1. T.Sharon-A.Frank 1 Internet Resources Discovery (IRD) Additional Aspects

2. 2 T.Sharon-A.Frank Additional Aspects Personal vs. public library Multimedia library Library composition and cccess Search engines vs. Digital libraries Parallel evolution of SE/DLs

3. 3 T.Sharon-A.Frank Personal vs. Public Library

4. 4 T.Sharon-A.Frank Multimedia DL Mixed Media Library Multimedia Summaries Multimedia User Interface –Query by Example –Hypermedia Support Multimedia Engine: –MMDB (Multimedia Database) –MMIR (Multimedia Information Retrieval)

5. 5 T.Sharon-A.Frank Composed Digital Libraries University Library Exact SciencesLife SciencesSocial Sciences Computer ScienceChemistry SoftwareHardware

6. 6 T.Sharon-A.Frank Document Titles - RankedDocument Titles - Ranked SummariesSummaries AbstractsAbstracts Full DocumentsFull Documents Search Results: Several Possible Representations

7. 7 T.Sharon-A.Frank Transparent Access Search on Keywords/Fields Browse/NavigateView/Cross Full Index Topics Tree Relations DL Summaries Documents Natural Language Declarative Procedural Resources DL Access Methods

8. 8 T.Sharon-A.Frank Many Access Methods?

9. S earch E ngine D irectory WEB Digital Library

10. 10 T.Sharon-A.Frank SE vs. DL Potential Coverage Resources Relevan t SE DL

11. 11 T.Sharon-A.Frank SE vs. DL - Server Side

12. 12 T.Sharon-A.Frank SE vs. DL - Client Side

13. 13 T.Sharon-A.Frank Basic SE (BSE) Meta SE (MSE) Popularity SE (PSE) Stand Alone DL (SDL) Harvested DL (HDL) Federated DL (FDL) Digital Library (DL) Search Engine (SE) Directory (Catalog, Guide, Subject Gateway) Resource Repositories Hierarchy

14. 14 T.Sharon-A.Frank Parallel Evolution of SEs and DLs Search Engines Generations Digital Libraries Generations 1 st Generation – Basic Search Engine includes Robots, Indices, Directories, basic/advanced user interfaces 1 st Generation – Single DL (SDL) local, classical, focused material, digitized or scanned 2 nd Generation – Meta Search Engine uses several basic-SEs simultaneously, ranks gathered pages by relevancy 2 nd Generation – Federated (FDL) several autonomous SDLs representing heterogeneous networked repositories 3 rd Generation – Popularity Search Engine uses link analysis and use frequency measures to filter and rank the Web pages 3 rd Generation – Harvested (HDL) contains only summaries and metadata structures; domain focused, of fine granularity

15. 15 T.Sharon-A.Frank Next Generations 3rd Generation HDL 4th Generation INTELIGENT DL (KM, AI) 5th Generation PORTAL MEGA / META PORTAL