1. Distributing a large electronic journal collection - Indexing and Caching Anders Ardö, DTV Jochen Hollmann, Chalmers Per Stenström, Chalmers

2. A. Ardø: Architecture of DADSNORDUNET 2000 Agenda Background (Anders Ardö): The architecture of DADS - a digital library of scientific journals Project description (Jochen Hollmann): Making DADS distributed - a NORDUNET2 project

3. The Architecture of DADS a digital library of scientific journals Technical Knowledge Center of Denmark Anders Ardø Head of Development and@dtv.dk Anders Ardø Head of Development and@dtv.dk NORDUNET 2000, Helsinki.

4. A. Ardø: Architecture of DADSNORDUNET 2000 Technical Knowledge Center DTV - a knowledge center with 3 facets: –University and national technical library –Research evaluation and promotion center –Knowledge technology center: research projects systems development systems operation consultancy and training DTV Development Laboratory

5. A. Ardø: Architecture of DADSNORDUNET 2000 Digital Article Database Service DADS key features –Single point of access - under local control single user interface / single search regardless of publisher / producer –Critical mass of content integrating primary and secondary –Single mode of full text requesting for electronic as well as printed –Distributed and collaborative architecture A quick look...

6. A. Ardø: Architecture of DADSNORDUNET 2000

7. A. Ardø: Architecture of DADSNORDUNET 2000

8. A. Ardø: Architecture of DADSNORDUNET 2000

9. A. Ardø: Architecture of DADSNORDUNET 2000

10. A. Ardø: Architecture of DADSNORDUNET 2000

11. A. Ardø: Architecture of DADSNORDUNET 2000

12. A. Ardø: Architecture of DADSNORDUNET 2000 DADS key figures Currently ~ 15 million bibliographical records/abstracts (including INSPEC and Compendex) –10-15% of these have links to e-fulltext, local or remote –paper-based library document delivery services are offered for the rest ~ 1 terrabyte of locally stored data (including all of Elseviers fulltext) Now gradually expanding from STM to Social Sciences and Humanities

13. A. Ardø: Architecture of DADSNORDUNET 2000 The System behind DADS General system overview Publishers & Database producers Publishers & Database producers Publishers & Database producers Consortium-Wide Database Services Information producers Campus Services User Access Gateway Local (library) system User Access Gateway Local (library) system User Access Gateway USER Local (library) system Data Loading & Management System Bibliographic Databases & Full Text Repositories Data Directories & Rights Management Core System

14. A. Ardø: Architecture of DADSNORDUNET 2000

15. A. Ardø: Architecture of DADSNORDUNET 2000 Project description Making DADS distributed a Nordunet2 project