Robot tags

[Richard Porter]

I've just been looking through the stats (Matrix Stats) on one of the 
web sites I maintain, and I notice under "Robot tags":
NetSurf/2.0 (RISC OS; armv4l)

NetSurf is not listed under "Browser Tags" which does include psbot, 
Googlebot, msnbot and Speedy Spider as well as the usual Mozilla 
variants. The same bots also appear under "Robot Tags".

I'm assuming the stats are unreliable (they say "it's often possible 
to tell ..."), but how do they know what's a robot request and what's 
not?

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|_|. _   Richard Porter               http://www.minijem.plus.com/
|\_||_                                mailto:ricp at minijem.plus.com