CYCLADES An Open Collaborative Virtual Archive Environment Umberto

CYCLADES An Open Collaborative Virtual Archive Environment Umberto Straccia straccia@iei. pi. cnr. it IEI-CNR (Italy) February, 2001 1

Outline l Project Overview l Project Activities and Responsibility l Project Schedule February, 2001 2

Project Overview February, 2001 3

(Preliminary: the scenario) Search & Browse Information sources User DIGITAL ARCHIVE 1 Communities/Groups of users DIGITAL ARCHIVE 2 DIGITAL ARCHIVE n Large, heterogeneous, multidisciplinary digital archives distributed over the Web February, 2001 4

Project Goal Development of an open collaborative virtual archive environment supporting Individual users l Communities/Groups of users l interacting with l Large, heterogeneous, multidisciplinary digital archives distributed over the Web February, 2001 5

Logical View Communities/Groups of users User CYCLADES Virtual Archive Environment DIGITAL ARCHIVE 1 DIGITAL ARCHIVE 2 . . . DIGITAL ARCHIVE n Large, heterogeneous, multidisciplinary digital archives distributed over the Web February, 2001 6

CYCLADES l The Digital Archives l CYCLADES functionality l CYCLADES architecture February, 2001 7

The Digital Archives l CYCLADES will provide access to the Digital Archives compliant with the Open Archive Initiative February, 2001 8

the Open Archives Initiative l Agreement between several Digital Archives in order to provide interoperability l The specs give data providers (individual archives) easy-toimplement mechanisms for making the documents’ metadata in their archives externally available l This external availability then makes it possible for service providers to build higher levels of functionality FOR MORE INFO. . . http: //www. openarchives. org February, 2001 9

OAI: list of some compliant data providers Archive. ID Description ar. Xiv clinmed CSTC physics, mathematics, non-linear systems and computer science Clinical Medicine and Health Research Netprints Computer Science Teaching Center Digital library of peer-reviewed teaching resources for computer science educators HUBerlin NACA Humboldt University at Berlin/Germany Document Server NACA Technical Report Server Scanned reports of the National Advisory Committee for Aeronautics (1917 -1958); the predecessor organisation to NASA. NCSTRL NDLTD WCR Networked Computer Science Technical Reference Library Networked Digital Library of Theses and Dissertations Web Characterisation Repository database of meta-information relating to trace files, tools and publications that are relevant to characterisation of the World Wide Web February, 2001 10

OAI specs: some functionality List Identifiers l List Records l Get Record – Example l http: //ar. Xiv. org/oai 1? verb=Get. Record&metadata. Prefix=oai_d c&identifier=oai: ar. Xiv: cond-mat/0006408 February, 2001 11

Header: Identifier : oai: ar. Xiv: cond-mat/0006408 Datestamp : 2001 -01 -31 Metadata: oai_dc: title: Charge-ordering phase transition and order-disorder effects in the Raman spectra of Na. V 2 O 5 creator: Konstantinovic, M. J. creator: Isobe, M. creator: Ueda, Y. subject: Strongly Correlated Electrons; Disordered Systems and Neural Networks description: In the ac polarized Raman spectra of Na. V 2 O 5 we have found anomalous phonon broadening, and an energy shift of the low-frequency mode as a function of the temperature. These effects are related to the breaking of translational symmetry, caused by electrical disorder that originates from the fluctuating nature of the V {4. 5+} valence state of vanadium. The structural correlation length, obtained from comparisons between the measured and calculated Raman scattering spectra, diverges at T< 5 K, indicating the existence of the long-range charge order at very low temperatures, probably at T=0 K. date: 2000 -06 -26 type: e-print identifier: http: //ar. Xiv. org/abs/cond-mat/0006408 February, 2001 12

CYCLADES: as a service provider CYCLADES Virtual Archive Environment Common Interface Archive 1 Common Interface Archive 2 OAI Archives. . . service provider Common Interface data providers Archive. N Large, heterogeneous, multidisciplinary digital archives February, 2001 13

Functional View Communities/Groups of users User Search&Browse Personalization Collaboration Recommendation Virtual Collection DIGITAL ARCHIVE 1 DIGITAL ARCHIVE 2 . . . CYCLADES Virtual Archive Environment DIGITAL ARCHIVE n Large, heterogeneous, multidisciplinary digital archives February, 2001 14

Virtual Collections (roughly) l Virtual Collection: a set of metadata records collected together, according to some criteria, from the archives + set of functionality over records Virtual Collection VC 2 VC 1 VC 3 Exported data Common Interface Archive 1 February, 2001 Common Interface Archive 2 OAI Archives Common Interface Archive. N 15

Search & Browse (roughly) l Search: typical Search using the virtual collection’s search fields (e. g. author, title, abstract) l Query formulation through browsing Search Virtual. Collection = “Logic”, Author = “Straccia”, Abstract = “Fuzzy Logic” February, 2001 Browse Schema Attribute Author Castelli Straccia Abstract Thanos Title. . . 16

Personalization (roughly) Umberto’s folder Digital Libraries Logics for Uncertainity and Imprecision Information Retieval Fuzzy Logic Possibilistic Logic Probabilistic Logic User topics of interest maybe managed similarly to e-mail folders l Service learns the user information needs automatically l New data is classified into the right topic folder automatically l February, 2001 17

Collaboration (roughly) l A shared working space can be created by groups referencing: – user documents – a virtual archive – recommendations, related links, annotations, ratings, … Based on BSCW (Basic Support for Cooperative Work) VC To be read Very interisting doc http: //infohunter. iei. pi. cnr. it February, 2001 Shared working space 18

Recommendation (roughly) l The user is automatically notified about new data that the system judges relevant User prefs + February, 2001 Group prefs = Recommendation 19

CYCLADES: Architecture (starting point) l Modular – Basic functionality are allocated on servers l Distributed – Servers maybe over the Web l Open – new services can easily be added February, 2001 20

Users Cyclades Mediator Service Recommendation Service Query & Browse Service Personalization Service Collaborative Work Service EU Side Collection Service Access Service Common Interface Archive 1 February, 2001 Common Interface Archive 2 OAI Archives Common Interface Archive. N US Side 21

Project Activities and Responsibilities February, 2001 22

February, 2001 23

Project Schedule February, 2001 24

1. 2. 2001 - 31. 7. 2001 February, 2001 1. 2. 2001 - 31. 7. 2003 25