Data Modeler doesn't hold schema information for each table, but when exporting to TMS Aurelius classes you can use customization script to add the schema name to the table attribute. The following script adds the schema name dbo to the table category:
procedure OnClassGenerated(Args: TClassGeneratedArgs);
begin
if Args.DBTable.TableName = 'category' then
Args.TableAttr.AddRawArgument('''dbo''');
end;
For example, originally the class would be generated like this:
[Entity]
[Table('Category')]
[Id('FCategoryID', TIdGenerator.IdentityOrSequence)]
TCategories = class
With the following script the Table attribute will be like this:
[Entity]
[Table('Category', 'dbo')]
[Id('FCategoryID', TIdGenerator.IdentityOrSequence)]
TCategories = class