%struct = {
 row1 => { key0 => 'val0', key1 => 'val1', keyX => 'valX' },
 row2 => { key0 => 'val0', key1 => 'val1', keyX => 'valX' },
 row3 => { key0 => 'val0', key1 => 'val1', keyX => 'valX' },
 ....
 rowX => { key0 => 'val0', key1 => 'val1', keyX => 'valX' },

};