<workbook>
  <worksheet name="cell_type">
    <cell type="string">String</cell>
    <cell type="number">Number</cell>
    <cell type="blank">Blank</cell>
    <cell type="url">URL</cell>
    <cell type="formula">Formula</cell>
    <cell type="date_time">DateTime</cell>
   </worksheet>
</workbook>