from ontoselect to ontoselect-swse
DESCRIPTION
From OntoSelect to OntoSelect-SWSE. Paul Buitelaar, Andreas Harth DERI – NUIG, Galway February 2009. Outline. OntoSelect @ DFKI Recap of OntoSelect Functionality OntoSelect @ DERI SWSE: Semantic Web Search Engine Architecture OntoSelect-SWSE OntoSelect-SWSE Experiments - PowerPoint PPT PresentationTRANSCRIPT
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1 Copyright 2008 Digital Enterprise Research Institute. All rights reserved.
Digital Enterprise Research Institute www.deri.ie
From OntoSelect to OntoSelect-SWSE
Paul Buitelaar, Andreas HarthDERI – NUIG, Galway
February 2009
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Outline
OntoSelect @ DFKI Recap of OntoSelect Functionality
OntoSelect @ DERI SWSE: Semantic Web Search Engine Architecture OntoSelect-SWSE
OntoSelect-SWSE Experiments Ranked List of Ontologies with Rich Metadata
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OntoSelect
Ontology Library and Ontology Search Service
http://olp.dfki.de/OntoSelect
OntoSelect monitors the web for ontologies (indexing/updates) Ontology browse and search (by keyword, topic, document) Class, property and (multilingual) label browse and search Ontology publishing (submit your ontology) Statistics on
– Formats– Human languages– Frequently used labels– Ontology publishing
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Browse Ontologies
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Ontology Search
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Expand Search with Wikipedia Topic
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Keyword Extraction & Ranked Ontologies
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OntoSelect Statistics - Multilinguality
English German French Spanish
Portugese Hungarian Italian Polish
Dutch Russian Japanese
Distribution of languages in 136 ontologies with multilingual labels - out of 1530 ontologies currently collected (~9%)
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OntoSelect Statistics - Labels
Most frequently used labels (‘words’, ‘terms’) in 1530 ontologies
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SWSE: Semantic Web Search Engine
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SWSE Architecture
Distributed shared-nothing architecture Implementation scales to billions of triples
Crawler Reasoner Indexer
HTTPQuery
Processor
Ranker
User Interface
Linked Data Raw
Data
Material-isedData
CompleteIndex
Ranks
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OntoSelect-SWSE
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OntoSelect-SWSE Experiments
Experiment Onto Seed set from Google & Yahoo (*.owl, *.daml, *.rdfs) 27,519 data sources (ontologies) 6.5m statements
Experiment Web Crawling six degrees from seed URI
http://www.w3.org/People/Berners-Lee/card 100,555 data sources (instance data + ontologies) 11.9m statements
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Ranked List of Ontologies - Onto
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Ranked List of Ontologies - Web
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Conclusion
SWSE framework facilitates web data experiments
Taking into account real-world instance usage improves ontology ranking
Web data is noisy (more data providers == more noise)
Ontology registry should include rating facility to “vote out” data sources that do not provide consensus view