Ontology Engineering 12th International Experiences and Directions Workshop on OWL, OWLED 2015, co-located with ISWC 2015, Bethlehem, PA, USA, October 9-10, 2015, Revised Selected Papers - Tamma, Valentina; Dragoni, Mauro; Gonçalves, Rafael; Ławrynowicz, Agnieszka (Springer International Publishing : Imprint: Springer, 2016)