Just like last century industrial societies depend on natural resources, today? S society depends on information and exchange. Staab and Stuckenschmidt structured the selected contributions into four parts: Part I, set "Data Storage and Access", the basic semantics, namely Part II, "query Networks", consider the query routing, as well as personal questions and requests continuously under conditions of permanent structural changes in network topology peer-to-peer. Finally, Section IV, the report "Methodology and Systems", the experience of case studies and examples of applications. The overall result is a state-description-the-art of Semantic Web and technology potential of peer-to-peer to share information and knowledge management when applied jointly.