This project will develop a network application layer protocol that is specific to the problem of supporting data integration and distributed query processing in system where data sources and connections to data sources are subject to interruption and loss. To date, data integration typically assumes a reliable connection-oriented (CO) communication between data-sources and the entity querying the data-sources. In the context of many applications based on mobile agents (such as aircraft, shipping, cars, etc), a connectionless (CL) communication must be assumed, which the requirement that different routes are used to answer parts of the same query, and that partial caches of information spread over the entire network should be used to answer queries as far as possible.