ss='clear'>
    <tr valign='top'><td>Absolute</td><td>-</td><td>flag set if PreviewImage pointer is relative to the
    start of file</td></tr>
    <tr><td>BaseShift</td><td>-</td><td>shift for base of pointer offsets</td></tr>
    <tr valign='top'><td>Data</td><td>-</td><td>data for PreviewImage to be written (may either be data
    for the old or new image, or 'LOAD_PREVIEW' to indicate that the data must be loaded from outside
    the EXIF segment)</td></tr>
    <tr><td>Fixup</td><td>-</td><td>[mandatory