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On Graph Features of Semantic Web Schemas
Found in: IEEE Transactions on Knowledge and Data Engineering
By Yannis Theoharis, Yannis Tzitzikas, Dimitris Kotzinos, Vassilis Christophides
Issue Date:May 2008
pp. 692-702
In this paper, we measure and analyze the graph features of Semantic Web (SW) schemas with focus on power-law degree distributions. Our main finding is that the majority of SW schemas with a significant number of properties (resp. classes) approximate a po...
On Provenance of Queries on Semantic Web Data
Found in: IEEE Internet Computing
By Yannis Theoharis, Irini Fundulaki, Grigoris Karvounarakis, Vassilis Christophides
Issue Date:January 2011
pp. 31-39
Capturing trustworthiness, reputation, and reliability of Semantic Web data manipulated by SPARQL requires researchers to represent adequate provenance information, usually modeled as source data annotations and propagated to query results along with a que...