D4 to D5 TFieldMap change

I'm trying to upgrade some code from Delphi 4 to Delphi 5. The code that worked in delphi 4 was

Parser := TExprParser.Create(CursorTable, Expression, [], [], '', nil);

It doesn't work in D5 because the Create funciton has a seventh parameter of TFieldMap. I'm not sure what i should pass in the last parameter in order to make it work in D5. I'm guessing that i'll just pass a null value like the previous parameters, but i can't find the right sytax of a varible to pass into that section. Thanks for any suggestions

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