services Operating system services Network services File access, reliable transmission, support Security services Identification/authentication, data integrity, access control, data confidentiality

Relationships, data flow

OAIS & Digital Library Systems OAIS functionality - bundled in entities such as Ingest, Data Management, and Access – overlaps the general functionality of a digital library system Submission (acquisition) Descriptive information (cataloging) Authorization/authentication and access control (of users), and Access provisions (as that possible through library/institutional web site) Had examples, but will let Deborah Woodyard and David Giaretta discuss this in depth in their section. Don’t want to spoil their talks by giving too many examples.

Functionality Reminders. . . It is a conceptual reference model and not a system design model Functions as set forth in OAIS Reference Model may not necessarily correspond with functional modules of a system that would implement the model. (Your mileage may vary!) Functionality of an actual digital repository (or within modules of the repository) may be much more limited than in the OAIS Reference Model