Proceedings of the Joint Ontology Workshops 2019 Episode {V:} The Styrian Autumn of Ontology, Graz, Austria, September 23-25, 2019

These proceedings include the papers presented at JOWO 2019, the fifth edition of the Joint Ontology WOrkshops (JOWO). JOWO is a venue of workshops that, together, address a wide spectrum of topics related to ontology research, ranging from cognitive science to knowledge representation, natural language processing, artificial intelligence, logic, philosophy, and linguistics. JOWO's mission is to pro- vide a platform for the diverse communities interested in building, reasoning with, and applying formalised ontologies both in theory and applications