The pervasive Internet and the massive deployment of sensor devices have lead to a huge heterogeneous distributed system connecting millions of data sources and customers together \cite {franklin2001-challenge}. On the one hand, mediation systems \cite {baru1999,bda2005} using XML as an exchange language have been proposed to federate data accross distributed heterogeneous data sources. On the other hand, work \cite {madden-adhoc,abadi2005,bonnet2001-toward,nath2003-irisnet} have been done to integrate data from sensors. The challenge is now to integrate data coming from both "classical" data (DBMS, Web sites, XML files) and "dynamic" data (sensors) in the context of an ad-hoc network, and finally, to adapt queries and result to match the client profile. We propose to use the TGV model \cite {ibis2007,dasfaa2007} as a mobile agent to query sources across devices (sources and terminal) in the context of a rescue coordination system. This work is integrated in the PADAWAN project.