Semantic Portal Business and Economics – Project Report 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

Semantic Portal Business and Economics – Project Report 2/11Kai 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

Semantic Portal Business and Economics – Project Report 3/11Kai Eckert and Magnus Pfeffer Research Topics Automatic indexing in the field of economics Thesaurus-based user search interfaces Multi-thesaurus indexing and search

Semantic Portal Business and Economics – Project Report 4/11Kai 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

Semantic Portal Business and Economics – Project Report 5/11Kai 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

Semantic Portal Business and Economics – Project Report 6/11Kai Eckert and Magnus Pfeffer IC Diff Analysis with Semtinel

Semantic Portal Business and Economics – Project Report 7/11Kai 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

Semantic Portal Business and Economics – Project Report 8/11Kai 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

Semantic Portal Business and Economics – Project Report 9/11Kai 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

Semantic Portal Business and Economics – Project Report 10/11Kai 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,...)‏

Semantic Portal Business and Economics – Project Report 11/11Kai Eckert and Magnus Pfeffer Thank you for your attention.

Semantic Portal Business and Economics – Project Report 12/11Kai Eckert and Magnus Pfeffer Additional Slides

Semantic Portal Business and Economics – Project Report 13/11Kai 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.

Semantic Portal Business and Economics – Project Report 14/11Kai Eckert and Magnus Pfeffer Semtinel Workbench

Semantic Portal Business and Economics – Project Report 15/11Kai Eckert and Magnus Pfeffer Semtinel API STW SKOS CSV CDS KEA Pubme d Access Connector Framework Thesaurus Viewer Core Overview IC Diff Collexis RVK MeSH Semtinel Core I/O Framework Analysis Framework IC, IIC Children Frequency GUI Framework Treemap Visualizer

Semantic Portal Business and Economics – Project Report 16/11Kai Eckert and Magnus Pfeffer Intrinsic Information Content

Semantic Portal Business and Economics – Project Report 17/11Kai Eckert and Magnus Pfeffer Information Content

Semantic Portal Business and Economics – Project Report 18/11Kai Eckert and Magnus Pfeffer IC Diff

Semantic Portal Business and Economics – Project Report 19/11Kai Eckert and Magnus Pfeffer Bioscience

Semantic Portal Business and Economics – Project Report 20/11Kai Eckert and Magnus Pfeffer Organisms

Semantic Portal Business and Economics – Project Report 21/11Kai Eckert and Magnus Pfeffer Animals

Semantic Portal Business and Economics – Project Report 22/11Kai Eckert and Magnus Pfeffer Persons