Henrik Nottelmann Norbert Fuhr The MIND Architecture for Heterogeneous Multimedia Federated Digital Libraries. 112-125 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2924&spage=112 2003 conf/sigir/2003dmir Distributed Multimedia Information Retrieval db/conf/sigir/sigir2003dmir.html#NottelmannF03b