If you make a new plugin, please add the list of returned items to this list.

kfile_txt
=========
int     Characters
int     Words
int     Lines
QString Format (Unix/DOS/Macintosh)

kfile_folder
============
int     items
QString size (as a string to display bytes, kB, MB, etc)

kfile_lnk
============
int     Size of target
QString Location
QString Points to
QString Description

kfile_mhtml
===========
QString Sender
QString Recipient
QString CopyTo (The CC: field)
QString Subject
QString Date