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From: Kai.Grossjohann@CS.Uni-Dortmund.DE
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Subject: How to pass information to backend?
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I have written nnir.el which allows you to search your mail.  It is a
`virtual backend'.  The group name is interpreted as the query (and
vice versa), and nnir.el creates a virtual group with the query
results in it.

I think passing information between Gnus and the backend via the group
name is a suboptimal solution.  For example, queries might get quite
long, and long group names are difficult to show in the mode line.

But mostly my problem with this is that I feel I am misusing the group
name for something it was never intended for.

Have you got better suggestions on how to communicate between Gnus and
the backend?

kai
-- 
I like _b_o_t_h kinds of music.