I think it does not make sense even for general spreadsheet use; it would be better to specify the type explicitly. (I also think a "zoned spreadsheet" would be

I think it does not make sense even for general spreadsheet use; it would be better to specify the type explicitly. (I also think a "zoned spreadsheet" would be better, although sometimes compatibility might still be needed with existing spreadsheets so a zoned spreadsheet cannot be the only implementation.)