In: R. Meersman; Z. Tari (Hrsg.). On the Move to Meaningful Internet Systems. OnTheMove Federated Conferences & Workshops (OTM-2008), located at OTM Confederated International Conferences, CoopIS, DOA, GADA, IS, and ODBASE, November 12-14, Monterrey, Mexico, Pages 475-473, Lecture Notes in Computer Science (LNCS), Vol. 5331, Springer, 2008.