Towards Query Formulation and Query−Driven Ontology Extensions in OBDA - Grau, B; Giese, M; Horrocks, I; Hubauer, T; Jiménez−Ruiz, E; Kharlamov, E; Schmidt, M; Soylu, A; Zheleznyakov, D (OWL Experiences and Directions Workshop (OWLED), 2013)