The development of P2P networks leads to new opportunity for large-scale data sharing, and in particular sharing of Web data such as XML, RDF, or mixed data formats comprising XML documents with RDF annotations. We present the ViP2 approach (standing for views in peer-to-peer) for disseminating and efficiently querying XML data. ViP2P is built on top of a structured P2P network, and allows each peer to subscribe to XML query results. Moreover, ViP2P provides efficient mechanisms to process queries in snapshot mode, re-using the results of continuous queries stored on the other peers. We show how ViP2P generalizes and other previous XML data management models for P2P networks and conclude by a short demo of the system.