</td></tr>
    </table></td></tr>

<tr><td>PRIORITY</td><td>Hash of tag Priority values for current tag, keyed by tag name (not tag key!)</td></tr>

<tr><td>PRIORITY_DIR</td><td>Name of priority directory (ie. the IFD for the full resolution image)</td></tr>

<tr><td>PROCESSED</td><td>Reference to hash of address/directory names which were processed
    during reading and/or writing</td></tr>

<tr><td>RAF</td><td>Random access file object for reading from input file</td></tr>

<tr><td>RATIONAL</td><td>Hash 