Information Technology Reference
In-Depth Information
Fig. 16.2
OAIS functional model
that the concept embodies the holding (in the Repository) of a significant amount of
digital information - the Representation Information - rather than simply pointers
to external resources.
The prime functions of a Registry/Repository are:
•
Given an identifier of a piece of Representation Information (RepInfo), return
that piece of Representation Information to the requestor. This Representation
Information will in general be an opaque binary object as far as the Registry/
Repository is concerned.
•
Allow searching of the holdings of the Registry in order to enable the re-use of
existing RepInfo.
◦
To facilitate this searching, each piece of RepInfo should be classified under
one or more Classification Schemes, and have a searchable text description of
the RepInfo.
•
Each piece of RepInfo should itself have a pointer to its own RepInfo, and also
details of its PDI.
•
The Registry/Repository should itself be an OAIS which can be certified for long-
term preservation of information.
The Registry/Repository functionality is domain independent because pieces
of the Representation Information are, as far as the Registry/Repository is
concerned, opaque binary objects.
