G. Gottlob, G. Orsi, and A. Pieris. (2011)cite arxiv:1112.0343Comment: Extended version of "Ontological Queries: Rewriting and Optimization" presented at ICDE 2011.
A. Martin, D. Maladhy, and V. Venkatesan. (2011)cite arxiv:1109.1088Comment: Classification, Ontology, Business Intelligence, Datamining, Inverted Index, Ontology Tree Index.