The Stanford Archival Vault (SAV) in Stanford University
assigns a numerical handle to every digital "object" (record)
in a repository.
The handle is the clever numerical result of a mathematical
formula whose input is the number of information bits in the
original object being deposited. This allows to track and
uniquely identify records across multiple repositories. It
also prevents tampering. SAV also offers application layers.
These allow programmers to develop digital archive software
and permit users to change the "view" (the interface) of an
archive and thus to mine data. Its "reliability layer"
verifies the completeness and accuracy of digital
repositories.
The Internet Archive, a leading digital depository, in its own
words:
"...is working to prevent the Internet -- a new medium with
major historical significance -- and other "born-digital"
materials from disappearing into the past. Collaborating with
institutions including the Library of Congress and the
Smithsonian, we are working to permanently preserve a record
of public material.
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