Fuchs-Kittowski, F.; Faust, D.: The design and evolution of an enterprise architecture (EA) is a challenging and complex task. A participative approach to collaborative EA management is needed to support the collaboration of all individuals involved in the process of EA design and evolution. This paper presents our concept of a semantic collaboration tool for collaborative EA management. This includes the concept of a semantic, wiki-like collaboration tool for collaborative EA management and an EA ontology as a formal representation of the EA. Additionally, the prototypical implementation of the semantic collaboration environment and its architecture are described and the benefits of the approach discussed.