Yannis Theoharis George Georgakopoulos Vassilis Christophides On the Synthetic Generation of Semantic Web Schemas. 98-116 2007 SWDB-ODBIS http://dx.doi.org/10.1007/978-3-540-70960-2_6 conf/odbis/2007 db/conf/odbis/odbis2007.html#TheoharisGC07