 
 create table DAEDeviceUsers
 (
-	User_ID nvarchar(200) not null,
+	User_ID character varying(200) not null,
 	Device_ID int not null,
-	UserID nvarchar(200) not null,
-	Data nvarchar(200) not null,
-	ConnectionParameters nvarchar(500) not null,
+	UserID character varying(200) not null,
+	Data character varying(200) not null,
+	ConnectionParameters character varying(500) not null,
 	constraint PK_DAEDeviceUsers primary key (User_ID, Device_ID)
 	--reference DeviceUsers_Users { User_ID } references Users { ID },
 	--reference DeviceUsers_Devices { Device_ID } references Devices { ID },

create table DAEOperators
(
	ID int not null,
	OperatorName nvarchar(200) not null,
	Signature ntext not null,
	constraint PK_DAEOperators primary key (ID)
	--reference Operators_OperatorNames { OperatorName } references OperatorNames { Name },

create table DAECatalogObjects
(
	ID int not null,
	Name character varying(200) not null,
	Library_Name character varying(200) not null,
	Owner_User_ID character varying(200) not null,
	constraint PK_DAECatalogObjects primary key (ID)
	--reference CatalogObjects_Objects { ID } references Objects { ID },
	--reference CatalogObjects_Users { Owner_User_ID } references Users { ID }
