Transcript The Danish National Research Database.

The Danish National Research Database
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Which approach: Look at the environment first
and the software afterwards or vice versa?
Look at the environment – a hybrid environment
A hybrid environment calls for a hybrid solution
The solution:
• Distributed searching (Web-Z gateway)
• Hybrid model for data collection
Considerations
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Larger institutions/suppliers often have CRIS
systems of their own
Smaller institutions/suppliers often do not
The architecture must be integrated with other
national initiatives
Data feed should to the utmost extent be the
reporting that is already done at the institutions
Do NOT force present suppliers to change
routines unless they want to!
Data collection and searching
Data collection:
• Metadata creator/cataloguing module
• Load routines like the present
• Harvesting service (Open Archives Initiative)
Searching:
• Access to the present database as well as other
databases using Z39.50
• The Danish National Research Database
becomes a virtual database – a portal
The Danish National Research Database
System Architecture
Users
Users
HTTP
The national system
Other
Z-gateways
- local or
(inter)national
Legal deposit
OAI harvesting
The Danish National Research
Database
Z39.50
Z39.50
(Z39.50-gateway
withZ39.50
possible value adding)
Z39.50
HTTP
OAI server
Z39.50 server
RDB
Central database
Import
Local
systems
HTTP
or FTP
Cataloguemodule
HTTP
Export
a
= Part of national system
= Part of local system
2001-04-24
HTTP
OAI server
Local
database
Cataloguemodule
Data feed
OAI
Harvesting
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HTTP
Z39.50
OAI server
Z39 server
Local
database
Cataloguemodule
Local
database
Cataloguemodule
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d
Z39.50
Z39 server
Local
database
Cataloguemodule
e
a. Cataloguing in local system, export on a regular basis to national system
b. Cataloguing directly in the national system.
c. Cataloguing in local system with OAI server, data
collected by the national system - OAI harvester robot
d. Cataloguing in local installation of the national system. Data are made available
using Z39.50 server (and/or OAI server)
e. Cataloguing in local system. Data are made available using the institutions own
Key elements in the architecture
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Data collection – metadata creator
Data collection – harvester (OAI)
Data collection – present load routine
RDB and search engine
Distributed searching – Z39.50 protocol
Organization:
• Denmarks Electronic Research Library
• Project management: Risoe National
Laboratory
• The development project 2000 – 2002? A
collaboration between The Technical University
of Denmark and Risoe National Laboratory
ERGO – if it is still there…
• Data delivery could be by offering access
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- not necessarily physical deliveries
Data collection by means of
upload/harvesting – or no collection at all
(distributed searching)
ERGO web site becomes a web-Z
gateway - a portal
ERGO nodes thus acting as targets for
harvest or Z39.50 protocol
ERGO elements
• Z39.50 gateway (web-Z gateway)
• Search engine(s)
• Metadata creator
• Harvester (Open Archives Initiative?)
• Solutions based primarily on open
source/freeware. Software configured,
maintained and distributed by Cordis
team
Links
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Denmarks Electronic Research Library:
www.deflink.dk (presently being redesigned)
The DEF web-Z gateway:
www.defkat.dk
The Danish National Research Database:
www.forskningsdatabase.dk
Open Archives Initiative:
www.openarchives.org