Filter and backend API introduction for the Common UNIX Printing System (CUPS).
- Copyright 1997-2005 by Easy Software Products.
+ Copyright 1997-2006 by Easy Software Products.
These coded instructions, statements, and computer programs are the
property of Easy Software Products and are protected by Federal
<h2 class='title'>Introduction</h2>
-<p>The CUPS filter and backend APIs provide...</p>
+<p>The CUPS filter and backend APIs define standard exit codes
+and provide access to the backchannel data stream. They are only
+used when writing backends, filters, and port monitors.</p>
<h2 class='title'>General Usage</h2>
<p>The <var><cups/backend.h></var> and
<var><cups/cups.h></var> header files must be included to
use the <tt>CUPS_BACKEND_</tt> constants and
-<tt>cupsBackchannel</tt> functions, respectively.</p>
+<tt>cupsBackChannel</tt> functions, respectively.</p>
<p>Programs using these functions must be linked to the CUPS
library: <var>libcups.a</var>, <var>libcups.so.2</var>,