TML escaping if Escape option is set</td></tr>

<tr><td>EXCL_TAG_LOOKUP</td><td>Hash for looking up excluded tags (keys are lower case tag names)</td></tr>

<tr><td>EXIF_DATA</td><td>EXIF data block (valid while reading from file)</td></tr>

<tr><td>EXIF_POS</td><td>Position of EXIF data in file</td></tr>

<tr><td>FILENAME</td><td>Name of input file while extracting (only if we opened it, '' otherwise)</td></tr>

<tr><td>FILE_ORDER</td><td>Hash of numbers to give the sequence the tags were
    extracted fro