di was formed when the Deutsche Angestellten Gewerkschaft ( DAG ) ( German Salaried Employees ) merged with four unions of the Deutscher Gewerkschaftsbund ( DGB ) ( DPG , HBV , Ã -- TV , IG Medien ) . di was formed when the German Salaried Employees ' Union ( DAG ) merged with four unions of the German Confederation of Trade Unions ( DGB ) ( DPG , HBV , Ã -- TV , IG Medien ) .