Haofen Wang Thomas Penin Kaifeng Xu Junquan Chen Xinruo Sun Linyun Fu Qiaoling Liu Yong Yu Thanh Tran Peter Haase Rudi Studer Hermes: a travel through semantics on the data web. 1135-1138 2009 SIGMOD Conference http://doi.acm.org/10.1145/1559845.1560002 conf/sigmod/2009 db/conf/sigmod/sigmod2009.html#WangPXCSFLYTHS09