Abstract: Semantic wikis have been introduced for collaborative authoring of ontologies as well as for annotating wiki content with semantic meta data. In this paper, we introduce a different approach for a semantic wiki based on an ontology meta model customized especially for the deployment within a wiki. For optimal usability clientside technologies have been combined with a simple semantic query language. Text fragments of a wiki page can be annotated in an interactive and rather intuitive way to minimize the additional effort that is necessary for adding semantic annotation. Thus, the productivity and efficiency of a semantic wiki system will open up for non expert users as well.