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Portalmania!

Thematic Web Portals: the case of Science and Technology Museums Vassilis Christophides Dimitris Plexousakis {christop, dp}@ics.forth.gr Institute for Computer Science - FORTH Heraklion, Crete. Portalmania!. Internet Portals.

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Portalmania!

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  1. Thematic Web Portals: the case of Science and Technology MuseumsVassilis Christophides Dimitris Plexousakis{christop, dp}@ics.forth.grInstitute for Computer Science - FORTHHeraklion, Crete

  2. Portalmania!

  3. Internet Portals • Gateways to resources on the WWW with the aim of making information research simpler and more effective • Serve communities of usersbyproviding • Access to a broad spectrum of information and services (horizontal portals) • Access to information and services on specific subject matters (vertical or thematic portals) • Personalization in information retrieval • user interests • information filtering (viewpoints) • customizable information presentation • location-specific information • information “push” channels

  4. Elements of Comparison

  5. Workplace Education C-Web Commerce Health What is a Community Web ? • A group of people sharing a domain of discourse and a set of information resources (e.g.,data, documents, services) and having some common interests • Commerce, Education, Health • The main requirement is to provide a single point of useful, ubiquitouscomprehensive, and integrated access to various information resources • Web Portals

  6. Internet Portals Example: The Open Directory

  7. Browsing the ODP Topics

  8. Searching the ODP Topics & URLs • Descriptions in ODP consist of the classification of URIs to topics, a textual description and various administrative information

  9. ODP Search Results: Museum Spain Reina Sophia

  10. Search Engines are not Sufficient! • Challenges for useful web portals • Managing several millions of distributed resources • Personalization : viewpoints • Heterogeneity of ressources • Methodology for conceptual design and deployment

  11. Document Management : actual limits • Full-text indexing: • viewpoints not supported • concerns only textual resources • structure is lost • Semantic indexing: • works only with controlled terminologies • concerns only text • structure is lost • Typical document management : • rigid schema • no automatic indexing, limited semantic indexing based on keywords • multilingual support very costly • non-scalable

  12. Knowledge Processes in Corporate Communities Generating new knowledge Accessing knowledge from external sources Representing knowledge in documents and databases Embedding knowledge in services and processes Dissemination of knowledge within organisation Using knowledge in decision making

  13. Advanced Knowledge Schemas (ontologies, thesauri) Heterogeneous resource descriptions Complexity and diversity of information resources <tag1> <tag2> <tag3> </tag1> Community Web Portals: Main Features

  14. What we need? • Flexible Modeling of Community Web Portal Catalogs • Exploit existing forms of community knowledge • Ranging from simple vocabularies to formal ontologies • Describe in various ways heterogenous community resources • Administration, Classification, Content Rating, Channels, …. • Secondary Storage Management of Portal Metadata • Large Schemas: e.g., 170 Mbytes of ODP Topics (the Art Hierarchy contains 25315 terms) • Voluminous DescriptionBases: e.g., 700 Mbytes of ODP indexed sites (2,342,978 URLs) • Declarative Query Languages for Portal Catalogs • Interleave schema with data querying • Optimize access to Portal Catalogs

  15. The C-Web Project Approach RDF Virtual XML Warehouse High-level Access to community information Archives Documents Web Databases • Use W3C Standards to describe (RDF/S) & exchange (XML) information • Our Main Contribution: Declarative Languages for Browsing & Querying

  16. The C-Web Project • EC IST Project (13479) 1999-2000 • Overall Aim: Set-up methodologies and infrastructure for fast deployment and easy management of Web Portals forcommunitiesrequiring • effective knowledge assimilation,elicitation • efficient query answering • Partners: INRIA(FR), FORTH(GR), EDW(IT) • Running Application Scenario: Learning Portals for intranets or the Internet • Corporate Knowledge Servers (e.g., automobile, telecommunications) • Memory Organizations (e.g., museums, libraries, archives) • the MESMUSES Project

  17. Memory organisations Science museums Corporate Memory Scientific Publishing & Digital libraries Education Exploitation areas for C-Web methodology

  18. fname creates exhibited String Artifact Museum Artist String lname Date String sculpts Sculpture Sculptor last_modified title paints technique ExtResource Painting String Painter lname creates “Rodin” &r1 &r5 last_modified exhibited 2000/06/09 &r4 title “Reina Sofia Museum” paints fname “Pablo” &r2 technique “oil on canvas” &r6 lname paints “Picasso” 2000/01/02 last_modified &r3 Building a Cultural Community Web Portal using RDF Portal Schema Portal Resource Descriptions r2: museoreinasofia.mcu.es/ guernica.jpg r1:www.rodin.fr/ thinker.gif r3:www.artchive.com/ woman.jpg r4:museoreinasofia.mcu.es Web Resources

  19. Building Community Web Portals: Open Issues • Extract Resource Metadata • Resource content descriptive metadata • Resource structure descriptive metadata • Facilitate metadata creation fromcommunity resource content • Develop Specific Portal Applications for Communities • Creation of resource-based knowledge maps • Resource recommendation • Favor forms ofcollaboration between community members • Optimize RDF Storage and Queries for Community Portals • Minimize the volume and number of created tables • Develop specific indices for class property hierarchies • Ensure scalability and performance of Portal Development Platform

  20. Programme:(IST) KAIII.1.4. Multimedia Content and Tools (Access to digital collections of cultural and scientific content) Contract: IST-2000-26074 (02/2001 – 07/2003) Partners: INRIA (France), FINSIEL - Multimedia Services (Italy), ICS-FORTH (Hellas), ENSTB - Ecole Nationale Supérieure des Télécommunications - Bretagne (France), VALORIS - Group, Paris (France) IMSS - Istituto e Museo di Storia della Scienza, Firenze (Italy) CSI - Cité des Sciences et de l'Industrie, Paris (France) EDW International, Milano (Italy) DET-UNIFI - University of Florence (Italy) Project “MESMUSES”

  21. Project Summary • MESMUSES aims at designing and experimenting metaphors for organizing, structuring and presenting the scientific and technical knowledge offered to the public by scientific museums. • These metaphors are built upon knowledge maps which define and connect neighbouring knowledge domains. • These maps enable the creation of semantic portals through which users will easily locate information relevant to their current interest, and from which they navigate either on predefined itineraries, or on new routes that they will choose freely on the map.

  22. Design personalisation methodsto offer different itineraries on the same knowledge domains to all the categories of visitors Establish and validate a methodology and the related tool for Scientific KnowledgeCartography (SKC) Choose and experiment with tools for creating “itineraries” on the knowledgelandscape, to orient visitors through a real physical exhibition or a virtual one Design various tools for managing and reusing information assets Project Objectives MESMUSES

  23. Scientific and Technological Innovation • Knowledge representation in RDF The knowledge representation system will be built upon the Resource Description Framework (RDF), a general purpose formalism expressing any metadata system as a labelled directed graph. • Integration of thesauri in an ontology Many valuable hierarchies of concepts are already available in the form of thesauri. It has been demonstrated that hierarchical thesauri can be imported to specialise high-level concepts defined in an ontology represented in RDF. • XML wrapping of dynamic data sources XML wrappers will be mostly used to populate the knowledge representation System with data.

  24. Thank you Hvala Danke Merci Gracias Grazie

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