1. 1 SWARMS: A Tool for Domain Exploration in Semantic Web and its Application in FOAF Domain Bangyong Liang, Jie Tang, Juanzi Li, Kehong Wang Dept. of Computer Science, Tsinghua Univ.

2. 2 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

3. 3 Design Goal Easy to migrate among domains Sourceforge, http://www.sourceforge.nethttp://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

4. 4 Current Implementation Backend Storage Database + Jena Index-based Search Lucene + Database Visualization and Navigation JUNG based Layout and renderer

5. 5 System Components PNS DB Jena based FOAF API FOAF Ontology repository Lucene Index Repository Index-based Search JUNG based Visualization Association Search User interface

6. 6 Index-based Search

7. 7 Context Visualization

8. 8 Paper Cluster Visualization

9. 9 Friend Cluster Visualization

10. 10 Person View

11. 11 Paper View

12. 12 Association View

13. 13 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

14. 14 Performance Analysis Index Performance Performance for fetching one instance’s context 20 instances with different number of propterties are evaluated KeywordNumber of Results Time(seconds) Li9210.11(s) Zhang7590.11(s) James5450.09(s) Liang1800.09(s) Tim1560.09(s) Baul00.09(s) Max(s)Min(s)Average(s) 0.02 0.010.014