Deliverable D4.3.1 - Design of procedures and structures for the support of the inter-peer semantic queries

In a P2P distributed scenario as the one of the NeP4B, where query answers can come from any peer connected through a semantic path a key challenge is the query routing. The routing is the capability of selecting a small subset of relevant peers to forward a query to. Flooding-based techniques are indeed not adequate for both efficiency and effectiveness reasons: not only they overload the network (forwarded messages and computational effort required to solve queries), but also overwhelm users with a large number of results, mostly irrelevant. In this deliverable we present an innovative mechanism for a unified data retrieval for both semantic and multimedia content.