Information Technology Reference
In-Depth Information
resolver system host has lapsed and the database system which was used is not
available. A more permanent persistent identifier system is needed which itself
has the appropriate longevity with committed long-term financial and social
support.
24.6.5.1 Next Steps
Review the existing persistent identifier systems and their technical, organisation
and social underpinnings with respect to longevity and scalability
Develop or adopt a sufficiently scalable/maintainable identifier system
Investigate potential organisational underpinnings and the links to, for example,
the EU or USA.
24.6.5.2 Final Destination
An identifier system for locating and cross-referencing digital objects which has
adequate organisational, financial and social backing for the very long termwhich
can be used with confidence
24.6.5.3 Relevant Projects Policies, Organisations, Activities:
DOI ( http://www.doi.org/ ), DNS (Domain Name System), CASPAR ( http://
www.casparpreserves.eu/ ), URN (Uniform Resource Name), nestor catalogue
of criteria for trusted PI-systems ( http://www.langzeitarchivierung.de/ ), XRI
(Extensible Resource Identifier), DPE ( http://www.digitalpreservationeurope.
eu/ )
24.6.6 Transfer of Custody and Brokering Services
Brokering of organisations to hold data and the ability to package together the infor-
mation needed to transfer information between organisations ready for long term
preservation:
Projects and organisations can and do run out of funding for preserving digital
holdings, for example projects from Earth Observation (EO) projects are often only
funded for 10 years after the closure of the satellite from which the data is derived.
There are in the EO case some more or less formal mechanisms for finding a host
who could take over responsibility. A brokering/orchestration system is needed to
formalise the finding of new hosts.
However even if agreement is reached there is the issue of collecting all the
information related to a set of digital objects held, perhaps in a variety of systems,
by the original host, and transferring this to the new host, itself with a variety of
systems.
 
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