e pointers to memory locations
    where the tag values are to be returned and also returns one or
    zero according to whether the requested tag is defined in the directory.
    The <i>set interface</i> takes the tag values either by-reference or
    by-value.
    The TIFF specification defines
    <i>default values</i> for some tags.
    To get the value of a tag, or its default value if it is undefined,
    the <tt>TIFFGetFieldDefaulted</tt> interface may be used.
  </p>
  <p>
    The manual pages for t