Semantic Portal Business and Economics – Project Report
NKOS WorkshopSeptember 19th 2008
Aarhus, Denmark
Project Report:Semantic Portal Business and Economics
Kai EckertComputer Science Institute
University of MannheimGermany
Magnus PfefferUniversity Library
University of MannheimGermany
2/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
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
3/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Research Topics
Automatic indexing in the field of economics Thesaurus-based user search interfaces Multi-thesaurus indexing and search
4/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Current Status
Prototype indexing system Elsevier journal articles STW Thesaurus Collexis Search Engine
Datasets Automatic indexing results Manually indexed articles as gold standard
5/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
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
6/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
IC Diff Analysis with Semtinel
7/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Automatic Indexing Assessment cont.
Editing of example critical thesaurus concepts Lack of sysnonyms Insufficient disamgibuation Overly broad concepts
Reindexing Improved Precision and recall
8/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Further Steps
Analysis and Semtinel Tool Improve framework (SKOS loader) Document based analysis methods
Multi-Thesaurus Retrieval Multiple indexes Merging multiple thesauri UI Design
9/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
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
10/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
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, ...)
11/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Thank you for your attention.
12/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Additional Slides
13/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
IC Diff Analysis
D IC c = IC c − IIC c
IC c=−log P c IIC c=−log hypo c1max
Information Content:Proposed by ResnikDepends on Frequency in Document Base
Intrinsic Information Content:Proposed by Seco, Veale und HayesBased 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.
14/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Semtinel Workbench
15/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Semtinel APISTW
SKOS
CSV CDSKEA
Pubmed
Access
ConnectorFramework
ThesaurusViewer
CoreOverview
IC Diff
Collexis
RVKMeSH
SemtinelCore
I/OFramework
AnalysisFramework IC, IIC
Children
Frequency
GUIFramework
TreemapVisualizer
16/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Intrinsic Information Content
17/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Information Content
18/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
IC Diff
19/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Bioscience
20/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Organisms
21/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Animals
22/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Persons