office:value-type="integer" ?

Hello,

Why is there no integer type when storing a number into the cell of a spreadsheet document (version 1.2) ?

After loading a document into the application memory with integers type, would it save memory for large spreadsheet ? Would it speed-up the application (also by side effect of a smaller memory footprint) and the calculations ?

Would it provide a more accurate result with integer arithmetic (than floating point number arithmetic) in specific cases ?