<mime-type type="application/vnd.ms-excel.sheet.4">
    <_comment>Microsoft Excel 4 Worksheet</_comment>
    <magic priority="60">
      <match value="0x09040600" type="string" offset="0">
        <match value="0x00001000" type="string" offset="4"/> <!-- Sheet -->
        <match value="0x00002000" type="string" offset="4"/> <!-- Chart -->
        <match value="0x00004000" type="string" offset="4"/> <!-- Macro -->
      </match>