Workbook on Digital Private Papers > Introduction > Introduction to OAIS
Introduction to OAIS
Overview of the OAIS model: Functional model (OAIS 4)
OAIS provides a functional model, which includes information about the kinds of activities undertaken by each function. The seven functions outlined by OAIS are:
- Ingest.
- Archival Storage.
- Data Management.
- Administration.
- Access.
- Preservation Planning.
- Common Services.
A useful diagram of the seven OAIS functions and the transition from SIP to AIP to DIP is given below:
Most of these functions will make sense to an archivist or information professional. Ingest is roughly the same as the traditional archival processes undertaken when an archive is newly accessioned and before it is added to the main collection. In the paper world this would involve checking for mould, insects and physical degradation as opposed to the digital equivalent of worms, viruses and bitrot. The meaning of Common Services may also require some explanation: these are the essential services required by any IT system, such as the timely application of security patches.
