Information Technology Reference
In-Depth Information
Information or PDI kept within the Storage system. However it is important to
recognise that neither of these can be complete. For example the Representation
Information Network will change as, for example, the Knowledge Base of
the Designated Community changes. Similarly the Provenance information will
include not just the technical information about copying but also but also include
descriptions of various real-world entities (e.g. persons, organisations and their
attributes, roles and actions) whose social context is also associated with the data.
Therefore both Representation Information and PDI will have to include a pointer
out of the storage system.
•
The automatic maintenance of the
technical
provenance information, including
details of what are essentially internal events including copying, replication and
refreshment and the objects.
•
The policies which the archive imposes on the stored objects (and the
Representation Information, PDI etc associated with the encoded instances of
these policies), for example
◦
the number of backup copies, offsite and on-site, on-line and near-line, and
replication
◦
the access controls
◦
the distribution of information among the individual pieces of virtualised
storage
◦
maintenance of namespaces
◦
maintenance of collection level information
•
The ability to hand on the stored AIPs, and appropriate collection information,
to another OAIS system - either because of technological change or because of
organisational change as the preserved information is passed on to the next in the
chain of preservation.
The Digital Object Storage concept is intrinsically domain independent.
16.2.3 Ingest
The INGEST functional entity in the OAIS Reference Model provides
the services and functions to accept Submission Information Packages (SIPs)
from Producers (or from internal elements under the OAIS Administration
control) and prepare the contents for storage and management within the
archive. Ingest functions include receiving SIPs, performing quality assur-
ance on SIPs, generating an Archival Information Package (AIP) which
complies with the archive's data formatting and documentation standards,
extracting Descriptive Information from the AIPs for inclusion in the
archive database, and coordinating updates to Archival Storage and Data
Management.
