32. The computer-readable medium of claim 27 , wherein (A) (1) comprises assigning the plurality of catalog-defined logical types to the plurality of atomic tuples by matching data types of the plurality of cells with a library of logical data types.
32. The computer-readable medium of claim 27 , wherein (A) (1) comprises assigning the plurality of catalog-defined logical types to the plurality of atomic tuples by matching data types of the plurality of cells with a library of logical data types. 34. The computer-readable medium of claim 32 , wherein the grid comprises a spreadsheet.