Cell

<c r="B3">
  <f>B2+1</f>
  <v>2</v>
</c>

The cell itself is expressed by the <c> collection. Each cell indicates it's location in the grid using A1-style reference notation. A cell can also indicate a style identifier (attribute @s) and a data type (attribute @t). The cell types include string, number, and Boolean. In order to optimize load/save operations, default data values are not written out.