To accommodate feedback received from practical experience through implementations version 2 of the NES deliverables was made available on July 11, 2007.
The first version of the northern European implementation of UBL 2.0 was made available on March 23, 2007. Based on practical experience through implementation efforts comments have been received against NES version 1. To accommodate these comments a corrected publication, NES version 2, was made available on July 11, 2007.