Theory, Practice, and Applications of Rules on the Web 7th International Symposium, RuleML 2013, Seattle, WA, USA, July 11-13, 2013. Proceedings - Morgenstern, Leora; Stefaneas, Petros; Lévy, François; Wyner, Adam; Paschke, Adrian (Springer Berlin Heidelberg : Imprint: Springer, 2013)