These examples demo how to use ontop as an Java API from maven [1].
[1] Timea Bagosi, Diego Calvanese, Josef Hardi, Sarah Komla-Ebri, Davide Lanti, Martin Rezk, Mariano Rodriguez-Muro, Mindaugas Slusnys, and Guohui Xiao. The ontop framework for ontology based data access. In Proc. of the 8th Chinese Semantic Web Symposium & Web Science Conference (Posters and Demos), Wuhan, China, August 2014. pdf