<< some snipping and tucking >>
>
>Thanks, I got it. From another user, I learned they're are a part of
>regular expressions. Where can I find more about them? It'll be great if
>I can see more examples too.
>
On usenet, try reading news.software.readers where "I need a regex to
match foo" questions are posted regularily and answered occassionally.
The trn killfile faq is also worth reviewing for info.
If you have access to a unix box of any sort, try 'man ed(1)' 'man grep'
and/or 'man regex'
If not, on the web, try looking at the FreeBSD Hypertext Man pages at:
http://www.de.FreeBSD.org.
Or look at the manuals for your compiler of choice.
Also remember with souper, you the whole article header is downloaded when
scoring and there are several fields in the header that worth scoring on,
such as the path, newsgroup, xref, nntp-posting-host, references, etc.