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Long-term preservation of DD Long-term preservation of DD (LTPoDD)(LTPoDD)Long-term preservation: Long-term preservation:
Anglo-American resources: digital preservation, (long-term) preservation of digital objects or digital curation
The importance of the digital preservation may be corroborated by a Rothenberg’s famous saying: “the digital information lasts forever or five years, whichever comes first”
OAIS reference modelOAIS reference model
conceptual, terminological conceptual, terminological framework:framework:
Open Archival Information System Reference ModelISO 14721:2003model –> it is possible to adapt the repository to the specific needs and challengesprerequisite to a trustworthy repository“an archive, consisting of an organization of people and systems that has accepted the responsibility to preserve information and make it available for a designated community [...] and for long enough to be concerned with the impacts of changing technologies, including support for new media and data formats, or with a changing user community” .
modules:modules:
producer – individual vs. organizational
SIP (submission information package)
ingest = import (single vs. bulk)
data management archival storage AIP (archival information
package) administration access DIP (dissemination information
package) preservation planning
State-of-the-ArtState-of-the-Art
JISC survey :JISC survey :
March 2009
SW: CONTENTdm, Digital Commons , DigiTool, DSpace, Eprints, EQUELLA, Fedora, intraLibrary, Open Repository, VITAL, Zentity
study: functionalities of today’s available open-source and commercial systems is very even
how about DODD?
Criteria:Criteria:
supported formats thumbnails user interface functions advance search browsing classification/subject
headings user authentication statistics SW platforms, OS,
scripting languages metadata interoperability
Repository Software Survey [online]. JISC RepositoryNet, March 2009 [cit. 2009-04-05]. Available at: <http://www.rsp.ac.uk/software/surveyresults>.
Comparison & resultsComparison & results
CriteriaCriteria::
OAIS model implementation
a wide range of supported formats
open architecture for other applications and plug-ins
internal tools for format change (e.g. emulation, migration)
SW and/or HW (in)dependence
administrator’s functions services
Repositories:Repositories:
open-source SW: DSpace, Fedora,
EPrints and Research-Output Repository Platform
commercial SW: CONTENTdm,
Digital Commons, Digitool, Equella, intraLibrary, Open Repository, Vital
three relatively “new” systems:
Dias, SDB, Rosetta
Comparison & results #2Comparison & results #2
OAIS model implementation
a wide range of supported formats
open architecture for other applications and plug-ins
internal tools for format change (e.g. emulation, migration)
SW and/or HW (in)dependence
administrator’s functions services
Repozitáře:Repozitáře:
open-source SW: Fedora OAIS model
implementation, METS, not PREMIS, open standard, OS, HW independence; dependence on PC – Midrange server, SIP as a “compound digital object”, nonexistence of migration and emulation tools, indexing for full-text search
not known: limited number of DD, limits for (a bulk) ingest, ingest scheduler, versioning of digital documents, statistics, support in CZ
Comparison & results #3Comparison & results #3
OAIS model implementation
a wide range of supported formats
open architecture for other applications and plug-ins
internal tools for format change (e.g. emulation, migration)
SW and/or HW (in)dependence
administrator’s functions services
RepositoriesRepositories
commercial SW: IBM DIAS system is named in many
ways(implemented according to the needs of an institution), not much information, missing METS, PREMIS, not an open standard, OS, SW platforms dependence; SIP as a stream package (not more than 5 thousand files in one SIP), no ingest scheduler, missing ingest scheduler, web archiving, support in CZ
not known: OAIS, HW dependence questionable, limits for (a bulk) ingest, statistics
Comparison & results #4Comparison & results #4
OAIS model implementation
a wide range of supported formats
open architecture for other applications and plug-ins
internal tools for format change (e.g. emulation, migration)
SW and/or HW (in)dependence
administrator’s functions services
Repositories:Repositories:
commercial SW: Tessella SDB OAIS support, METS
(possible to export), PREMIS, open standard, OS, SW, HW platform independence; SIP as a logical entity, versioning of digital objects, ingest scheduler, web archiving, statistics, indexing for full-text search, browsing, support in CZ, no limit for (a bulk) ingest
Comparison & results #5Comparison & results #5
OAIS model implementation
a wide range of supported formats
open architecture for other applications and plug-ins
internal tools for format change (e.g. emulation, migration)
SW and/or HW (in)dependence
administrator’s functions services
Repositories:Repositories:
commercial SW: Ex Libris Rosetta OAIS support, METS
(possible to export), PREMIS, open standard, OS, SW, HW platform independence; SIP as a logical entity, versioning of digital objects, ingest scheduler, web archiving, statistics, indexing for full-text search, browsing, support in CZ, no limit for (a bulk) ingest
ConclusionsConclusions
Reality check:Reality check:
theoretical comparison (based on search in presentations, articles, papers on the Internet) is very complicated and partially misrepresenting
there will be at least one SW solution perfectly suitable for the LTPoDD open-source and commercial
YES and NO
not a single repository complies to the chosen criteria YES
open source solution - better performance of open source systems because of a widespread developer and user community NO
PostulatesPostulates::
there will be at least one SW solution perfectly suitable for the LTPoDD
open-source and commercial
not a single repository complies to the chosen criteriaopen source solution - better performance of open source systems because of a widespread developer and user community
Reasons: LTPoDD is still in its infancy, SW is not a redemption!
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