Common wiki applications lack possibilities to structure the relationships between wiki pages. This paper presents a semantic wiki prototype named SHAWN that allows modelling concepts and their relationships within a wiki environment. One goal of this prototype is to keep concept creation very simple. Yet, entering relationship data instantaneously gratifies the user with enhanced navigational means on the wiki. The engine supports simple semantic queries upon the emergent model. A challenge is to accommodate a self-explaining query interface for these ontologies.