We consider the efficient, scalable management of XML documents in structured peer-to-peer networks based on distributed hash table (DHT) indices. We present an approach for exploiting indices (or materialized views) deployed in the P2P network independently by the peers, to answer an interesting dialect of tree pattern queries. We describe the query (and view) language, provide a rewriting algorithm, discuss view definition indexing strategies based on the DHT, and compare their performance through a set of experiments on a completely deployed platform.