The Reference Data System (RDS) application will assist Member States in the operation of their ASW Gateway Services. The RDS application will serve to manage the master copy of the regionally agreed reference (nomenclature) data and disseminate changes to all ASW Gateways. A Regional Service RDS will provide the facilities to monitor and maintain the Common Data Reference and National Data Reference of all participating AMS. Every registered user of the portal can monitor all the data and perform particular data searches.