Herbert Van de Sompel Research Library, Los Alamos National Laboratory OAI4, October 20-22 2005, CERN, Geneva, Switzerland RESEARCH LIBRARY Lessons in Cross-Repository Interoperability learned from the aDORe effort Herbert Van de Sompel Research Library Los Alamos National Laboratory, USA
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Herbert Van de Sompel Research Library, Los Alamos National Laboratory OAI4, October 20-22 2005, CERN, Geneva, Switzerland RESEARCH LIBRARY Lessons in.
Herbert Van de Sompel Research Library, Los Alamos National Laboratory OAI4, October , CERN, Geneva, Switzerland RESEARCH LIBRARY Credits The reported material is based on the following work: o The LANL aDORe repository effort o The upcoming PhD thesis by Jeroen Bekaert (Advisor Herbert Van de Sompel) regarding protocol-based interfaces for Open Archival Information Systems (OAIS) o The NSF-funded Pathways project in collaboration with the Information Science group at Cornell University (Carl Lagoze, Sandy Payette, Simeon Warner)
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Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
Lessons in Cross-Repository Interoperabilitylearned from
the aDORe effort
Herbert Van de SompelResearch Library
Los Alamos National Laboratory, USA
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
The repository model
"Pattern Recognition: The 2003 OCLC Environmental Scan"http://www.oclc.org/membership/escan/toc.htm
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
Credits
The reported material is based on the following work:o The LANL aDORe repository efforto The upcoming PhD thesis by Jeroen Bekaert (Advisor
Herbert Van de Sompel) regarding protocol-based interfaces for Open Archival Information Systems (OAIS)
o The NSF-funded Pathways project in collaboration with the Information Science group at Cornell University (Carl Lagoze, Sandy Payette, Simeon Warner)
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
Outline
aDOReA few words about the aDORe architecture
A Federation of RepositoriesA new level of cross-repository interoperability
Pathways InterDisseminatorA context-sensitive service overlay for a federation of repositories
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
aDORe effort
aDORe is 2 things:o Standards-based, modular repository architecture
- Distributed architecture- Protocol-based interactions between modules- Applicable to create interoperable federations of
heterogeneous repositorieso Actual implementation of the architecture at LANL for
local storage of digital assets (currently in its 2nd version)
aDORe is not a producto Components of aDORe software, usable in other
environments, will be released
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
aDORe effort
• Standards used in aDORe include: o XML, o XML Schema, o MPEG-21 Digital Item Declaration, o MPEG-21 Digital Item Identification, o W3C XML Signatures,o OAI-PMH, o NISO OpenURL Framework for Context-Sensitive Services, o Internet Archive ARC file format, o OAIS concepts
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
OAI-PMH Federator & OpenURL Resolver
aDORe front-end
Interfacestandard identifier
OAIS AccessType
# items in
responseOAI-PMHFederator OAI-PMH Package Identifier OAIS DIP 1 or more
OpenURLResolver
NISOOpenURL
Content Identifier, Package Identifier (with XML ID
fragment)OAIS DIP &Result Set 1
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
aDORe effort
Standards
Distributedarchitecture
Protocol-basedcommunication
Insightsin
Cross-RepositoryInteroperability
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
Outline
aDOReA few words about the aDORe architecture
A Federation of RepositoriesA new level of cross-repository interoperability
Pathways InterDisseminatorA context-sensitive service overlay for a federation of repositories
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
The interoperable repository model
I will try to show that:• a significantly higher level of cross-repository interoperability can be achieved with relatively modest means• those means are largely available and agreed upon in our community
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
Part 1 : Requirements for a repository in a federation
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
Repositories & Units of Communication
• Data-oriented research => not only textual materials, but also datasets,
for each AIP (version)BaseURL(OpenURL_CIID)?url_ver=Z39.88-2004&rft_id=ContentInfoIdentifier&rft_val_fmt=info:ofi/fmt:kev:mtx:pathways &rft.aip=AIPIdentifier&svc_id=info:pathways/svc/dip
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY
• There can be many of these engines in a federation. The result is the ability to provide context-sensitive disseminations of DOs in (a federation of) repositories.
Pathways InterDisseminator Service Overlay
Herbert Van de SompelResearch Library, Los Alamos National Laboratory
OAI4, October 20-22 2005, CERN, Geneva, SwitzerlandRESEARCHLIBRARY