<Li> Archival Storage function: stores, maintains, and retrieves AIPs . It accepts AIPs submitted from the Ingest function, assigns them to long term storage, migrates AIPs as needed, checks for errors, and provides requested AIPs to the Access function </Li> <Li> Data Management function: coordinates the Descriptive Information of the AIPs and the system information that supports the archive . It maintains the database that contains the archive's information by executing query requests and generating results; generates reports in support of other functions; and updates the database . </Li> <Li> Administration function: manages the daily operations of the archive . This function attains submission agreements from information producers, performs system engineering, audits SIPs to ensure compliance with submission agreements, develops policies and standards . It handles customer service and acts as the interface between Management and the Designated Community in the OAIS environment . </Li> <Li> Preservation Planning function: supports all tasks to keep the archive material accessible and understandable over long terms even if the original computing system becomes obsolete, e.g. development of detailed preservation / migration plans, technology watch, evaluation and risk analysis of content and recommendation of update and migration . </Li>

Reference model for an open archival information system (oais)