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Medium- to long-term preservation solutions
Technology preservation: preserving entire computer hardware platforms.
Migration: periodically transferring digital material from one hardware and software
configuration to another, or from one generation of computer technology to a
subsequent generation.
Emulation: using software that emulates obsolete encoding formats to provide access
to programs across different platforms.
Solutions, when it is too late
Digital archaeology: Applying different techniques to recover data that has already
become inaccessible due to damage to/degradation of media, poor management or
hardware/software obsolescence.
Emulation and Migration working papers
David Holdsworth and Paul Wheatley: Emulation, Preservation and Abstraction
<http://129.11.152.25/CAMiLEON/dh/ep5.html >
This paper argues that emulation is a valid method of digital preservation, both in terms of
longevity and affordability.This argument is bolstered by presenting guidelines for use of
emulation in this role, and by providing an illustrative and yet non-trivial example.
David Holdsworth: Emulation: C-ing ahead for digital longevity
<http://129.11.152.25/CAMiLEON/dh/cingahd.html >
It is proposed that a (the?) most cost-effective technique for implementing emulation for
long-term preservation is to use a widely available programming language for which there
are good prospects for long-term availability.There is the further suggestion that a subset of
the language be used to avoid those features that are unlikely to carry forward into
subsequent languages.The proposal is that the language to use for now is C.
Paul Wheatley: Migration a CAMiLEON discussion paper
<http://www.personal.leeds.ac.uk/~issprw/camileon/migration.htm>
This paper is intended to open the debate on the different uses of migration for the long-
term preservation of digital materials.This discussion will hopefully form the basis of future
comparisons between migration and emulation as part of the CAMiLEON project's
investigation of emulation as a digital preservation strategy.
Gregory W. Lawrence,William R. Kehoe, Oya Y. Rieger,William H.Waters,Anne R.
Kenney (2000): Risk Management of Digital Information:A File Format Investigation
<http://www.clir.org/pubs/reports/pub93/pub93.pdf>
This report is based on an investigation conducted by Cornell University Library to assess
the risks to digital file formats during migration.The study was carried out with support
from CLIR.The report includes a workbook that will help library staff identify potential
risks associated with migrating digital information. Each section of the workbook opens
with a brief issue summary; this is followed by questions that will guide users in completing
a risk assessment.The appendixes also include two case studies for migration: one for image
files and the other for numeric files.
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