Olivier Catteau Philippe Vidal Julien Broisin A Generic Representation Allowing for Expression of Learning Object and Metadata Lifecycle. 30-32 2006 conf/icalt/2006 ICALT http://doi.ieeecomputersociety.org/10.1109/ICALT.2006.16 db/conf/icalt/icalt2006.html#CatteauVB06