1 swarms: a tool for domain exploration in semantic web and its application in foaf domain bangyong...
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SWARMS: A Tool for Domain Exploration in Semantic Web and its
Application in FOAF Domain
Bangyong Liang,Jie Tang,Juanzi Li,
Kehong WangDept. of Computer Science, Tsinghu
a Univ.
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Domain Exploration Tool
Semantic Web is made up of domain specific data
Some problems still exist Visualization and Navigation Mining Index-based Search Association Search
SWARMS provides an easy way to explore domain data
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Design Goal
Easy to migrate among domains Sourceforge, http://www.sourceforge.net XinhuaML, Chinese News Domain FOAF, Friend-of-a-Friend
Manage large-scale domain specific data Index-based search, based on Lucene Database backend storage
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Current Implementation
Backend Storage Database + Jena
Index-based Search Lucene + Database
Visualization and Navigation JUNG based Layout and renderer
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System Components
PNSDB
Jena basedFOAF API
FOAFOntologyrepository
Lucene
IndexRepository
Index-basedSearch
JUNG basedVisualization
Association Search
User interface
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Index-based Search
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Context Visualization
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Paper Cluster Visualization
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Friend Cluster Visualization
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Person View
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Paper View
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Association View
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Data Size
Current Ontological Data Size >400,000 persons and their publications foaf:knows, foaf:publications, foaf:topic, foaf:maker jena_g1t1_stmt > 3,000,000 records
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Performance Analysis
Index Performance
Performance for fetching one instance’s context 20 instances with differen
t number of propterties are evaluated
Keyword Number of Results
Time(seconds)
Li 921 0.11(s)
Zhang 759 0.11(s)
James 545 0.09(s)
Liang 180 0.09(s)
Tim 156 0.09(s)
Baul 0 0.09(s)
Max(s) Min(s) Average(s)
0.02 0.01 0.014