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Enrichment of Library Authority Files by Linked Open Data Sources Gerd Zechmeister Semantic Web Company –
Presentation agenda 1.About us 2.LOD2 Project 3.Demonstration Scenario 4.Process & Results 5.Summary & Outlook © Semantic Web Company –
About us Based in Vienna (privately held) 20 specialists from several fields Focus: Semantic (web) technologies & search applications –1st project based on semantic technologies in 2001 –Foundation of Semantic Web School in 2004 Semantic Web Company GmbH since 2008 –PoolParty development started in 2007, on the market since 2009 © Semantic Web Company –
PP Thesaurus Manager © Semantic Web Company – 1.Each concept in one or many concept schemes 2.Each concept has one URI 3.Each concept has one ore more labels 4.(Poly-)Hierarchical and non-hierachical relations 5.Matching between concepts from various sources 1.Each concept in one or many concept schemes 2.Each concept has one URI 3.Each concept has one ore more labels 4.(Poly-)Hierarchical and non-hierachical relations 5.Matching between concepts from various sources
SKOSsy © Semantic Web Company – Select DBPedia categories Choose extraction depth, data to extract and format (TTL, TriG etc.) Extract it and import it into PoolParty as Seed Thesaurus
FP7 project ( ) 15 partners (technology researchers, companies and service providers) from 11 European countries plus 1 associated partner from Korea Coordinated by the AKSW research group at the University of Leipzig © Semantic Web Company –
LOD Life-Cycle Management © Semantic Web Company – Extraction of RDF from text, XML and SQL Querying and Exploration using SPARQL Authoring of Linked Data using a Semantic Wiki Semi-automatic link discovery between Linked Data sources Knowledge-base Enrichment and Repair
Demonstration Scenario Alignment –Example Data vs LOD resources in SKOS –Identification of matching concepts Enrichment –Addition of matches to Example Data dump © Semantic Web Company –
Demonstration Scenario Applied tools and frameworks © Semantic Web Company – Tool/FrameworkFunction Using SKOS Thesauri as graph/SPARQL endpoint Creating example data as graph/SPARQL endpoint Comparing data to detect matching concepts Extracting categories from DBPedia to import it as Thesaurus into PoolParty
Demonstration Scenario Example Data –Schlagwortnormdatei (SWD = keyword authority file) from DNB data dump – concepts in German with alignments to LCSH, RAMEAU etc. –Expressed in SKOS (hierarchical and associative relations) © Semantic Web Company –
Demonstration Scenario SKOS vocabularies for alignment –Standard Thesaurus Economy (STW) 6520 concepts with english/german prefLabel –European Union Thesaurus (EUROVOC) 6797 concepts with multilingual prefLabel –Extracted concepts from DBPedia via SKOSsy: „Economy“ concepts in German © Semantic Web Company –
Process & Results: preparational steps 1.Download –SWD data dump from DNB server 2.Evaluation –SKOS compatibility 3.Transformation –SWD data as SPARQL endpoint 4.Vocabulary selection –Focus on Economy vocabularies © Semantic Web Company –
Process & Results: Alignment Specification in SILK workbench –Define data sources: SWD & EUROVOC –Define tasks: compare all skos:prefLabels and deliver all matching links –Initiate process and create output file © Semantic Web Company –
SILK Workbench © Semantic Web Company – Alignment SWD vs EUROVOC
SILK Workbench © Semantic Web Company – Alignment SWD vs EUROVOC
Process & Results: Alignment © Semantic Web Company – SWD cs. STW 6520 cs. EUROVOC 6797 cs. DPPedia Wirtschaft cs matching links
Process & Results: Enrichment © Semantic Web Company – Upload of exactmatches to the SWD graph in Virtuoso
Process & Results: Enrichment © Semantic Web Company – SubjectPredicateObject
© Semantic Web Company – SWD DBPedia EUROVOC STW
Process & Results: Enrichment © Semantic Web Company – Weiter als im Gabler definiert, auch für öffentliche Abfallwirtschaft (DE-588) (DE-588c) Abfallwirtschaft
Summary & Outlook Playground for future scenarios –Linked Open Library Data –LOD2 technology stack components Further applications –Executing tasks for regular updates –Link exchange with LOD providers –Integration of data and cross-media (e.g. geo-references, images, AV files) –Expansion of authority files for cataloguing (e.g. multilingual searches) © Semantic Web Company –
Get in contact! © Semantic Web Company – Semantic Web Company GmbH Mariahilfer Strasse 70/ Vienna - Austria Gerd Zechmeister Research & Development Manager
Thesaurus Management and User-Friendliness: a contradiction? Helmut Nagy Semantic Web Company
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