11. The data processing system of claim 1 where the module definition software code from more than one spreadsheet module definitions is combined to create a composite workbook definition.
11. The data processing system of claim 1 where the module definition software code from more than one spreadsheet module definitions is combined to create a composite workbook definition. 14. The data processing system of claim 11 where the module definition software code defining the composite workbook definition is compiled into a binary software application or library and exposed as a function or procedure call.