gnus: Topic Topology
2.16.4 Topic Topology
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So, let’s have a look at an example group buffer:
Gnus
Emacs -- I wuw it!
3: comp.emacs
2: alt.religion.emacs
Naughty Emacs
452: alt.sex.emacs
0: comp.talk.emacs.recovery
Misc
8: comp.binaries.fractals
13: comp.sources.unix
So, here we have one top-level topic (‘Gnus’), two topics under that,
and one sub-topic under one of the sub-topics. (There is always just
one (1) top-level topic). This topology can be expressed as follows:
(("Gnus" visible)
(("Emacs -- I wuw it!" visible)
(("Naughty Emacs" visible)))
(("Misc" visible)))
This is in fact how the variable ‘gnus-topic-topology’ would look for
the display above. That variable is saved in the ‘.newsrc.eld’ file,
and shouldn’t be messed with manually—unless you really want to. Since
this variable is read from the ‘.newsrc.eld’ file, setting it in any
other startup files will have no effect.
This topology shows what topics are sub-topics of what topics
(right), and which topics are visible. Two settings are currently
allowed—‘visible’ and ‘invisible’.