| append_SI | bool | r/w | append an SI unit. | 
| appended_SI_unit | str | r/w | the SI unit to append. | 
| automatic_denominator | bool | r/w | use an automatic denominator for fractions. | 
| currency | GOffice.FormatCurrency | r/w | GOffice.FormatCurrency. | 
| denominator | int | r/w | fixed denominator. | 
| denominator_max_digits | int | r/w | minimum digits number for the denominator. | 
| denominator_min_digits | int | r/w | minimum digits number for the denominator. | 
| expansion | [ int] | r |  | 
| exponent_digits | int | r/w | digits number in exponent. | 
| exponent_sign_forced | bool | r/w | whether the sign in the exponent is always shown. | 
| exponent_step | int | r/w | steps between allowed exponents in scientific notation. | 
| family | GOffice.FormatFamily | r/w | GOffice.FormatFamily. | 
| force_quoted | bool | r/w | force quotes use. | 
| magic | GOffice.FormatMagic | r/w | GOffice.FormatMagic. | 
| min_digits | int | r/w | minimum digits number. | 
| negative_paren | bool | r/w | uses parenthersis around negative numbers. | 
| negative_red | bool | r/w | display negative number using red ink. | 
| num_decimals | int | r/w | decimals number. | 
| numerator_min_digits | int | r/w | minimum digits number for the numerator. | 
| pi_scale | bool | r/w | use multiples of pi for fractions, e.g. 1/2*pi. | 
| ref_count | int | r |  | 
| scale | int | r/w | scale. | 
| simplify_mantissa | bool | r/w | simplify the mantissa. | 
| split_fraction | bool | r/w | split the fraction. | 
| thousands_sep | bool | r/w | thousands separator. | 
| use_markup | bool | r/w | whether to use a markup. |