May be you could take a look at WeakDicts, http://www.handshake.de/~dieter/weakdict.html Emmanuel -- Emmanuel Viennet: <viennet at lipn.univ-paris13.fr> LIPN - Institut Galilee - Universite Paris-Nord 93430 Villetaneuse - France http://www-gtr.iutv.univ-paris13.fr/