de <small>PNG</small>, <small>XCF</small> and
<small>JPG</small>.  Opaque formats include proprietary formats that can be
read and edited only by proprietary word processors, <small>SGML</small> or
<small>XML</small> for which the <small>DTD</small> and/or processing tools are
not generally available, and the machine-generated <small>HTML</small>,
PostScript or <small>PDF</small> produced by some word processors for
output purposes only.

     <p>The "Title Page" means, for a printed book, the title page it