Presentation given at ISWC2008. It analyzes complex network characteristics of dependence between terms (i.e. classes and properties) on the Semantic Web as well as dependence between Web ontologies.

1. Term Dependence on the Semantic Web Gong Cheng and Yuzhong Qu Institute of Web Science (IWS) Southeast University, P.R. China at ISWC 2008, Karlsruhe, Germany

2. What is happening on the hypertext Web

3. How about the Semantic Web foaf:Person foaf:Agent wn:Agent-3 rdfs:subClassOf rdfs:subClassOf

4. Term Dependence Graph (TDG) foaf:Person foaf:Agent rdfs:subClassOf wn:Agent-3

6. Distribution of RDF documents on websites bio2rdf.org dbpedia.org openlinksw.com buzznet.com bibsonomy.org l3s.de …

7. Size distribution of RDF documents Maximum at 5 NCI Thesaurus WordNet

9. Distribution of terms in vocabularies EthanAnimals OpenCyc DBpedia properties EthanAnimals FMA

11. In-degree rdf:type rdfs:subClassOf owl:Class rdfs:label rdfs:comment rdfs:Class owl:equivalentClass … cyc:guid … 64.9%

12. Out-degree 40.9% at 5 Focal classes

14. Distance analysis of TDG foaf:Person foaf:Agent rdfs:subClassOf wn:Agent-3

15. Dependence depth Average dependence depth: 10 Leaf classes in FMA

16. Hop plot and effective diameter

17. Connectivity analysis of TDG 93.4% in FMA

18. Connectivity analysis of TDG over 40,000 disconnected pieces after 16 nodes are removed

19. Vocabulary Dependence Graph (VDG) foaf:Person foaf:Agent rdfs:subClassOf wn:Agent-3 foaf rdfs wn

21. Degree analysis of VDG rdf, rdfs, owl, daml Average in-/out-degree: 3.75

22. Distance analysis of VDG

23. Connectivity analysis of VDG

26. Thank you for your attention yu`yiwon 语义网 Semantic Web shu`shin 属性 Property ley 类 Class benty 本体 Ontology P ronunciation Chinese English

27. Power-law