Hacène Cherfi Olivier Corby Catherine Faron-Zucker Khaled Khelif M. T. Nguyen Semantic Annotation of Texts with RDF Graph Contexts. 75-82 2008 ICCS Supplement http://ceur-ws.org/Vol-354/p40.pdf conf/iccs/2008s db/conf/iccs/iccss2008.html#CherfiCFKN08