Maria, NunoSilva, Mário J.2009-02-102014-11-142009-02-102014-11-141999-05http://hdl.handle.net/10451/14200http://repositorio.ul.pt/handle/10455/2906Efficient information retrieval of highly dynamic information, such as news, is a complex task. As a result, search and retrieval environments for continuously updated news, from other sources than the largest media conglomerates, are almost absent on the Internet. To address this problem, we propose an architecture for a retrieval mechanism designed to improve retrieval efficiency of online news for the networked communities not indexed by the global search enginesporInformation RetrievalNews Digital LibrariesAgentsreport