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Project Report: Semantic Portal Business and Economics

NKOS Workshop September 19 th 2008 Aarhus, Denmark. Project Report: Semantic Portal Business and Economics. Kai Eckert Computer Science Institute University of Mannheim Germany. Magnus Pfeffer University Library University of Mannheim Germany. Project Goal.

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Project Report: Semantic Portal Business and Economics

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  1. NKOS Workshop September 19th 2008 Aarhus, Denmark Project Report:Semantic Portal Business and Economics • Kai Eckert • Computer Science Institute • University of Mannheim • Germany • Magnus Pfeffer • University Library • University of Mannheim • Germany

  2. Kai Eckert and Magnus Pfeffer Project Goal • Creating a OPAC+ Library Search Enginge • Content • Library media • All licenced fulltext documents • Focus on economics • Modern user interface • Thesaurus-based search and retrieval • Drill-down using facets • Support multiple thesauri

  3. Kai Eckert and Magnus Pfeffer Research Topics • Automatic indexing in the field of economics • Thesaurus-based user search interfaces • Multi-thesaurus indexing and search

  4. Kai Eckert and Magnus Pfeffer Current Status • Prototype indexing system • Elsevier journal articles • STW Thesaurus • Collexis Search Engine • Datasets • Automatic indexing results • Manually indexed articles as gold standard

  5. Kai Eckert and Magnus Pfeffer Automatic Indexing Assessment • Precision and recall comparison • Meaningless numbers on the macro level • Tedious on the micro level • Visual analysis using Semtinel • Per concept IC-Diff analysis • Treemap for navigation • Easy identification of critical concepts

  6. IC Diff Analysis with Semtinel Kai Eckert and Magnus Pfeffer

  7. Kai Eckert and Magnus Pfeffer Automatic Indexing Assessment cont. • Editing of example critical thesaurus concepts • Lack of sysnonyms • Insufficient disamgibuation • Overly broad concepts • Reindexing • Improved Precision and recall

  8. Kai Eckert and Magnus Pfeffer Further Steps • Analysis and Semtinel Tool • Improve framework (SKOS loader)‏ • Document based analysis methods • Multi-Thesaurus Retrieval • Multiple indexes • Merging multiple thesauri • UI Design

  9. Kai Eckert and Magnus Pfeffer Further Steps cont. • Prototype retrieval system • Collexis engine and user interface • User study • Integration into library systems • Representation using RDF and DC • Evaluation of Ex Libris “Primo” product

  10. Kai Eckert and Magnus Pfeffer Open Questions • How can one judge indexing results? Is our approach reasonable? • More ideas or use-cases for Semtinel? Feature-Requests? (e.g. Ontology-Editor, ...)‏

  11. Kai Eckert and Magnus Pfeffer Thank you for your attention. kai@informatik.uni-mannheim.de magnus.pfeffer@bib.uni-mannheim.de

  12. Kai Eckert and Magnus Pfeffer Additional Slides

  13. Kai Eckert and Magnus Pfeffer IC Diff Analysis • Information Content: • Proposed by Resnik • Depends on Frequency in Document Base • Intrinsic Information Content: • Proposed by Seco, Veale und Hayes • Based on the Number of Subconcepts Intuitive: A value between -1 and 1 that says, if a concept has a suspicious frequency regarding its position in the thesaurus.

  14. Semtinel Workbench Kai Eckert and Magnus Pfeffer

  15. Kai Eckert and Magnus Pfeffer STW SKOS RVK MeSH CSV CDS Pubmed Access Collexis KEA I/O Framework GUI Framework Semtinel Core Connector Framework Analysis Framework Treemap Visualizer IC, IIC Core Overview Children IC Diff Thesaurus Viewer Frequency Semtinel API

  16. Kai Eckert and Magnus Pfeffer Intrinsic Information Content

  17. Kai Eckert and Magnus Pfeffer Information Content

  18. Kai Eckert and Magnus Pfeffer IC Diff

  19. Kai Eckert and Magnus Pfeffer Bioscience

  20. Kai Eckert and Magnus Pfeffer Organisms

  21. Kai Eckert and Magnus Pfeffer Animals

  22. Kai Eckert and Magnus Pfeffer Persons

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