Javier D. Fernández, Sebastian Hellmann: Proceedings of the Posters and Demos Track of the 13th International Conference on Semantic Systems - SEMANTiCS2017 co-located with the 13th International Conference on Semantic Systems (SEMANTiCS 2017), Amsterdam, The Netherlands, September 11-14, 2017. CEUR Workshop Proceedings 2044, CEUR-WS.org 2018