Dear all @ BaseX, Db :create has now a path argument. Could the CREATE command get this argument too ? For the moment, one have to do the following set of commands to create a collection and put the documents in a specific path : - Create... - Rename... - Optimize... - Close So, optimization is done twice, with a real impact on creation's duration. Does somebody have comments on the possibility to directly move data from a collection to another without having to export and add files ? I'm writing Talend components for BaseX, is this interesting other people out there ? Best regards from the snowy French Riviera... Fabrice Etanchaud Questel-Orbit