Undocumented detail from ls -l?

[peasthope@shaw.ca]

Folk,

peter@joule:~$ dmesg | grep Debian
[    0.000000] Linux version 2.6.32-5-686 (Debian 2.6.32-38) (ben@decadent.org.u
k) (gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Mon Oct 3 04:15:24 UTC 2011
peter@joule:~$ ls -l /dev/fw1
crw-rw----+ 1 root video 252, 1 Nov  7 11:54 /dev/fw1

What is the meaning of the + following the permissions?
I googled around for about 10 minutes and found nothing.  
Is it documented?

[Digresion
*	From: Camale&#xF3;n <noelamac@gmail.com>
*	Date: Tue, 8 Nov 2011 15:21:20 +0000 (UTC)
> I would carefully read Coriander manual web page: ...

Right oh.  Working on it.]

Thanks,                ... Peter E.


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