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THE NET OF THE 21st CENTURY: Concepts across the Interspace

THE NET OF THE 21st CENTURY: Concepts across the Interspace. Bruce Schatz CANIS Laboratory Graduate School of Library and Information Science University of Illinois at Urbana-Champaign www.canis.uiuc.edu, schatz@uiuc.edu. CNI Spring Meeting April 26, 1999 Washington, DC.

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THE NET OF THE 21st CENTURY: Concepts across the Interspace

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  1. THE NET OF THE 21st CENTURY:Concepts across the Interspace Bruce Schatz CANIS LaboratoryGraduate School of Library and Information ScienceUniversity of Illinois at Urbana-Champaign www.canis.uiuc.edu, schatz@uiuc.edu CNI Spring Meeting April 26, 1999 Washington, DC

  2. THE THIRD WAVE OF NET EVOLUTION CONCEPTS OBJECTS PACKETS

  3. CONCEPT SPACES • from Objects to Concepts • from Syntax to Semantics • Infrastructure is Interaction with Abstraction Internet is packet transmission across computers Interspace is concept navigation across repositories

  4. Technology Engineering FORMAL (manual) Electrical IEEE communities INFORMAL groups (automatic) individuals LEVELS OF INDEXES

  5. THE DISTRIBUTED WORLD • Community Repositories in the Interspace • Every Person performs Every Role USER request LIBRARIAN reference INDEXER classify PUBLISHER quality AUTHOR generate

  6. CONCEPTS ACROSS THE INTERSPACE

  7. SCALABLE SEMANTICS • Automatic indexing • Domain-Independent indexing • Statistical clustering • Compute Context of • concepts within documents • documents within repositories

  8. CROSS-OVERS IN SEMANTIC INDEXING

  9. COMPUTING CONCEPTS ‘92: 4,000 (molecular biology) ‘93: 40,000 (molecular biology) ‘95: 400,000 (electrical engineering) ‘96: 4,000,000 (engineering) ‘98: 40,000,000 (medicine)

  10. SIMULATING A NEW WORLD • Obtain discipline-scale collection • MEDLINE from NLM, 10M bibliographic abstracts • human classification: Medical Subject Headings • Partition discipline into Community Repositories • 4 core terms per abstract for MeSH classification • 32K nodes with core terms (classification tree) • Community is all abstracts classified by core term • 40M abstracts containing 280M concepts • concept spaces took 2 days on NCSA Origin 2000 • Simulating World of Medical Communities • 10K repositories with > 1K abstracts (1K w/ > 10K)

  11. COMMUNITY PROCESSING

  12. INTERSPACE NAVIGATION • Semantic Indexes for Community Repositories • Navigating Abstractions within Repository • concept space • category map • Interactive browsing by Community experts

  13. Interspace Remote Access Client

  14. Navigation in MEDSPACE For a patient with Rheumatoid Arthritis • Find a drug that reduces the pain (analgesic) • but does not cause stomach (gastrointestinal) bleeding ChooseDomain

  15. Concept Search

  16. Concept Navigation

  17. Retrieve Document

  18. Navigate Document

  19. Retrieve Document

  20. Category Map

  21. Category Navigation

  22. Concept Navigation

  23. SWITCHING In the Interspace... • each Community maintains its own repository • Switching is navigating Across repositories • use your vocabulary to search another specialty

  24. ENGINEERING SESSION

  25. Engineering Categories & Concepts

  26. Further Concept Navigation

  27. Searching via Concept Suggestion

  28. Switching Across Repositories

  29. Semantic region term Concept Space Concept Space CONCEPT SWITCHING • “Concept” versus “Term” • set of “semantically” equivalent terms • Concept switching • region to region (set to set) match

  30. Medicine Session

  31. Categories and Concepts

  32. Concept Switching

  33. Document Retrieval

  34. INFORMATION SPACEFLIGHT • Landscape as category map visualization • Valleys are semantic clusters • Hills are semantic distances • Traversal across multiple levels of abstraction

  35. Category Maps

  36. SELF-ORGANIZING MAPS (SOMs)

  37. INFORMATION SPACEFLIGHT

  38. THE NET OF THE 21st CENTURY • Beyond Objects to Concepts • Beyond Search to Analysis • Problem Solving via Cross-Correlating Multimedia Information across the Net • Every community has its own special library • Every community does semantic indexing • The Interspace is true Cyberspace

  39. INFORMATION SPACEFLIGHT The Zen of the Net

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