I have read the manual and had a close look at the code but still I have
no idea what the 'Trapped' meta data within Zend_Pdf is used for. What
is the real purpse of 'Trapped'? Could some one please explain it in
other words for a fool like me? :-)
So this is relevant only if your PDF is targetted for a higher-end workflow, where a pre-trapped PDF template (created in InDesign, Quark etc.) is simply customized using PHP, if not I assume it's best to set this parameter to false or null.