H. Saggion, K. Bontcheva, A. Funk, and D. Maynard. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 837--850. Berlin, Heidelberg, Springer Verlag, (November 2007)