[Mediawiki-l] Keeping Subcategories out of Special:Categories?

[Jason Young]

While trying to go through the Categories documentation because one  
of our peers can't for the life of them understand categories and  
subcategories (which may be an issue far beyond help ;-) - I did  
notice something interesting about meta.wikimedia.org that I'd like  
to somehow duplicate, which may help (well probably not) some of the  
confusion of our peer.

In meta.wikimedia.org:

Demo_1 is a subcategory of Demo:

http://meta.wikimedia.org/wiki/Category:Demo_1
http://meta.wikimedia.org/wiki/Category:Demo

(and demo is a subcategory of English Documentation)

English Documentation and Demo both show up in Special:Categories -  
but  How is Demo_1 kept out of the list of categories?

http://meta.wikimedia.org/w/index.php? 
title=Special:Categories&limit=250&offset=0

Inquiring minds want to know.  (I've combed through the meta docs,  
and didn't see anything, I'm sure I'm missing something though)

Thanks,
Jason

--
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Jason Young --  Systems Engineer, eXtension
  http://about.extension.org/wiki/Jason_Young
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