-.TH PNG 5 "September 12, 2004"
+.TH PNG 5 "April 25, 2013"
.SH NAME
png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION
platforms.
.SH "SEE ALSO"
-.IR libpng(3), zlib(3), deflate(5), and zlib(5)
+.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
.LP
PNG specification (second edition), November 2003:
.IP
.SH COPYRIGHT NOTICE
.LP
-This man page is Copyright (c) 1998-2004 Glenn Randers-Pehrson. See png.h
+This man page is Copyright (c) 1998-2006 Glenn Randers-Pehrson. See png.h
for conditions of use and distribution.
.LP
The PNG Specification (Second Edition) is